fix: avoid 500 errors with SQLLAB_BACKEND_PERSISTENCE

superset/views/sql_lab/views.py

@@ -161,6 +161,12 @@ def put(self, tab_state_id: int) -> FlaskResponse:
             return Response(status=403)
 
         fields = {k: json.loads(v) for k, v in request.form.to_dict().items()}
+        if client_id := fields.get("latest_query_id"):
+            query = db.session.query(Query).filter_by(client_id=client_id).one_or_none()
+            if not query:
+                return self.json_response(
+                    {"error": f"Unknown client_id: {client_id}"}, status=400
+                )
         db.session.query(TabState).filter_by(id=tab_state_id).update(fields)
         db.session.commit()
         return json_success(json.dumps(tab_state_id))

tests/integration_tests/core_tests.py

@@ -996,6 +996,41 @@ def test_tabstate_with_name(self):
 
         self.assertEqual(payload["label"], "Untitled Query foo")
 
+    def test_tabstate_update(self):
+        username = "admin"
+        self.login(username)
+        # create a tab
+        data = {
+            "queryEditor": json.dumps(
+                {
+                    "name": "Untitled Query foo",
+                    "dbId": 1,
+                    "schema": None,
+                    "autorun": False,
+                    "sql": "SELECT ...",
+                    "queryLimit": 1000,
+                }
+            )
+        }
+        resp = self.get_json_resp("/tabstateview/", data=data)
+        tab_state_id = resp["id"]
+        # update tab state with non-existing client_id
+        client_id = "asdfasdf"
+        data = {"sql": json.dumps("select 1"), "latest_query_id": json.dumps(client_id)}
+        response = self.client.put(f"/tabstateview/{tab_state_id}", data=data)
+        self.assertEqual(response.status_code, 400)
+        self.assertEqual(response.json["error"], f"Unknown client_id: {client_id}")
+        # generate query
+        db.session.add(Query(client_id=client_id, database_id=1))
+        db.session.commit()
+        # update tab state with a valid client_id
+        response = self.client.put(f"/tabstateview/{tab_state_id}", data=data)
+        self.assertEqual(response.status_code, 200)
+        # nulls should be ok too
+        data["latest_query_id"] = "null"
+        response = self.client.put(f"/tabstateview/{tab_state_id}", data=data)
+        self.assertEqual(response.status_code, 200)
+
     def test_virtual_table_explore_visibility(self):
         # test that default visibility it set to True
         database = superset.utils.database.get_example_database()