diff --git a/.github/workflows/isort.yaml b/.github/workflows/isort.yaml
new file mode 100644
index 00000000..039aeb05
--- /dev/null
+++ b/.github/workflows/isort.yaml
@@ -0,0 +1,10 @@
+name: Run isort
+on:
+  - push
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: isort/isort-action@v1
diff --git a/.isort.cfg b/.isort.cfg
new file mode 100644
index 00000000..dbbfee21
--- /dev/null
+++ b/.isort.cfg
@@ -0,0 +1,3 @@
+[settings]
+profile=black
+force_single_line = true
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 00000000..24d59c04
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,54 @@
+# See https://pre-commit.com for more information
+# See https://pre-commit.com/hooks.html for more hooks
+
+default_language_version:
+  python: python3.9
+
+default_stages: [commit, push]
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v4.4.0
+    hooks:
+      - id: trailing-whitespace
+      - id: end-of-file-fixer
+      - id: check-yaml
+  - repo: https://github.com/psf/black
+    rev: 23.7.0
+    hooks:
+      - id: black
+#        args: ["--line-length=88", "--check", "--diff", "--force-exclude=migrations", "src/"]
+        args: ["--line-length=88", "--force-exclude=migrations", "src/"]
+        types: [python]
+        entry: black
+  - repo: https://github.com/PyCQA/flake8.git
+    rev: "6.1.0"
+    hooks:
+      - id: flake8
+        name: flake8
+        entry: flake8
+        types: [python]
+        args: ["--max-complexity=30", "--max-line-length=88", "--ignore=DJ01,DJ08,W503,ANN101", "--exclude=docs/*", "src/", "setup.py"]
+  - repo: https://github.com/pycqa/isort
+    rev: 5.12.0
+    hooks:
+      - id: isort
+        name: isort (python)
+#        args: ["--multi-line=3", "--lbt=1", "--trailing-comma", "--force-grid-wrap=0", "--use-parentheses", "--ensure-newline-before-comments", "--line-length=88"]
+  - repo: local
+    hooks:
+      - id: python-check-pdb
+        name: check pdb
+        description: 'PDB check inside code'
+        entry: '^\s?[^#]+\.set_trace\(\)'
+        language: pygrep
+        types: [python]
+  - repo: https://github.com/collective/zpretty
+    rev: 3.1.0
+    hooks:
+      - id: zpretty
+        name: zpretty
+  - repo: https://github.com/regebro/pyroma
+    rev: '4.2'
+    hooks:
+      - id: pyroma
diff --git a/CHANGES.rst b/CHANGES.rst
index 27082bd5..c59de6e6 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1,7 +1,76 @@
 Changelog
 =========
 
-5.2.3 (unreleased)
+5.4.3 (unreleased)
+------------------
+
+- Nothing changed yet.
+
+
+5.4.2 (2024-01-11)
+------------------
+
+- Fix deserializer for relationfield, add lstrip to path object calculation
+  [eikichi18]
+
+
+5.4.1 (2023-12-28)
+------------------
+
+- Fix deserializer for relationfield, use UID instead of @id
+  [eikichi18]
+
+- Isort
+  [folix-01]
+
+- Add monkeypatch to fix @scadeziario-day endpoint
+  [eikichi18]
+
+
+5.4.0 (2023-11-14)
+------------------
+
+- Return error instead of raise Excpetion for BadRequest in querystringsearch
+  [mamico]
+
+- Add upgrade step and setuphandler to fix robots.txt
+  original rules adding 'Allow: /*?expand*'
+  [lucabel]
+
+5.3.0 (2023-10-25)
+------------------
+
+- Fix: the 'fix-link' view has a bug that corrupts links by replacing
+  the current external URL with a URL that is always relative to the
+  site, even when requesting replacement with a link from a different
+  website.
+  [lucabel].
+
+- plone.app.redirector.FourOhFourView.search_for_similar patch to enable conditionally
+  the search for similar
+  [folix-01]
+
+- Set search/querystring-search limit patch only for anonymous users.
+  Auth users can need to perform an higher query (in contents view for example).
+  [cekk]
+
+- Re-apply context UID filter in querystringsearch service (as it is in plone.restapi).
+  [cekk]
+
+5.2.4 (2023-09-26)
+------------------
+
+- Fix the issue in the @translation GET endpoint: If this
+  endpoint is invoked, possibly by a bot, and plone.app.multilingual
+  is not installed, the call will result in an empty search query
+  on the catalog.
+  [lucabel]
+
+- backport https://github.com/plone/Products.CMFPlone/pull/3845
+  fix: avoid searching all users when many_users is flagged
+  [mamico]
+
+5.2.3 (2023-09-21)
 ------------------
 
 - Max search limit became configurable by env var 'REDTURTLE_VOLTO_MAX_LIMIT_SEARCH', 500 by default.
diff --git a/README.rst b/README.rst
index b2046a45..22a08b05 100644
--- a/README.rst
+++ b/README.rst
@@ -190,6 +190,9 @@ There is a monkeypatch for Events recurrences that fix their duration.
 
 If it works well, we can make a pr in p.a.event.
 
+There is another monkeypatch for Events recurrences to change the default behavior of start index serializer.
+Now it keeps all dates even if the single date is already passed.
+
 
 Respect locally allowed types on paste
 --------------------------------------
@@ -220,6 +223,12 @@ For details see the `pull-request <https://github.com/RedTurtle/redturtle.volto/
 
 This patch is not enabled by default. You need to set an environment variable to `true`: *PROXY_BEARER_AUTH*.
 
+Conditionally search for similar if nonexistent site path passed
+----------------------------------------------------------------
+
+plone.app.redirector.FourOhFourView.search_for_similar method patched to return an empty list if
+the `REDTURTLE_VOLTO_ENABLE_SEARCH_FOR_SIMILAR` environment variable is set.
+
 New Criteria
 ============
 
diff --git a/docs/conf.py b/docs/conf.py
index aeab1895..0c999488 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -9,8 +9,8 @@
 # All configuration values have a default; values that are commented out
 # serve to show the default.
 
-import sys
 import os
+import sys
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
diff --git a/setup.py b/setup.py
index d06b33dd..96656ddd 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,6 @@
 from setuptools import find_packages
 from setuptools import setup
 
-
 long_description = "\n\n".join(
     [
         open("README.rst").read(),
@@ -16,7 +15,7 @@
 
 setup(
     name="redturtle.volto",
-    version="5.2.3.dev0",
+    version="5.4.3.dev0",
     description="Helper package to setup a RedTurtle's Plone site ready to work with Volto.",
     long_description=long_description,
     # Get more from https://pypi.org/classifiers/
diff --git a/src/redturtle/volto/__init__.py b/src/redturtle/volto/__init__.py
index 4768b30c..266d2662 100644
--- a/src/redturtle/volto/__init__.py
+++ b/src/redturtle/volto/__init__.py
@@ -1,17 +1,17 @@
 # -*- coding: utf-8 -*-
 """Init and utils."""
+import logging
+import re
+
 from plone.app.content.browser.vocabulary import PERMISSIONS
 from plone.folder.nogopip import GopipIndex
 from plone.restapi.serializer import utils
 from Products.ZCatalog.Catalog import Catalog
-from redturtle.volto.catalogplan import Catalog_sorted_search_indexes
 from zope.i18nmessageid import MessageFactory
 from ZTUtils.Lazy import LazyCat
 from ZTUtils.Lazy import LazyMap
 
-import logging
-import re
-
+from redturtle.volto.catalogplan import Catalog_sorted_search_indexes
 
 logger = logging.getLogger(__name__)
 
diff --git a/src/redturtle/volto/adapters/stringinterp.py b/src/redturtle/volto/adapters/stringinterp.py
index a4a4e215..b97a007e 100644
--- a/src/redturtle/volto/adapters/stringinterp.py
+++ b/src/redturtle/volto/adapters/stringinterp.py
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 from plone.stringinterp.adapters import BaseSubstitution
 from Products.CMFCore.interfaces import IContentish
-from redturtle.volto import _
 from zope.component import adapter
 
+from redturtle.volto import _
 
 try:
     from plone.stringinterp import _ as stringinterp_mf
diff --git a/src/redturtle/volto/browser/controlpanel.py b/src/redturtle/volto/browser/controlpanel.py
index e157567e..46d6c97c 100644
--- a/src/redturtle/volto/browser/controlpanel.py
+++ b/src/redturtle/volto/browser/controlpanel.py
@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 from plone.app.registry.browser.controlpanel import ControlPanelFormWrapper
 from plone.app.registry.browser.controlpanel import RegistryEditForm
+
 from redturtle.volto import _
 from redturtle.volto.interfaces import IRedTurtleVoltoSettings
 
diff --git a/src/redturtle/volto/browser/find_blocks.py b/src/redturtle/volto/browser/find_blocks.py
index dec9a452..3627348a 100644
--- a/src/redturtle/volto/browser/find_blocks.py
+++ b/src/redturtle/volto/browser/find_blocks.py
@@ -1,15 +1,14 @@
 # -*- coding: utf-8 -*-
-from Acquisition import aq_base
+import json
+import logging
 from copy import deepcopy
+
+from Acquisition import aq_base
 from plone import api
 from plone.dexterity.utils import iterSchemata
 from Products.Five import BrowserView
 from zope.schema import getFieldsInOrder
 
-import json
-import logging
-
-
 logger = logging.getLogger(__name__)
 
 BLOCKS = [
diff --git a/src/redturtle/volto/browser/fix_links.py b/src/redturtle/volto/browser/fix_links.py
index 0ced9f9d..9777a10e 100644
--- a/src/redturtle/volto/browser/fix_links.py
+++ b/src/redturtle/volto/browser/fix_links.py
@@ -1,4 +1,10 @@
 # -*- coding: utf-8 -*-
+import json
+import logging
+import re
+from urllib.parse import urlparse
+from urllib.parse import urlunparse
+
 from Acquisition import aq_base
 from plone import api
 from plone.dexterity.utils import iterSchemata
@@ -7,11 +13,6 @@
 from zope.component import queryMultiAdapter
 from zope.schema import getFieldsInOrder
 
-import json
-import logging
-import re
-
-
 logger = logging.getLogger(__name__)
 
 
@@ -68,6 +69,7 @@ def __call__(self):
                         # set the new value anyway because some values could not be transformed,
                         # but they now have the right url anyway.
                         setattr(item, name, res["new_value"])
+                        item.reindexObject()
             i += 1
         logger.info("### END ###")
         logger.info("### {} items fixed ###".format(len(fixed_objects)))
@@ -94,6 +96,10 @@ def check_pattern(self, value):
                 return True
 
     def replace_pattern(self, value, is_link=False):
+        # obtain data to make link sub evaluation
+        current_host = urlparse(self.request.URL).netloc
+        destination_host = urlparse(self.portal_url).netloc
+
         for url in self.request.form.get("to_replace", "").split():
             match = re.search(r"(?<={}).*".format(url), value)
             if match:
@@ -106,7 +112,11 @@ def replace_pattern(self, value, is_link=False):
                     return value
                 if obj:
                     if is_link:
-                        return "${portal_url}/resolveuid/" + obj.UID()
+                        if current_host != destination_host:
+                            new_url = urlparse(value)._replace(netloc=destination_host)
+                            return urlunparse(new_url)
+                        else:
+                            return "${portal_url}/resolveuid/" + obj.UID()
                     else:
                         return obj.UID()
         return value
diff --git a/src/redturtle/volto/browser/sitemap.py b/src/redturtle/volto/browser/sitemap.py
index 6b26edd1..c451acbb 100644
--- a/src/redturtle/volto/browser/sitemap.py
+++ b/src/redturtle/volto/browser/sitemap.py
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+import datetime
+
 from BTrees.OOBTree import OOBTree
 from plone.app.layout.sitemap.sitemap import SiteMapView as LayoutSiteMapView
 from plone.registry.interfaces import IRegistry
@@ -6,8 +8,6 @@
 from Products.CMFPlone.interfaces import IPloneSiteRoot
 from zope.component import getUtility
 
-import datetime
-
 
 class SiteMapView(LayoutSiteMapView):
     def objects(self):
diff --git a/src/redturtle/volto/config/__init__.py b/src/redturtle/volto/config/__init__.py
index caf3ecbe..34c0cdb6 100644
--- a/src/redturtle/volto/config/__init__.py
+++ b/src/redturtle/volto/config/__init__.py
@@ -1,4 +1,3 @@
 import os
 
-
 MAX_LIMIT = int(os.environ.get("REDTURTLE_VOLTO_MAX_LIMIT_SEARCH") or 500)
diff --git a/src/redturtle/volto/interfaces.py b/src/redturtle/volto/interfaces.py
index e495492a..67d27c2c 100644
--- a/src/redturtle/volto/interfaces.py
+++ b/src/redturtle/volto/interfaces.py
@@ -1,10 +1,11 @@
 # -*- coding: utf-8 -*-
 from plone.restapi.controlpanels.interfaces import IControlpanel
-from redturtle.volto import _
 from zope.interface import Interface
 from zope.publisher.interfaces.browser import IDefaultBrowserLayer
 from zope.schema import Bool
 
+from redturtle.volto import _
+
 
 class IRedturtleVoltoLayer(IDefaultBrowserLayer):
     """Marker interface that defines a browser layer."""
diff --git a/src/redturtle/volto/locales/update.py b/src/redturtle/volto/locales/update.py
index a694c489..37421d50 100644
--- a/src/redturtle/volto/locales/update.py
+++ b/src/redturtle/volto/locales/update.py
@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 
 import os
-import pkg_resources
 import subprocess
 
+import pkg_resources
 
 domain = "redturtle.volto"
 os.chdir(pkg_resources.resource_filename(domain, ""))
diff --git a/src/redturtle/volto/monkey.py b/src/redturtle/volto/monkey.py
index 168183bf..7dfd4c70 100644
--- a/src/redturtle/volto/monkey.py
+++ b/src/redturtle/volto/monkey.py
@@ -1,16 +1,20 @@
 # -*- coding: utf-8 -*-
+import datetime
+import os
+
 from Acquisition import aq_base
 from plone.app.caching import purge
 from plone.app.event.base import dt_start_of_day
+from plone.app.event.dx.behaviors import IEventBasic
 from plone.app.event.recurrence import Occurrence
+from plone.app.multilingual.interfaces import IPloneAppMultilingualInstalled
 from plone.event.interfaces import IEventAccessor
+from plone.event.interfaces import IRecurrenceSupport
 from plone.event.recurrence import recurrence_sequence_ical
 from plone.event.utils import pydt
 from Products.CMFPlone.interfaces import IConstrainTypes
 from zope.globalrequest import getRequest
 
-import datetime
-
 
 def occurrences(self, range_start=None, range_end=None):
     """Return all occurrences of an event, possibly within a start and end
@@ -58,6 +62,7 @@ def occurrences(self, range_start=None, range_end=None):
         else:
             duration = event_end - event_start
         # END OF PATCH
+
     starts = recurrence_sequence_ical(
         event_start,
         recrule=event.recurrence,
@@ -85,6 +90,17 @@ def get_obj(start):
         yield get_obj(start)
 
 
+def _recurrence_upcoming_event(self):
+    """Return the next upcoming event"""
+    adapter = IRecurrenceSupport(self.context)
+    occs = adapter.occurrences()
+    try:
+        return next(occs)
+    except StopIteration:
+        # No more future occurrences: passed event
+        return IEventBasic(self.context)
+
+
 def _verifyObjectPaste(self, obj, validate_src=True):
     self._old__verifyObjectPaste(obj, validate_src=True)
     portal_type = getattr(aq_base(obj), "portal_type", None)
@@ -123,3 +139,37 @@ def plone_volto_serializer_call(self, value):
     ]
 except ImportError:
     pass
+
+
+# https://github.com/plone/Products.CMFPlone/pull/3845
+def getPotentialMembers(self, searchString):
+    form = self.request.form
+    findAll = form.get("form.button.FindAll", None) is not None and not self.many_users
+    if findAll or searchString:
+        return self._old_getPotentialMembers(searchString)
+    return []
+
+
+def plone_restapi_pam_translations_get(self, expand=False):
+    """If plone.app.multilingual is not installed get_restricted_translations will
+    search for the translations in the portal catalog with the unexisting index
+    TranslationsGruop. this measn that the method will iterate over the whole
+    catalog. We need to check if the method is available before calling it.
+    """
+    if not IPloneAppMultilingualInstalled.providedBy(self.request):
+        return {"translations": {"@id": f"{self.context.absolute_url()}/@translations"}}
+    return self._old___call__(expand=expand)
+
+
+def search_for_similar(*args, **kwargs):
+    """plone.app.redirector.browser.FourOhFourView.search_for_similar patch"""
+
+    original_obj = args and args[0] or None
+
+    if (
+        os.environ.get("REDTURTLE_VOLTO_ENABLE_SEARCH_FOR_SIMILAR", default=None)
+        and original_obj  # noqa
+    ):
+        return original_obj._old_search_for_similar()
+
+    return []
diff --git a/src/redturtle/volto/monkey.zcml b/src/redturtle/volto/monkey.zcml
index 24437963..fc06d6d3 100644
--- a/src/redturtle/volto/monkey.zcml
+++ b/src/redturtle/volto/monkey.zcml
@@ -13,6 +13,13 @@
       description="This fix the problem with Events recurrences"
       />
 
+  <monkey:patch
+      original="_recurrence_upcoming_event"
+      replacement=".monkey._recurrence_upcoming_event"
+      class="plone.app.event.dx.behaviors.EventAccessor"
+      description="This fix the problem with Events recurrences"
+      />
+
   <monkey:patch
       original="_verifyObjectPaste"
       replacement=".monkey._verifyObjectPaste"
@@ -33,4 +40,28 @@
       class="plone.volto.transforms.NestedResolveUIDSerializerBase"
       description="Patch for disallow plone.volto serialization"
       />
+
+  <monkey:patch
+      original="getPotentialMembers"
+      replacement=".monkey.getPotentialMembers"
+      class="Products.CMFPlone.controlpanel.browser.usergroups_groupmembership.GroupMembershipControlPanel"
+      description="Patch for disallow search all users in group"
+      preserveOriginal="True"
+      />
+
+  <monkey:patch
+      original="__call__"
+      replacement=".monkey.plone_restapi_pam_translations_get"
+      class="plone.restapi.services.multilingual.pam.Translations"
+      description="Fix long request in case pam is not installed"
+      preserveOriginal="True"
+      />
+  <monkey:patch
+      original="search_for_similar"
+      replacement=".monkey.search_for_similar"
+      class="plone.app.redirector.browser.FourOhFourView"
+      description="Cancel the seach_for_similiar call when usin volto frontend"
+      preserveOriginal="True"
+      />
+
 </configure>
diff --git a/src/redturtle/volto/profiles/default/metadata.xml b/src/redturtle/volto/profiles/default/metadata.xml
index 7e649863..ac6727fb 100644
--- a/src/redturtle/volto/profiles/default/metadata.xml
+++ b/src/redturtle/volto/profiles/default/metadata.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <metadata>
-  <version>4200</version>
+  <version>4301</version>
   <dependencies>
     <dependency>profile-plone.volto:default</dependency>
     <dependency>profile-plone.app.caching:with-caching-proxy</dependency>
diff --git a/src/redturtle/volto/restapi/deserializer/blocks.py b/src/redturtle/volto/restapi/deserializer/blocks.py
index ed19fefa..868c2f4b 100644
--- a/src/redturtle/volto/restapi/deserializer/blocks.py
+++ b/src/redturtle/volto/restapi/deserializer/blocks.py
@@ -1,13 +1,14 @@
 # -*- coding: utf-8 -*-
 from copy import deepcopy
+
 from plone.restapi.behaviors import IBlocks
 from plone.restapi.deserializer.blocks import path2uid
 from plone.restapi.interfaces import IBlockFieldDeserializationTransformer
 from Products.CMFPlone.interfaces import IPloneSiteRoot
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
 from zope.interface import implementer
 
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 EXCLUDE_KEYS = ["@type", "token", "value", "@id", "query"]
 EXCLUDE_TYPES = ["title", "listing", "calendar", "searchEvents"]
diff --git a/src/redturtle/volto/restapi/deserializer/configure.zcml b/src/redturtle/volto/restapi/deserializer/configure.zcml
index 36236474..9398f48a 100644
--- a/src/redturtle/volto/restapi/deserializer/configure.zcml
+++ b/src/redturtle/volto/restapi/deserializer/configure.zcml
@@ -28,6 +28,9 @@
   <!-- convert Link widget value in normalized url -->
   <adapter factory=".dxfields.LinkTextLineFieldDeserializer" />
 
+  <!-- convert related string obj to obj -->
+  <adapter factory=".relationfield.RelationChoiceFieldDeserializer" />
+
 
   <adapter factory=".dxfields.DatetimeFieldDeserializer" />
 
diff --git a/src/redturtle/volto/restapi/deserializer/dxfields.py b/src/redturtle/volto/restapi/deserializer/dxfields.py
index 9a530198..3750c740 100644
--- a/src/redturtle/volto/restapi/deserializer/dxfields.py
+++ b/src/redturtle/volto/restapi/deserializer/dxfields.py
@@ -1,4 +1,7 @@
 # -*- coding: utf-8 -*-
+import dateutil
+import lxml
+import pytz
 from plone.app.contenttypes.interfaces import ILink
 from plone.app.dexterity.behaviors.metadata import IPublication
 from plone.app.event.base import default_timezone
@@ -18,7 +21,6 @@
 from Products.CMFPlone.utils import safe_unicode
 from pytz import timezone
 from pytz import utc
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from z3c.form.interfaces import IDataManager
 from zope.component import adapter
 from zope.component import getMultiAdapter
@@ -27,9 +29,7 @@
 from zope.schema.interfaces import IDatetime
 from zope.schema.interfaces import ITextLine
 
-import dateutil
-import lxml
-import pytz
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 
 @implementer(IFieldDeserializer)
diff --git a/src/redturtle/volto/restapi/deserializer/relationfield.py b/src/redturtle/volto/restapi/deserializer/relationfield.py
new file mode 100644
index 00000000..0693e119
--- /dev/null
+++ b/src/redturtle/volto/restapi/deserializer/relationfield.py
@@ -0,0 +1,63 @@
+from urllib.parse import urlparse
+
+from plone.dexterity.interfaces import IDexterityContent
+from plone.restapi.deserializer.dxfields import DefaultFieldDeserializer
+from plone.restapi.interfaces import IFieldDeserializer
+from Products.CMFCore.utils import getToolByName
+from z3c.relationfield.interfaces import IRelationChoice
+from zope.component import adapter
+from zope.component import getMultiAdapter
+from zope.component import queryUtility
+from zope.interface import implementer
+from zope.intid.interfaces import IIntIds
+
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
+
+
+@implementer(IFieldDeserializer)
+@adapter(IRelationChoice, IDexterityContent, IRedturtleVoltoLayer)
+class RelationChoiceFieldDeserializer(DefaultFieldDeserializer):
+    def __call__(self, value):
+        obj = None
+        resolved_by = None
+
+        if isinstance(value, dict):
+            # We are trying to deserialize the output of a serialization
+            # which is enhanced, extract it and put it on the loop again
+            value = value["UID"] if value.get("UID", None) else value["@id"]
+
+        if isinstance(value, int):
+            # Resolve by intid
+            intids = queryUtility(IIntIds)
+            obj = intids.queryObject(value)
+            resolved_by = "intid"
+        elif isinstance(value, str):
+            portal = getMultiAdapter(
+                (self.context, self.request), name="plone_portal_state"
+            ).portal()
+            portal_url = portal.absolute_url()
+            if value.startswith(portal_url):
+                # Resolve by URL
+                obj = portal.restrictedTraverse(urlparse(value).path.lstrip("/"), None)
+                resolved_by = "URL"
+            elif value.startswith("/"):
+                # Resolve by path
+                obj = portal.restrictedTraverse(value.lstrip("/"), None)
+                resolved_by = "path"
+            else:
+                # Resolve by UID
+                catalog = getToolByName(self.context, "portal_catalog")
+                brain = catalog(UID=value)
+                if brain:
+                    obj = brain[0].getObject()
+                resolved_by = "UID"
+
+        if obj is None:
+            self.request.response.setStatus(400)
+            msg = f"Could not resolve object for {value}"
+            if resolved_by:
+                msg += f" (resolved by {resolved_by})"
+            raise ValueError(msg)
+
+        self.field.validate(obj)
+        return obj
diff --git a/src/redturtle/volto/restapi/search/query.py b/src/redturtle/volto/restapi/search/query.py
index 0f6da732..e5646a0e 100644
--- a/src/redturtle/volto/restapi/search/query.py
+++ b/src/redturtle/volto/restapi/search/query.py
@@ -1,15 +1,16 @@
 # -*- coding: utf-8 -*-
+import re
+
 from plone.restapi.interfaces import IIndexQueryParser
 from plone.restapi.search.query import (
     ZCTextIndexQueryParser as BaseZCTextIndexQueryParser,
 )
 from Products.ZCTextIndex.ZCTextIndex import ZCTextIndex
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
-from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import implementer
 
-import re
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 
 @implementer(IIndexQueryParser)
diff --git a/src/redturtle/volto/restapi/serializer/blocks.py b/src/redturtle/volto/restapi/serializer/blocks.py
index f32fb0a5..ce0b3bc9 100644
--- a/src/redturtle/volto/restapi/serializer/blocks.py
+++ b/src/redturtle/volto/restapi/serializer/blocks.py
@@ -1,17 +1,18 @@
 # -*- coding: utf-8 -*-
 from copy import deepcopy
+
 from plone import api
 from plone.restapi.behaviors import IBlocks
 from plone.restapi.interfaces import IBlockFieldSerializationTransformer
 from plone.restapi.interfaces import ISerializeToJsonSummary
 from plone.restapi.serializer.blocks import uid_to_url
 from Products.CMFPlone.interfaces import IPloneSiteRoot
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
 from zope.component import getMultiAdapter
 from zope.globalrequest import getRequest
 from zope.interface import implementer
 
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 EXCLUDE_KEYS = ["@type"]
 EXCLUDE_TYPES = ["title", "listing"]
diff --git a/src/redturtle/volto/restapi/serializer/dxfields.py b/src/redturtle/volto/restapi/serializer/dxfields.py
index d5f81fe2..1565e8a3 100644
--- a/src/redturtle/volto/restapi/serializer/dxfields.py
+++ b/src/redturtle/volto/restapi/serializer/dxfields.py
@@ -1,4 +1,6 @@
 # -*- coding: utf-8 -*-
+import re
+
 from plone.app.contenttypes.interfaces import ILink
 from plone.app.contenttypes.utils import replace_link_variables_by_paths
 from plone.app.dexterity.behaviors.metadata import IPublication
@@ -7,14 +9,12 @@
 from plone.restapi.serializer.converters import json_compatible
 from plone.restapi.serializer.dxfields import DefaultFieldSerializer
 from plone.restapi.serializer.utils import uid_to_url
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
 from zope.interface import implementer
 from zope.schema.interfaces import IDatetime
 from zope.schema.interfaces import ITextLine
 
-import re
-
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 RESOLVEUID_RE = re.compile(".*?/resolve[Uu]id/([^/]*)/?(.*)$")
 
diff --git a/src/redturtle/volto/restapi/serializer/summary.py b/src/redturtle/volto/restapi/serializer/summary.py
index 83e70c1c..901fcdb3 100644
--- a/src/redturtle/volto/restapi/serializer/summary.py
+++ b/src/redturtle/volto/restapi/serializer/summary.py
@@ -8,11 +8,11 @@
     DefaultJSONSummarySerializer as BaseSerializer,
 )
 from plone.restapi.serializer.utils import uid_to_url
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
-from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import implementer
 
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
 EMPTY_STRINGS = ["None"]
 
diff --git a/src/redturtle/volto/restapi/services/controlpanel.py b/src/redturtle/volto/restapi/services/controlpanel.py
index 3606ef6e..47915d6b 100644
--- a/src/redturtle/volto/restapi/services/controlpanel.py
+++ b/src/redturtle/volto/restapi/services/controlpanel.py
@@ -1,10 +1,11 @@
 # -*- coding: utf-8 -*-
 from plone.restapi.controlpanels import RegistryConfigletPanel
-from redturtle.volto.interfaces import IRedTurtleVoltoSettings
-from redturtle.volto.interfaces import IRedTurtleVoltoSettingsControlpanel
 from zope.component import adapter
-from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import implementer
+
+from redturtle.volto.interfaces import IRedTurtleVoltoSettings
+from redturtle.volto.interfaces import IRedTurtleVoltoSettingsControlpanel
 
 
 @adapter(Interface, Interface)
diff --git a/src/redturtle/volto/restapi/services/navigation/get.py b/src/redturtle/volto/restapi/services/navigation/get.py
index 4490a013..26c85005 100644
--- a/src/redturtle/volto/restapi/services/navigation/get.py
+++ b/src/redturtle/volto/restapi/services/navigation/get.py
@@ -1,12 +1,12 @@
 # -*- coding: utf-8 -*-
-from plone.app.layout.navigation.navtree import buildFolderTree
 from plone.app.layout.navigation.navtree import NavtreeStrategyBase
+from plone.app.layout.navigation.navtree import buildFolderTree
 from plone.dexterity.interfaces import IDexterityContainer
 from plone.restapi.interfaces import IExpandableElement
 from plone.restapi.services import Service
 from zope.component import adapter
-from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import implementer
 
 
 @implementer(IExpandableElement)
diff --git a/src/redturtle/volto/restapi/services/querystringsearch/get.py b/src/redturtle/volto/restapi/services/querystringsearch/get.py
index fab8a8a9..72cdaf60 100644
--- a/src/redturtle/volto/restapi/services/querystringsearch/get.py
+++ b/src/redturtle/volto/restapi/services/querystringsearch/get.py
@@ -1,24 +1,27 @@
 # -*- coding: utf-8 -*-
+import logging
 from datetime import datetime
+from urllib import parse
+
 from DateTime import DateTime
+from plone import api
 from plone.app.event.base import get_events
 from plone.app.querystring import queryparser
 from plone.restapi.batching import HypermediaBatch
+from plone.restapi.bbb import IPloneSiteRoot
 from plone.restapi.deserializer import json_body
 from plone.restapi.exceptions import DeserializationError
 from plone.restapi.interfaces import ISerializeToJson
 from plone.restapi.interfaces import ISerializeToJsonSummary
 from plone.restapi.services import Service
+from plone.restapi.services.querystringsearch.get import SUPPORT_NOT_UUID_QUERIES
 from plone.restapi.services.querystringsearch.get import (
     QuerystringSearch as BaseQuerystringSearch,
 )
-from redturtle.volto.config import MAX_LIMIT
-from urllib import parse
 from zExceptions import BadRequest
 from zope.component import getMultiAdapter
 
-import logging
-
+from redturtle.volto.config import MAX_LIMIT
 
 logger = logging.getLogger(__name__)
 
@@ -37,17 +40,20 @@ def __call__(self):
         try:
             b_start = int(data.get("b_start", 0))
         except ValueError:
-            raise BadRequest("Invalid b_start")
+            self.request.response.setStatus(400)
+            return dict(error=dict(type="BadRequest", message="Invalid b_start"))
         try:
             b_size = int(data.get("b_size", 25))
         except ValueError:
-            raise BadRequest("Invalid b_size")
+            self.request.response.setStatus(400)
+            return dict(error=dict(type="BadRequest", message="Invalid b_size"))
         sort_on = data.get("sort_on", None)
         sort_order = data.get("sort_order", None)
 
         # LIMIT PATCH
         if not query:
-            raise BadRequest("No query supplied")
+            self.request.response.setStatus(400)
+            return dict(error=dict(type="BadRequest", message="No query supplied"))
         limit = self.get_limit(data=data)
         # END OF LIMIT PATCH
 
@@ -70,14 +76,12 @@ def __call__(self):
             limit=limit,
         )
 
-        # PATCH: we disable this query to boost performances on big sites
         # Exclude "self" content item from the results when ZCatalog supports NOT UUID
         # queries and it is called on a content object.
-        # if not IPloneSiteRoot.providedBy(self.context) and SUPPORT_NOT_UUID_QUERIES:
-        #     querybuilder_parameters.update(
-        #         dict(custom_query={"UID": {"not": self.context.UID()}})
-        #     )
-        # END OF PATCH
+        if not IPloneSiteRoot.providedBy(self.context) and SUPPORT_NOT_UUID_QUERIES:
+            querybuilder_parameters.update(
+                dict(custom_query={"UID": {"not": self.context.UID()}})
+            )
 
         try:
             results = querybuilder(**querybuilder_parameters)
@@ -85,7 +89,8 @@ def __call__(self):
             # This can happen if the query has an invalid operation,
             # but plone.app.querystring doesn't raise an exception
             # with specific info.
-            raise BadRequest("Invalid query.")
+            self.request.response.setStatus(400)
+            return dict(error=dict(type="BadRequest", message="Invalid query"))
 
         results = getMultiAdapter((results, self.request), ISerializeToJson)(
             fullobjects=fullobjects
@@ -96,27 +101,34 @@ def get_limit(self, data):
         """
         If limit is <= 0 or higher than MAX_LIMIT, set it to MAX_LIMIT
         """
+        is_anon = api.user.is_anonymous()
+        default_value = is_anon and MAX_LIMIT or max(1000, MAX_LIMIT)
+        if "limit" not in data:
+            return default_value
         try:
-            limit = int(data.get("limit", MAX_LIMIT))
-        except ValueError:
-            raise BadRequest("Invalid limit")
+            limit = int(data.get("limit", default_value))
+        except ValueError as exc:
+            raise BadRequest("Invalid limit") from exc
 
-        if "limit" in data and limit <= 0:
+        if limit <= 0:
             del data["limit"]
-            limit = MAX_LIMIT
-        if limit > MAX_LIMIT:
+            limit = default_value
+        if limit > default_value:
             logger.warning(
                 '[wrong query] limit is too high: "{}". Set to default ({}).'.format(
-                    data["query"], MAX_LIMIT
+                    data["query"], default_value
                 )
             )
-            limit = MAX_LIMIT
+            limit = default_value
         return limit
 
     def is_event_search(self, query):
         """
         Check if we need to perform a custom search with p.a.events method
         """
+        if not query:
+            return False
+
         indexes = [x["i"] for x in query]
 
         portal_type_check = False
diff --git a/src/redturtle/volto/restapi/services/search/get.py b/src/redturtle/volto/restapi/services/search/get.py
index 780d584e..302fe42c 100644
--- a/src/redturtle/volto/restapi/services/search/get.py
+++ b/src/redturtle/volto/restapi/services/search/get.py
@@ -4,11 +4,11 @@
 from plone.restapi.search.handler import SearchHandler as OriginalHandler
 from plone.restapi.search.utils import unflatten_dotted_dict
 from plone.restapi.services import Service
+from zope.component import getMultiAdapter
+
 from redturtle.volto import logger
 from redturtle.volto.config import MAX_LIMIT
 from redturtle.volto.interfaces import IRedTurtleVoltoSettings
-from zope.component import getMultiAdapter
-
 
 # search for 'ranking' in 'SearchableText' and rank very high
 # when the term is in 'Subject' and high when it is in 'Title'.
@@ -124,26 +124,30 @@ def search(self, query=None):
         return super(SearchHandler, self).search(query)
 
     def _parse_query(self, query):
+        """
+        set a max limit for anonymous calls
+        """
         query = super()._parse_query(query)
-        for idx in ["sort_limit", "b_size"]:
-            if idx not in query:
-                continue
-            value = query.get(idx, MAX_LIMIT)
-            if value <= 0:
-                logger.warning(
-                    '[wrong query] {} is wrong: "{}". Set to default ({}).'.format(
-                        idx, query, MAX_LIMIT
+        if api.user.is_anonymous():
+            for idx in ["sort_limit", "b_size"]:
+                if idx not in query:
+                    continue
+                value = query.get(idx, MAX_LIMIT)
+                if value <= 0:
+                    logger.warning(
+                        '[wrong query] {} is wrong: "{}". Set to default ({}).'.format(
+                            idx, query, MAX_LIMIT
+                        )
                     )
-                )
-                query[idx] = MAX_LIMIT
+                    query[idx] = MAX_LIMIT
 
-            if value > MAX_LIMIT:
-                logger.warning(
-                    '[wrong query] {} is too high: "{}". Set to default ({}).'.format(
-                        idx, query, MAX_LIMIT
+                if value > MAX_LIMIT:
+                    logger.warning(
+                        '[wrong query] {} is too high: "{}". Set to default ({}).'.format(
+                            idx, query, MAX_LIMIT
+                        )
                     )
-                )
-                query[idx] = MAX_LIMIT
+                    query[idx] = MAX_LIMIT
         return query
 
 
diff --git a/src/redturtle/volto/setuphandlers.py b/src/redturtle/volto/setuphandlers.py
index 51247e31..3eff52a6 100644
--- a/src/redturtle/volto/setuphandlers.py
+++ b/src/redturtle/volto/setuphandlers.py
@@ -1,7 +1,12 @@
 # -*- coding: utf-8 -*-
+import logging
+
+from plone import api
 from Products.CMFPlone.interfaces import INonInstallable
 from zope.interface import implementer
 
+logger = logging.getLogger(__name__)
+
 
 @implementer(INonInstallable)
 class HiddenProfiles(object):
@@ -10,8 +15,56 @@ def getNonInstallableProfiles(self):
         return ["redturtle.volto:uninstall"]
 
 
+def upgrade_robots_txt(context):
+    robots = api.portal.get_registry_record("plone.robots_txt")
+    lines = robots.splitlines()
+
+    googlebot_user_agent = "User-Agent: Googlebot"
+    # I saw this writed also as googlebot, so:
+    normalized_google_bot_user_agent = googlebot_user_agent.lower().replace(" ", "")
+
+    useragent_string = "User-Agent: "
+    normalized_useragent_string = useragent_string.lower().replace(" ", "")
+
+    googlebot_allow_rule = "Allow: /*?expand*"
+
+    googlebot_index = -1
+    allow_rule_present = False
+    for i, line in enumerate(lines):
+        if line.lower().replace(" ", "") == normalized_google_bot_user_agent:
+            googlebot_index = i
+        elif (
+            googlebot_index != -1
+            and line.replace(" ", "").lower()  # noqa
+            == googlebot_allow_rule.replace(" ", "").lower()  # noqa
+        ):
+            allow_rule_present = True
+
+    if googlebot_index != -1 and not allow_rule_present:
+        # Trova l'indice della fine della sezione User-Agent: Googlebot
+        end_googlebot_index = googlebot_index + 1
+        while end_googlebot_index < len(lines) and not lines[
+            end_googlebot_index
+        ].lower().replace(" ", "").startswith(normalized_useragent_string):
+            end_googlebot_index += 1
+
+        # Aggiungi Allow: /*?expand* alla fine della sezione User-Agent: Googlebot
+        if lines[end_googlebot_index - 1] == "":
+            end_googlebot_index -= 1
+        lines.insert(end_googlebot_index, googlebot_allow_rule)
+
+        lines = "\n".join(lines)
+        api.portal.set_registry_record("plone.robots_txt", lines)
+        logger.info("Upgrade robots.txt with rule for googlebot")
+    else:
+        logger.info(
+            "Rule for Googlebot already present in robots.txt, no action needed"
+        )
+
+
 def post_install(context):
     """Post install script"""
+    upgrade_robots_txt(context)
 
 
 def uninstall(context):
diff --git a/src/redturtle/volto/testing.py b/src/redturtle/volto/testing.py
index 81d9eb91..3422c56e 100644
--- a/src/redturtle/volto/testing.py
+++ b/src/redturtle/volto/testing.py
@@ -1,18 +1,18 @@
 # -*- coding: utf-8 -*-
+import collective.volto.cookieconsent
+import kitconcept.seo
+import plone.app.caching
+import plone.restapi
+import plone.volto
 from plone.app.contenttypes.testing import PLONE_APP_CONTENTTYPES_FIXTURE
 from plone.app.robotframework.testing import REMOTE_LIBRARY_BUNDLE_FIXTURE
-from plone.app.testing import applyProfile
 from plone.app.testing import FunctionalTesting
 from plone.app.testing import IntegrationTesting
 from plone.app.testing import PloneSandboxLayer
+from plone.app.testing import applyProfile
 from plone.restapi.testing import PloneRestApiDXLayer
 from plone.testing import z2
 
-import collective.volto.cookieconsent
-import kitconcept.seo
-import plone.app.caching
-import plone.restapi
-import plone.volto
 import redturtle.volto
 
 
diff --git a/src/redturtle/volto/tests/test_advancedsearch.py b/src/redturtle/volto/tests/test_advancedsearch.py
index b7ffc95d..aad4f475 100644
--- a/src/redturtle/volto/tests/test_advancedsearch.py
+++ b/src/redturtle/volto/tests/test_advancedsearch.py
@@ -1,16 +1,17 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from DateTime import DateTime
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.interfaces import IRedTurtleVoltoSettings
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 
-import unittest
+from redturtle.volto.interfaces import IRedTurtleVoltoSettings
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class BaseTest(unittest.TestCase):
@@ -166,6 +167,10 @@ def test_search_by_not_handled_index_type_return_standard_order(self):
             ["f1", "d1", "e1"], [item["@id"].split("/")[-1] for item in result["items"]]
         )
 
+    def test_search_no_query(self):
+        response = self.api_session.post("/@querystring-search")
+        self.assertEqual(response.status_code, 400)
+
     def test_search_ignore_non_existent_indexes_and_return_custom_order_if_possible(
         self,
     ):
diff --git a/src/redturtle/volto/tests/test_blocks_searchable_text.py b/src/redturtle/volto/tests/test_blocks_searchable_text.py
index cc70a6a8..5033231d 100644
--- a/src/redturtle/volto/tests/test_blocks_searchable_text.py
+++ b/src/redturtle/volto/tests/test_blocks_searchable_text.py
@@ -1,11 +1,12 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
-from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
+from plone.app.testing import setRoles
 from transaction import commit
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
 
 
 class TestBlocksSearchable(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_blocks_serializer.py b/src/redturtle/volto/tests/test_blocks_serializer.py
index 17859ee2..0a890c22 100644
--- a/src/redturtle/volto/tests/test_blocks_serializer.py
+++ b/src/redturtle/volto/tests/test_blocks_serializer.py
@@ -1,19 +1,20 @@
 # -*- coding: utf-8 -*-
+import os
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.registry.interfaces import IRegistry
 from plone.restapi.interfaces import ISerializeToJsonSummary
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 from zope.component import getMultiAdapter
 from zope.component import getUtility
 
-import os
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestBlocksSerializer(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_catalog_limit_patches.py b/src/redturtle/volto/tests/test_catalog_limit_patches.py
index 872e3571..1127c5ac 100644
--- a/src/redturtle/volto/tests/test_catalog_limit_patches.py
+++ b/src/redturtle/volto/tests/test_catalog_limit_patches.py
@@ -1,16 +1,17 @@
 # -*- coding: utf-8 -*-
+import json
+import unittest
+from urllib.parse import quote
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
-from urllib.parse import quote
 
-import json
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class CatalogLimitPatches(unittest.TestCase):
@@ -25,28 +26,33 @@ def setUp(self):
         setRoles(self.portal, TEST_USER_ID, ["Manager"])
 
         for i in range(self.MAX_LIMIT + 1):
-            api.content.create(
+            doc = api.content.create(
                 container=self.portal,
                 type="Document",
                 title=f"Document {i}",
             )
+            api.content.transition(obj=doc, transition="publish")
         commit()
 
         self.api_session = RelativeSession(self.portal_url)
         self.api_session.headers.update({"Accept": "application/json"})
         self.api_session.auth = (SITE_OWNER_NAME, SITE_OWNER_PASSWORD)
 
+        self.api_session_anon = RelativeSession(self.portal_url)
+        self.api_session_anon.headers.update({"Accept": "application/json"})
+
     def tearDown(self):
         self.api_session.close()
+        self.api_session_anon.close()
 
-    def test_search_b_size_default_to_500(self):
+    def test_search_b_size_not_limited_for_auth(self):
         response = self.api_session.get(
             "/@search", params={"portal_type": "Document", "b_size": 1000}
         )
         result = response.json()
-        self.assertEqual(len(result["items"]), self.MAX_LIMIT)
+        self.assertEqual(len(result["items"]), self.MAX_LIMIT + 1)
 
-    def test_querystringsearch_post_default_limit_500(self):
+    def test_querystringsearch_post_not_limited_for_auth(self):
         response = self.api_session.post(
             "/@querystring-search",
             json={
@@ -62,10 +68,56 @@ def test_querystringsearch_post_default_limit_500(self):
             },
         )
         result = response.json()
+        self.assertEqual(len(result["items"]), self.MAX_LIMIT + 1)
+        self.assertEqual(result["items_total"], self.MAX_LIMIT + 1)
+
+    def test_querystringsearch_get_not_limited_for_auth(self):
+        query = {
+            "query": [
+                {
+                    "i": "portal_type",
+                    "o": "plone.app.querystring.operation.selection.any",
+                    "v": ["Document"],
+                }
+            ],
+            "b_size": 2000,
+            "limit": 2000,
+        }
+        response = self.api_session.get(
+            f"/@querystring-search?query={quote(json.dumps(query))}",
+        )
+
+        result = response.json()
+        self.assertEqual(len(result["items"]), self.MAX_LIMIT + 1)
+        self.assertEqual(result["items_total"], self.MAX_LIMIT + 1)
+
+    def test_search_b_size_default_to_500_for_anon(self):
+        response = self.api_session_anon.get(
+            "/@search", params={"portal_type": "Document", "b_size": 1000}
+        )
+        result = response.json()
+        self.assertEqual(len(result["items"]), self.MAX_LIMIT)
+
+    def test_querystringsearch_post_default_limit_500_for_anon(self):
+        response = self.api_session_anon.post(
+            "/@querystring-search",
+            json={
+                "query": [
+                    {
+                        "i": "portal_type",
+                        "o": "plone.app.querystring.operation.selection.is",
+                        "v": ["Document"],
+                    }
+                ],
+                "limit": 2000,
+                "b_size": 2000,
+            },
+        )
+        result = response.json()
         self.assertEqual(len(result["items"]), self.MAX_LIMIT)
         self.assertEqual(result["items_total"], self.MAX_LIMIT)
 
-    def test_querystringsearch_get_default_limit_500(self):
+    def test_querystringsearch_get_default_limit_500_for_anon(self):
         query = {
             "query": [
                 {
@@ -77,7 +129,7 @@ def test_querystringsearch_get_default_limit_500(self):
             "b_size": 2000,
             "limit": 2000,
         }
-        response = self.api_session.get(
+        response = self.api_session_anon.get(
             f"/@querystring-search?query={quote(json.dumps(query))}",
         )
 
diff --git a/src/redturtle/volto/tests/test_content_types.py b/src/redturtle/volto/tests/test_content_types.py
index 9d1f7ed1..470195c8 100644
--- a/src/redturtle/volto/tests/test_content_types.py
+++ b/src/redturtle/volto/tests/test_content_types.py
@@ -1,16 +1,17 @@
 # -*- coding: utf-8 -*-
 """Setup tests for this package."""
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
+
 from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from redturtle.volto.testing import REDTURTLE_VOLTO_INTEGRATION_TESTING
 
-import unittest
-
 
 class TestContentTypes(unittest.TestCase):
     layer = REDTURTLE_VOLTO_INTEGRATION_TESTING
diff --git a/src/redturtle/volto/tests/test_controlpanel_api.py b/src/redturtle/volto/tests/test_controlpanel_api.py
index c2eb3704..2c2fcf2a 100644
--- a/src/redturtle/volto/tests/test_controlpanel_api.py
+++ b/src/redturtle/volto/tests/test_controlpanel_api.py
@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
-from plone.app.testing import setRoles
+import unittest
+
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class ControlpanelTest(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_ct_link.py b/src/redturtle/volto/tests/test_ct_link.py
index 5fb981c1..a199e4c5 100644
--- a/src/redturtle/volto/tests/test_ct_link.py
+++ b/src/redturtle/volto/tests/test_ct_link.py
@@ -1,15 +1,16 @@
 # -*- coding: utf-8 -*-
 """Setup tests for this package."""
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestContentTypeLink(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_dxfield_deserializer.py b/src/redturtle/volto/tests/test_dxfield_deserializer.py
new file mode 100644
index 00000000..3ada70b8
--- /dev/null
+++ b/src/redturtle/volto/tests/test_dxfield_deserializer.py
@@ -0,0 +1,105 @@
+import unittest
+
+import transaction
+from plone.app.testing import TEST_USER_ID
+from plone.app.testing import TEST_USER_NAME
+from plone.app.testing import login
+from plone.app.testing import setRoles
+from plone.dexterity.utils import iterSchemata
+from plone.restapi.interfaces import IFieldDeserializer
+from Products.CMFCore.utils import getToolByName
+from zope.component import getMultiAdapter
+
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
+
+
+class TestDXFieldDeserializer(unittest.TestCase):
+    layer = REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
+
+    def setUp(self):
+        self.app = self.layer["app"]
+        self.request = self.layer["request"]
+        self.portal = self.layer["portal"]
+
+        self.wftool = getToolByName(self.portal, "portal_workflow")
+        self.acl_users = getToolByName(self.portal, "acl_users")
+
+        self.acl_users.userFolderAddUser("user1", "secret", ["Manager"], [])
+        self.acl_users.getUser("user1")
+
+        login(self.portal, "user1")
+
+        # folders
+        self.portal.invokeFactory("Folder", id="folder", title="Private Folder")
+        self.portal.folder.invokeFactory(
+            "Folder", id="otherfolder", title="Other Folder"
+        )
+        self.wftool.doActionFor(self.portal.folder.otherfolder, "publish")
+
+        self.portal.invokeFactory("Document", id="doc1", title="Test Document")
+        self.wftool.doActionFor(self.portal.doc1, "publish")
+
+        transaction.commit()
+
+    def deserialize(self, fieldname, value):
+        for schema in iterSchemata(self.portal.doc1):
+            if fieldname in schema:
+                field = schema.get(fieldname)
+                break
+        deserializer = getMultiAdapter(
+            (field, self.portal.doc1, self.request), IFieldDeserializer
+        )
+        return deserializer(value)
+
+    def test_relationlist_deserialization_broke_with_path(self):
+        # documents
+        doc2 = self.portal.folder.otherfolder[
+            self.portal.folder.otherfolder.invokeFactory(
+                "Document", id="doc2", title="Referenceable Document"
+            )
+        ]
+        self.wftool.doActionFor(self.portal.folder.otherfolder.doc2, "publish")
+        doc3 = self.portal.folder.otherfolder[
+            self.portal.folder.otherfolder.invokeFactory(
+                "Document", id="doc3", title="Referenceable Document"
+            )
+        ]
+        self.wftool.doActionFor(self.portal.folder.otherfolder.doc3, "publish")
+
+        setRoles(self.portal, TEST_USER_ID, ["Member"])
+        login(self.portal, TEST_USER_NAME)
+
+        try:
+            value = self.deserialize(
+                "relatedItems",
+                [str(doc2.absolute_url_path()), str(doc3.absolute_url_path())],
+            )
+        except ValueError:
+            value = None
+
+        self.assertIsNone(value)
+
+    def test_relationlist_deserialization_correct_with_uid(self):
+        # documents
+        doc2 = self.portal.folder.otherfolder[
+            self.portal.folder.otherfolder.invokeFactory(
+                "Document", id="doc2", title="Referenceable Document"
+            )
+        ]
+        self.wftool.doActionFor(self.portal.folder.otherfolder.doc2, "publish")
+        doc3 = self.portal.folder.otherfolder[
+            self.portal.folder.otherfolder.invokeFactory(
+                "Document", id="doc3", title="Referenceable Document"
+            )
+        ]
+        self.wftool.doActionFor(self.portal.folder.otherfolder.doc3, "publish")
+
+        setRoles(self.portal, TEST_USER_ID, ["Member"])
+        login(self.portal, TEST_USER_NAME)
+
+        value = self.deserialize(
+            "relatedItems",
+            [str(doc2.UID()), str(doc3.UID())],
+        )
+
+        self.assertTrue(value)
diff --git a/src/redturtle/volto/tests/test_monkeypatches.py b/src/redturtle/volto/tests/test_monkeypatches.py
index a10ade03..4cf0264c 100644
--- a/src/redturtle/volto/tests/test_monkeypatches.py
+++ b/src/redturtle/volto/tests/test_monkeypatches.py
@@ -1,11 +1,12 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from Products.CMFPlone.interfaces import ISelectableConstrainTypes
-from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
 
 
 class TestRespectLocallyAllowedTypes(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_publication_fields_fixes.py b/src/redturtle/volto/tests/test_publication_fields_fixes.py
index 751ce255..40390024 100644
--- a/src/redturtle/volto/tests/test_publication_fields_fixes.py
+++ b/src/redturtle/volto/tests/test_publication_fields_fixes.py
@@ -1,17 +1,18 @@
 # -*- coding: utf-8 -*-
+import os
+import unittest
+
 from DateTime import DateTime
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.registry.interfaces import IRegistry
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 from zope.component import getUtility
 
-import os
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestPublicationFieldsFixes(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_resolveuid_re_patch.py b/src/redturtle/volto/tests/test_resolveuid_re_patch.py
index ec916706..bf9bb417 100644
--- a/src/redturtle/volto/tests/test_resolveuid_re_patch.py
+++ b/src/redturtle/volto/tests/test_resolveuid_re_patch.py
@@ -1,11 +1,12 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.serializer.utils import uid_to_url
-from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_FUNCTIONAL_TESTING
 
 
 class TestRESOLVEUIDREPatch(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_service_context_navigation.py b/src/redturtle/volto/tests/test_service_context_navigation.py
index 00fd7c60..a7406d5f 100644
--- a/src/redturtle/volto/tests/test_service_context_navigation.py
+++ b/src/redturtle/volto/tests/test_service_context_navigation.py
@@ -1,14 +1,15 @@
 # -*- coding: utf-8 -*-
+import unittest
+
+import transaction
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
-import transaction
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestServicesContextNavigation(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_service_sitemap.py b/src/redturtle/volto/tests/test_service_sitemap.py
index 0171dc29..4810a6d2 100644
--- a/src/redturtle/volto/tests/test_service_sitemap.py
+++ b/src/redturtle/volto/tests/test_service_sitemap.py
@@ -1,14 +1,15 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestServicesSitemap(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_setup.py b/src/redturtle/volto/tests/test_setup.py
index 3db707e9..8ebb38ef 100644
--- a/src/redturtle/volto/tests/test_setup.py
+++ b/src/redturtle/volto/tests/test_setup.py
@@ -1,12 +1,12 @@
 # -*- coding: utf-8 -*-
 """Setup tests for this package."""
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
-from redturtle.volto.testing import REDTURTLE_VOLTO_INTEGRATION_TESTING  # noqa: E501
-
-import unittest
+from plone.app.testing import setRoles
 
+from redturtle.volto.testing import REDTURTLE_VOLTO_INTEGRATION_TESTING  # noqa: E501
 
 try:
     from Products.CMFPlone.utils import get_installer
@@ -37,6 +37,7 @@ def test_product_installed(self):
     def test_browserlayer(self):
         """Test that IRedturtleVoltoLayer is registered."""
         from plone.browserlayer import utils
+
         from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
         self.assertIn(IRedturtleVoltoLayer, utils.registered_layers())
@@ -79,6 +80,7 @@ def test_product_uninstalled(self):
     def test_browserlayer_removed(self):
         """Test that IRedturtleVoltoLayer is removed."""
         from plone.browserlayer import utils
+
         from redturtle.volto.interfaces import IRedturtleVoltoLayer
 
         self.assertNotIn(IRedturtleVoltoLayer, utils.registered_layers())
diff --git a/src/redturtle/volto/tests/test_site_search.py b/src/redturtle/volto/tests/test_site_search.py
index b5f5b718..f06d5f57 100644
--- a/src/redturtle/volto/tests/test_site_search.py
+++ b/src/redturtle/volto/tests/test_site_search.py
@@ -1,17 +1,18 @@
 # -*- coding: utf-8 -*-
+import unittest
+
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.registry.interfaces import IRegistry
 from plone.restapi.testing import RelativeSession
 from Products.CMFPlone.interfaces import ISearchSchema
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 from transaction import commit
 from zope.component import getUtility
 
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class SiteSearchTest(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_summary_customization.py b/src/redturtle/volto/tests/test_summary_customization.py
index 535056a0..ee96e480 100644
--- a/src/redturtle/volto/tests/test_summary_customization.py
+++ b/src/redturtle/volto/tests/test_summary_customization.py
@@ -1,16 +1,17 @@
 # -*- coding: utf-8 -*-
+import os
+import unittest
+
+import transaction
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import SITE_OWNER_NAME
 from plone.app.testing import SITE_OWNER_PASSWORD
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.namedfile.file import NamedBlobImage
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
-import os
-import transaction
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestSummaryCustomization(unittest.TestCase):
diff --git a/src/redturtle/volto/tests/test_vocabulary_endpoint.py b/src/redturtle/volto/tests/test_vocabulary_endpoint.py
index 59634e88..a7825991 100644
--- a/src/redturtle/volto/tests/test_vocabulary_endpoint.py
+++ b/src/redturtle/volto/tests/test_vocabulary_endpoint.py
@@ -1,12 +1,13 @@
 # -*- coding: utf-8 -*-
+import unittest
+
+import transaction
 from plone import api
-from plone.app.testing import setRoles
 from plone.app.testing import TEST_USER_ID
+from plone.app.testing import setRoles
 from plone.restapi.testing import RelativeSession
-from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
-import transaction
-import unittest
+from redturtle.volto.testing import REDTURTLE_VOLTO_API_FUNCTIONAL_TESTING
 
 
 class TestVocabularyEndpoint(unittest.TestCase):
diff --git a/src/redturtle/volto/types/adapters.py b/src/redturtle/volto/types/adapters.py
index 286b6a53..d7e53883 100644
--- a/src/redturtle/volto/types/adapters.py
+++ b/src/redturtle/volto/types/adapters.py
@@ -2,14 +2,15 @@
 """JsonSchema providers."""
 from plone.restapi.types.adapters import TextLineJsonSchemaProvider as Base
 from plone.restapi.types.interfaces import IJsonSchemaProvider
-from redturtle.volto import _
-from redturtle.volto.interfaces import IRedturtleVoltoLayer
 from zope.component import adapter
 from zope.i18n import translate
-from zope.interface import implementer
 from zope.interface import Interface
+from zope.interface import implementer
 from zope.schema.interfaces import ITextLine
 
+from redturtle.volto import _
+from redturtle.volto.interfaces import IRedturtleVoltoLayer
+
 
 @adapter(ITextLine, Interface, IRedturtleVoltoLayer)
 @implementer(IJsonSchemaProvider)
diff --git a/src/redturtle/volto/upgrades.py b/src/redturtle/volto/upgrades.py
index 0858f351..726e832c 100644
--- a/src/redturtle/volto/upgrades.py
+++ b/src/redturtle/volto/upgrades.py
@@ -1,17 +1,16 @@
 # -*- coding: utf-8 -*-
-from Acquisition import aq_base
+import json
+import logging
 from copy import deepcopy
+from uuid import uuid4
+
+from Acquisition import aq_base
 from plone import api
 from plone.app.upgrade.utils import installOrReinstallProduct
 from plone.dexterity.utils import iterSchemata
 from plone.restapi.behaviors import IBlocks
-from uuid import uuid4
 from zope.schema import getFields
 
-import json
-import logging
-
-
 try:
     from collective.volto.blocksfield.field import BlocksField
 
@@ -464,3 +463,12 @@ def to_4200(context):
     logger.info("Add redturtle.volto controlpanel")
     update_registry(context)
     update_controlpanel(context)
+
+
+def to_4301(context):
+    brains = api.content.find(portal_type="Event")
+    logger.info("Reindexing {} Events".format(len(brains)))
+
+    for brain in brains:
+        event = brain.getObject()
+        event.reindexObject(idxs=["start"])
diff --git a/src/redturtle/volto/upgrades.zcml b/src/redturtle/volto/upgrades.zcml
index cb841fd3..2aa7f684 100644
--- a/src/redturtle/volto/upgrades.zcml
+++ b/src/redturtle/volto/upgrades.zcml
@@ -180,5 +180,22 @@
       handler=".upgrades.to_4200"
       />
 
+  <genericsetup:upgradeStep
+      title="Update robots"
+      description=""
+      profile="redturtle.volto:default"
+      source="4200"
+      destination="4300"
+      handler=".setuphandlers.upgrade_robots_txt"
+      />
+
+  <genericsetup:upgradeStep
+      title="Rendex start index"
+      description=""
+      profile="redturtle.volto:default"
+      source="4300"
+      destination="4301"
+      handler=".upgrades.to_4301"
+      />
 
 </configure>