add aliases to test prefetch_related

ormar/models/modelproxy.py

@@ -236,9 +236,7 @@ class ModelTableProxy:
 
     @staticmethod
     def _populate_pk_column(
-        model: Type["Model"],
-        columns: List[str],
-        use_alias: bool = False,
+        model: Type["Model"], columns: List[str], use_alias: bool = False,
     ) -> List[str]:
         pk_alias = (
             model.get_column_alias(model.Meta.pkname)

ormar/queryset/prefetch_query.py

@@ -385,6 +385,7 @@ class PrefetchQuery:
             instance = self._populate_nested_related(
                 model=instance, prefetch_dict=prefetch_dict,
             )
+            field_db_name = target_model.get_column_alias(field_name)
             self.already_extracted[target_model.get_name()].setdefault(
                 field_name, dict()
-            ).setdefault(row[field_name], []).append(instance)
+            ).setdefault(row[field_db_name], []).append(instance)