fix(aci): Implement DataSource.normalize_before_relocation_import

src/sentry/monitors/models.py

@@ -814,6 +814,7 @@ class Meta:
 
 @data_source_type_registry.register(DATA_SOURCE_CRON_MONITOR)
 class CronMonitorDataSourceHandler(DataSourceTypeHandler[Monitor]):
+    @override
     @staticmethod
     def bulk_get_query_object(
         data_sources: list[DataSource],
@@ -834,6 +835,7 @@ def bulk_get_query_object(
         }
         return {ds.id: qs_lookup.get(ds.source_id) for ds in data_sources}
 
+    @override
     @staticmethod
     def related_model(instance) -> list[ModelRelation]:
         return [ModelRelation(Monitor, {"id": instance.source_id})]
@@ -848,3 +850,8 @@ def get_instance_limit(org: Organization) -> int | None:
     def get_current_instance_count(org: Organization) -> int:
         # We don't have a limit at the moment, so no need to count.
         raise NotImplementedError
+
+    @override
+    @staticmethod
+    def get_relocation_model_name() -> str:
+        return "monitors.monitor"

src/sentry/snuba/models.py

@@ -182,6 +182,7 @@ def write_relocation_import(
 
 @data_source_type_registry.register(DATA_SOURCE_SNUBA_QUERY_SUBSCRIPTION)
 class QuerySubscriptionDataSourceHandler(DataSourceTypeHandler[QuerySubscription]):
+    @override
     @staticmethod
     def bulk_get_query_object(
         data_sources: list[DataSource],
@@ -203,6 +204,7 @@ def bulk_get_query_object(
         }
         return {ds.id: qs_lookup.get(ds.source_id) for ds in data_sources}
 
+    @override
     @staticmethod
     def related_model(instance) -> list[ModelRelation]:
         return [ModelRelation(QuerySubscription, {"id": instance.source_id})]
@@ -223,3 +225,8 @@ def get_current_instance_count(org: Organization) -> int:
                 QuerySubscription.Status.UPDATING.value,
             ),
         ).count()
+
+    @override
+    @staticmethod
+    def get_relocation_model_name() -> str:
+        return "sentry.querysubscription"

src/sentry/uptime/models.py

@@ -186,6 +186,7 @@ class UptimeRegionScheduleMode(enum.StrEnum):
 
 @data_source_type_registry.register(DATA_SOURCE_UPTIME_SUBSCRIPTION)
 class UptimeSubscriptionDataSourceHandler(DataSourceTypeHandler[UptimeSubscription]):
+    @override
     @staticmethod
     def bulk_get_query_object(
         data_sources: list[DataSource],
@@ -210,6 +211,7 @@ def bulk_get_query_object(
         }
         return {ds.id: qs_lookup.get(ds.source_id) for ds in data_sources}
 
+    @override
     @staticmethod
     def related_model(instance) -> list[ModelRelation]:
         return [ModelRelation(UptimeSubscription, {"id": instance.source_id})]
@@ -225,6 +227,11 @@ def get_current_instance_count(org: Organization) -> int:
         # We don't have a limit at the moment, so no need to count.
         raise NotImplementedError
 
+    @override
+    @staticmethod
+    def get_relocation_model_name() -> str:
+        return "uptime.uptimesubscription"
+
 
 def get_detector(uptime_subscription: UptimeSubscription, prefetch_workflow_data=False) -> Detector:
     """

src/sentry/workflow_engine/models/data_source.py

@@ -1,18 +1,23 @@
 import builtins
 import dataclasses
+import logging
 from typing import Generic, TypeVar
 
 from django.db import models
 from django.db.models.signals import pre_save
 from django.dispatch import receiver
 
-from sentry.backup.scopes import RelocationScope
+from sentry.backup.dependencies import NormalizedModelName, PrimaryKeyMap
+from sentry.backup.helpers import ImportFlags
+from sentry.backup.scopes import ImportScope, RelocationScope
 from sentry.db.models import DefaultFieldsModel, FlexibleForeignKey, region_silo_model
 from sentry.utils.registry import NoRegistrationExistsError
 from sentry.workflow_engine.models.data_source_detector import DataSourceDetector
 from sentry.workflow_engine.registry import data_source_type_registry
 from sentry.workflow_engine.types import DataSourceTypeHandler
 
+logger = logging.getLogger(__name__)
+
 T = TypeVar("T")
 
 
@@ -25,6 +30,13 @@ class DataPacket(Generic[T]):
 @region_silo_model
 class DataSource(DefaultFieldsModel):
     __relocation_scope__ = RelocationScope.Organization
+    # DataSource.source_id dynamically references different models based on the 'type' field.
+    # We declare all possible dependencies here to ensure proper import ordering.
+    __relocation_dependencies__ = {
+        "monitors.monitor",  # For DATA_SOURCE_CRON_MONITOR
+        "sentry.querysubscription",  # For DATA_SOURCE_SNUBA_QUERY_SUBSCRIPTION
+        "uptime.uptimesubscription",  # For DATA_SOURCE_UPTIME_SUBSCRIPTION
+    }
 
     organization = FlexibleForeignKey("sentry.Organization")
 
@@ -49,6 +61,43 @@ def type_handler(self) -> builtins.type[DataSourceTypeHandler]:
             raise ValueError(f"Unknown data source type: {self.type}")
         return handler
 
+    def normalize_before_relocation_import(
+        self, pk_map: PrimaryKeyMap, scope: ImportScope, flags: ImportFlags
+    ) -> int | None:
+        old_pk = super().normalize_before_relocation_import(pk_map, scope, flags)
+        if old_pk is None:
+            return None
+
+        # Map source_id based on the data source type
+        try:
+            handler = data_source_type_registry.get(self.type)
+            model_name = NormalizedModelName(handler.get_relocation_model_name())
+            old_source_id = int(self.source_id)
+            new_source_id = pk_map.get_pk(model_name, old_source_id)
+
+            if new_source_id is not None:
+                self.source_id = str(new_source_id)
+            else:
+                # Referenced model not in pk_map. This may be correct (reset_pks=False) or broken
+                # (reset_pks=True but referenced model was filtered out or failed to import).
+                logger.warning(
+                    "DataSource source_id not remapped - referenced model not in pk_map",
+                    extra={
+                        "data_source_id": old_pk,
+                        "type": self.type,
+                        "source_id": old_source_id,
+                        "model": str(model_name),
+                    },
+                )
+        except Exception:
+            logger.exception(
+                "DataSource.normalize_before_relocation_import failed",
+                extra={"data_source_id": old_pk, "type": self.type, "source_id": self.source_id},
+            )
+            return None
+
+        return old_pk
+
 
 @receiver(pre_save, sender=DataSource)
 def ensure_type_handler_registered(sender, instance: DataSource, **kwargs):

src/sentry/workflow_engine/types.py

@@ -108,8 +108,9 @@ def execute(event_data: WorkflowEventData, action: Action, detector: Detector) -
         raise NotImplementedError
 
 
-class DataSourceTypeHandler(Generic[T]):
+class DataSourceTypeHandler(ABC, Generic[T]):
     @staticmethod
+    @abstractmethod
     def bulk_get_query_object(data_sources) -> dict[int, T | None]:
         """
         Bulk fetch related data-source models returning a dict of the
@@ -118,6 +119,7 @@ def bulk_get_query_object(data_sources) -> dict[int, T | None]:
         raise NotImplementedError
 
     @staticmethod
+    @abstractmethod
     def related_model(instance) -> list[ModelRelation]:
         """
         A list of deletion ModelRelations. The model relation query should map
@@ -127,6 +129,7 @@ def related_model(instance) -> list[ModelRelation]:
         raise NotImplementedError
 
     @staticmethod
+    @abstractmethod
     def get_instance_limit(org: Organization) -> int | None:
         """
         Returns the maximum number of instances of this data source type for the organization.
@@ -135,13 +138,24 @@ def get_instance_limit(org: Organization) -> int | None:
         raise NotImplementedError
 
     @staticmethod
+    @abstractmethod
     def get_current_instance_count(org: Organization) -> int:
         """
         Returns the current number of instances of this data source type for the organization.
         Only called if `get_instance_limit` returns a number >0
         """
         raise NotImplementedError
 
+    @staticmethod
+    @abstractmethod
+    def get_relocation_model_name() -> str:
+        """
+        Returns the normalized model name (e.g., "sentry.querysubscription") for the model that
+        source_id references. This is used during backup/relocation to map old PKs to new PKs.
+        The format is "app_label.model_name" in lowercase.
+        """
+        raise NotImplementedError
+
 
 class DataConditionHandler(Generic[T]):
     class Group(StrEnum):

tests/sentry/workflow_engine/models/test_data_source.py

@@ -2,6 +2,10 @@
 
 import pytest
 
+from sentry.backup.dependencies import ImportKind, NormalizedModelName, PrimaryKeyMap
+from sentry.backup.helpers import ImportFlags
+from sentry.backup.scopes import ImportScope
+from sentry.monitors.types import DATA_SOURCE_CRON_MONITOR
 from sentry.workflow_engine.registry import data_source_type_registry
 from tests.sentry.workflow_engine.test_base import BaseWorkflowTest
 
@@ -18,3 +22,73 @@ def test_data_source_valid_type(self) -> None:
         data_source = self.create_data_source(type="test")
         assert data_source is not None
         assert data_source.type == "test"
+
+    def test_normalize_before_relocation_import(self) -> None:
+        """Test that normalize_before_relocation_import correctly maps source_id"""
+        monitor = self.create_monitor(project=self.project)
+        data_source = self.create_data_source(
+            type=DATA_SOURCE_CRON_MONITOR,
+            source_id=str(monitor.id),
+            organization_id=self.organization.id,
+        )
+
+        old_monitor_pk = monitor.id
+        new_monitor_pk = 9999
+        old_data_source_id = data_source.id
+        old_org_id = data_source.organization_id
+
+        # Create a PrimaryKeyMap that maps the old monitor ID to a new one
+        pk_map = PrimaryKeyMap()
+        pk_map.insert(
+            model_name=NormalizedModelName("monitors.monitor"),
+            old=old_monitor_pk,
+            new=new_monitor_pk,
+            kind=ImportKind.Inserted,
+        )
+        pk_map.insert(
+            model_name=NormalizedModelName("sentry.organization"),
+            old=old_org_id,
+            new=old_org_id,
+            kind=ImportKind.Inserted,
+        )
+
+        old_data_source_pk = data_source.normalize_before_relocation_import(
+            pk_map, ImportScope.Organization, ImportFlags()
+        )
+
+        assert (
+            old_data_source_pk == old_data_source_id
+        ), f"Expected {old_data_source_id}, got {old_data_source_pk}"
+        assert data_source.source_id == str(new_monitor_pk)
+        assert data_source.pk is None
+
+    def test_normalize_before_relocation_import_missing_source(self) -> None:
+        """Test that normalize_before_relocation_import succeeds but doesn't update source_id if mapping not found"""
+        monitor = self.create_monitor(project=self.project)
+        data_source = self.create_data_source(
+            type=DATA_SOURCE_CRON_MONITOR,
+            source_id=str(monitor.id),
+            organization_id=self.organization.id,
+        )
+
+        old_source_id = data_source.source_id
+        old_data_source_id = data_source.id
+        old_org_id = data_source.organization_id
+
+        # Create a PrimaryKeyMap without the monitor mapping
+        pk_map = PrimaryKeyMap()
+        pk_map.insert(
+            model_name=NormalizedModelName("sentry.organization"),
+            old=old_org_id,
+            new=old_org_id,
+            kind=ImportKind.Inserted,
+        )
+
+        result = data_source.normalize_before_relocation_import(
+            pk_map, ImportScope.Organization, ImportFlags()
+        )
+
+        # Should succeed but leave source_id unchanged
+        assert result == old_data_source_id
+        assert data_source.source_id == old_source_id
+        assert data_source.pk is None