Edits.

Author: WaVEV

django_mongodb/compiler.py

@@ -39,9 +39,8 @@ def _get_group_alias_column(self, expr, annotation_group_idx):
             col = expr
         else:
             alias = f"__annotation_group{next(annotation_group_idx)}"
-            col_expr = self._get_column_from_expression(expr, alias)
-            replacement = col_expr
-            col = col_expr
+            col = self._get_column_from_expression(expr, alias)
+            replacement = col
         if self.collection_name == col.alias:
             return col.target.column, replacement
         return f"{col.alias}{self.GROUP_SEPARATOR}{col.target.column}", replacement
@@ -349,7 +348,6 @@ def build_query(self, columns=None):
         query.project_fields = self.get_project_fields(columns, ordering=query.ordering)
         try:
             where = self.get_where()
-            # where = getattr(self, "where", self.query.where)
             query.mongo_query = (
                 {"$expr": where.as_mql(self, self.connection)} if where is not None else {}
             )