Fix: Response not iterable on trigger expansion

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/triggers/__init__.py

@@ -322,7 +322,8 @@ def get_children_nodes(self, manager, **kwargs):
             sql = render_template("/".join(
                 [self.trigger_function_template_path, self._NODE_SQL]),
                 scid=trigger_function_schema_oid,
-                fnid=rset['rows'][0]['tfuncoid']
+                fnid=rset['rows'][0]['tfuncoid'],
+                conn=self.conn
             )
             status, res = self.conn.execute_2darray(sql)
             if not status:

web/pgadmin/browser/utils.py

@@ -343,6 +343,12 @@ def children(self, *args, **kwargs):
         """Build a list of treeview nodes from the child nodes."""
         children = self.get_children_nodes(*args, **kwargs)
 
+        # get_children_nodes may return a Flask Response (e.g. an error
+        # response) instead of a list of nodes. In that case return it as-is
+        # rather than trying to iterate/sort it.
+        if isinstance(children, flask.Response):
+            return children
+
         # Return sorted nodes based on label
         return make_json_response(
             data=sorted(
@@ -453,10 +459,18 @@ def children(self, **kwargs):
                 )
             )
 
+        children = self.get_children_nodes(manager, **kwargs)
+
+        # get_children_nodes may return a Flask Response (e.g. an error
+        # response) instead of a list of nodes. In that case return it as-is
+        # rather than trying to iterate/sort it.
+        if isinstance(children, flask.Response):
+            return children
+
         # Return sorted nodes based on label
         return make_json_response(
             data=sorted(
-                self.get_children_nodes(manager, **kwargs),
+                children,
                 key=lambda c: c['label']
             )
         )