Fix an issue in ERD tool where SQL generated is missing columns for the table. #6920

web/pgadmin/browser/server_groups/servers/databases/schemas/tables/columns/utils.py

@@ -339,7 +339,7 @@ def parse_format_columns(data, mode=None):
         final_columns = []
 
         for c in columns:
-            if 'inheritedfrom' not in c:
+            if c.get('inheritedfrom', None) is None:
                 final_columns.append(c)
 
         # Now we have all lis of columns which we need