ref(explorer): use sentry cursor pagination for runs endpoint

src/sentry/seer/endpoints/organization_seer_explorer_runs.py

@@ -1,10 +1,10 @@
 from __future__ import annotations
 
 import logging
+from typing import Any
 
 import orjson
 from django.conf import settings
-from rest_framework import serializers
 from rest_framework.request import Request
 from rest_framework.response import Response
 
@@ -13,6 +13,7 @@
 from sentry.api.api_publish_status import ApiPublishStatus
 from sentry.api.base import region_silo_endpoint
 from sentry.api.bases.organization import OrganizationEndpoint, OrganizationPermission
+from sentry.api.paginator import GenericOffsetPaginator
 from sentry.models.organization import Organization
 from sentry.net.http import connection_from_url
 from sentry.seer.seer_setup import has_seer_access_with_detail
@@ -29,21 +30,6 @@ class OrganizationSeerExplorerRunsPermission(OrganizationPermission):
     }
 
 
-class ExplorerRunsRequestSerializer(serializers.Serializer):
-    offset = serializers.IntegerField(required=False, allow_null=False)
-    limit = serializers.IntegerField(required=False, allow_null=False)
-
-    def validate_offset(self, value: int) -> int:
-        if value < 0:
-            raise serializers.ValidationError("Offset must be non-negative")
-        return value
-
-    def validate_limit(self, value: int) -> int:
-        if value < 1:
-            raise serializers.ValidationError("Limit must be greater than 0")
-        return value
-
-
 @region_silo_endpoint
 class OrganizationSeerExplorerRunsEndpoint(OrganizationEndpoint):
     publish_status = {
@@ -72,34 +58,26 @@ def get(self, request: Request, organization: Organization) -> Response:
                 status=403,
             )
 
-        serializer = ExplorerRunsRequestSerializer(data=request.GET)
-        if not serializer.is_valid():
-            return Response(serializer.errors, status=400)
-
-        offset: int | None = serializer.validated_data.get("offset")
-        limit: int | None = serializer.validated_data.get("limit")
-
-        path = "/v1/automation/explorer/runs"
-        body = orjson.dumps(
-            {
-                "organization_id": organization.id,
-                "user_id": request.user.id,
-                "offset": offset,
-                "limit": limit,
-            },
-            option=orjson.OPT_NON_STR_KEYS,
-        )
-
-        response = make_signed_seer_api_request(autofix_connection_pool, path, body)
-        if response.status < 200 or response.status >= 300:
-            logger.error(
-                "Seer explorer runs endpoint failed",
-                extra={
-                    "path": path,
-                    "status_code": response.status,
-                    "response_data": response.data,
+        def make_seer_runs_request(offset: int, limit: int) -> dict[str, Any]:
+            path = "/v1/automation/explorer/runs"
+            body = orjson.dumps(
+                {
+                    "organization_id": organization.id,
+                    "user_id": request.user.id,
+                    "offset": offset,
+                    "limit": limit,
                 },
+                option=orjson.OPT_NON_STR_KEYS,
             )
-            return Response({"detail": "Internal Server Error"}, status=502)
 
-        return Response(response.json(), status=response.status)
+            response = make_signed_seer_api_request(autofix_connection_pool, path, body)
+            if response.status < 200 or response.status >= 300:
+                raise Exception(f"Seer explorer runs endpoint failed with status {response.status}")
+
+            return response.json()
+
+        return self.paginate(
+            request=request,
+            paginator=GenericOffsetPaginator(data_fn=make_seer_runs_request),
+            default_per_page=100,
+        )

tests/sentry/seer/endpoints/test_organization_seer_explorer_runs.py

@@ -5,6 +5,7 @@
 
 from sentry.testutils.cases import APITestCase
 from sentry.testutils.helpers.features import with_feature
+from sentry.utils.cursors import Cursor
 
 
 @with_feature("organizations:seer-explorer")
@@ -35,11 +36,11 @@ def tearDown(self) -> None:
     def test_get_simple(self) -> None:
         self.make_seer_request.return_value.status = 200
         self.make_seer_request.return_value.json.return_value = {
-            "hello": "world",
+            "data": [{"run_id": "1"}, {"run_id": "2"}],
         }
         response = self.client.get(self.url)
         assert response.status_code == 200
-        assert response.json() == {"hello": "world"}
+        assert response.json()["data"] == [{"run_id": "1"}, {"run_id": "2"}]
 
         self.make_seer_request.assert_called_once()
         call_args = self.make_seer_request.call_args
@@ -48,18 +49,21 @@ def test_get_simple(self) -> None:
         assert body_json == {
             "organization_id": self.organization.id,
             "user_id": self.user.id,
-            "limit": None,
-            "offset": None,
+            "limit": 101,  # Default per_page of 100 + 1 for has_more
+            "offset": 0,
         }
 
-    def test_get_with_offset_and_limit(self) -> None:
+    def test_get_cursor_pagination(self) -> None:
         self.make_seer_request.return_value.status = 200
+        # Mock seer response for offset 0, limit 3.
         self.make_seer_request.return_value.json.return_value = {
-            "hello": "world",
+            "data": [{"run_id": "1"}, {"run_id": "2"}, {"run_id": "3"}],
         }
-        response = self.client.get(self.url + "?offset=1&limit=11")
+        cursor = str(Cursor(0, 0))
+        response = self.client.get(self.url + f"?per_page=2&cursor={cursor}")
         assert response.status_code == 200
-        assert response.json() == {"hello": "world"}
+        assert response.json()["data"] == [{"run_id": "1"}, {"run_id": "2"}]
+        assert 'rel="next"; results="true"' in response.headers["Link"]
 
         self.make_seer_request.assert_called_once()
         call_args = self.make_seer_request.call_args
@@ -68,26 +72,34 @@ def test_get_with_offset_and_limit(self) -> None:
         assert body_json == {
             "organization_id": self.organization.id,
             "user_id": self.user.id,
-            "limit": 11,
-            "offset": 1,
+            "limit": 3,  # +1 for has_more
+            "offset": 0,
         }
 
-    def test_get_with_invalid_limit(self) -> None:
-        for value in ["invalid", "-1", "0"]:
-            response = self.client.get(self.url + f"?limit={value}")
-            assert response.status_code == 400
-            assert "limit" in response.json()
+        # Second page - mock seer response for offset 2, limit 3.
+        self.make_seer_request.return_value.json.return_value = {
+            "data": [{"run_id": "3"}, {"run_id": "4"}],
+        }
+        cursor = str(Cursor(0, 2))
+        response = self.client.get(self.url + f"?per_page=2&cursor={cursor}")
+        assert response.status_code == 200
+        assert response.json()["data"] == [{"run_id": "3"}, {"run_id": "4"}]
+        assert 'rel="next"; results="false"' in response.headers["Link"]
 
-    def test_get_with_invalid_offset(self) -> None:
-        for value in ["invalid", "-1"]:
-            response = self.client.get(self.url + f"?offset={value}")
-            assert response.status_code == 400
-            assert "offset" in response.json()
+        call_args = self.make_seer_request.call_args
+        assert call_args[0][1] == "/v1/automation/explorer/runs"
+        body_json = orjson.loads(call_args[0][2])
+        assert body_json == {
+            "organization_id": self.organization.id,
+            "user_id": self.user.id,
+            "limit": 3,  # +1 for has_more
+            "offset": 2,
+        }
 
     def test_get_with_seer_error(self) -> None:
-        self.make_seer_request.return_value.status = 500
+        self.make_seer_request.return_value.status = 404
         response = self.client.get(self.url)
-        assert response.status_code == 502
+        assert response.status_code == 500
 
 
 class TestOrganizationSeerExplorerRunsEndpointFeatureFlags(APITestCase):