[v3-2-test] Fix task run context crash when DagRun state is expired (#66339)

airflow-core/src/airflow/api_fastapi/execution_api/datamodels/taskinstance.py

@@ -335,8 +335,11 @@ def safe_extract_from_orm(cls, data: Any) -> Any:
         for field_name in cls.model_fields:
             if field_name in insp.dict:
                 values[field_name] = insp.dict[field_name]
-            elif field_name == "state" and "_state" in insp.dict:
-                values["state"] = insp.dict["_state"]
+            elif field_name == "state":
+                if "_state" in insp.dict:
+                    values["state"] = insp.dict["_state"]
+                elif not insp.detached and (state_val := data._state) is not None:
+                    values["state"] = state_val
 
         if "consumed_asset_events" not in values:
             values["consumed_asset_events"] = []

airflow-core/tests/unit/cli/commands/test_task_command.py

@@ -307,6 +307,23 @@ def test_task_render_handles_detached_dagrun(self, dag_maker, session):
         with redirect_stdout(io.StringIO()):
             task_command.task_render(args)
 
+    @pytest.mark.db_test
+    def test_task_render_handles_expired_dagrun(self, dag_maker, session):
+        """Test that model_validate extracts state from an expired DagRun instance."""
+        from airflow.api_fastapi.execution_api.datamodels.taskinstance import DagRun as DagRunPydantic
+        from airflow.utils.state import DagRunState
+
+        with dag_maker(dag_id="test_expired", session=session):
+            pass
+
+        dr = dag_maker.create_dagrun(state=DagRunState.RUNNING)
+        session.commit()
+        # After commit, SQLAlchemy expires all attributes — _state is no longer in insp.dict
+        # but the instance is still attached, so direct access triggers a lazy reload.
+
+        pydantic_dr = DagRunPydantic.model_validate(dr)
+        assert pydantic_dr.state == DagRunState.RUNNING
+
     @pytest.mark.usefixtures("testing_dag_bundle")
     def test_mapped_task_render(self):
         """