Convert legacy filters if used

integrations/elasticsearch/src/elasticsearch_haystack/document_store.py

@@ -12,6 +12,7 @@
 from haystack import default_from_dict, default_to_dict
 from haystack.dataclasses import Document
 from haystack.document_stores import document_store, DocumentStoreError, DuplicateDocumentError, DuplicatePolicy
+from haystack.utils.filters import convert
 
 from elasticsearch_haystack.filters import _normalize_filters
 
@@ -128,6 +129,9 @@ def _search_documents(self, **kwargs) -> List[Document]:
         return documents
 
     def filter_documents(self, filters: Optional[Dict[str, Any]] = None) -> List[Document]:
+        if "operator" not in filters and "conditions" not in filters:
+            filters = convert(filters)
+
         query = {"bool": {"filter": _normalize_filters(filters)}} if filters else None
         documents = self._search_documents(query=query)
         return documents