diff --git a/src/datasource_sqlalchemy/forestadmin/datasource_sqlalchemy/collections.py b/src/datasource_sqlalchemy/forestadmin/datasource_sqlalchemy/collections.py
index 8b6f90b87..82e18b499 100644
--- a/src/datasource_sqlalchemy/forestadmin/datasource_sqlalchemy/collections.py
+++ b/src/datasource_sqlalchemy/forestadmin/datasource_sqlalchemy/collections.py
@@ -31,6 +31,7 @@
 from forestadmin.datasource_toolkit.interfaces.query.filter.unpaginated import Filter
 from forestadmin.datasource_toolkit.interfaces.query.projections import Projection
 from forestadmin.datasource_toolkit.interfaces.records import RecordsDataAlias
+from forestadmin.datasource_toolkit.utils.collections import CollectionUtils
 from sqlalchemy import Table
 from sqlalchemy import column as SqlAlchemyColumn
 from sqlalchemy import text
@@ -207,7 +208,7 @@ async def update(self, caller: User, filter_: Optional[Filter], patch: RecordsDa
 
     def _cast_condition_tree(self, tree: ConditionTree) -> ConditionTree:
         if isinstance(tree, ConditionTreeLeaf):
-            if cast(Column, self.schema["fields"][tree.field])["column_type"] == PrimitiveType.DATE:
+            if cast(Column, CollectionUtils.get_field_schema(self, tree.field))["column_type"] == PrimitiveType.DATE:
                 iso_format = tree.value
                 if isinstance(iso_format, str):
                     if iso_format[-1] == "Z":
diff --git a/src/datasource_sqlalchemy/tests/test_sqlalchemy_collections.py b/src/datasource_sqlalchemy/tests/test_sqlalchemy_collections.py
index 3cb794b98..7397a5455 100644
--- a/src/datasource_sqlalchemy/tests/test_sqlalchemy_collections.py
+++ b/src/datasource_sqlalchemy/tests/test_sqlalchemy_collections.py
@@ -243,6 +243,17 @@ def test_list_filter_in_and_not_in_with_null_in_values_should_work(self):
         self.assertEqual(len(results), 1)
         self.assertEqual(results[0]["id"], 1)
 
+    def test_list_filter_relation(self):
+        collection = self.datasource.get_collection("order")
+        filter_ = PaginatedFilter({"condition_tree": ConditionTreeLeaf("customer:id", Operator.IN, [1, None])})
+
+        results = self.loop.run_until_complete(
+            collection.list(self.mocked_caller, filter_, Projection("id", "customer:id"))
+        )
+
+        self.assertEqual(len(results), 1)
+        self.assertEqual(results[0]["customer"]["id"], 1)
+
     def test_create(self):
         order = {
             "id": 11,