diff options
Diffstat (limited to 'lib/sqlalchemy/orm/decl_base.py')
| -rw-r--r-- | lib/sqlalchemy/orm/decl_base.py | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/lib/sqlalchemy/orm/decl_base.py b/lib/sqlalchemy/orm/decl_base.py index 3fb8af80c..804d05ce1 100644 --- a/lib/sqlalchemy/orm/decl_base.py +++ b/lib/sqlalchemy/orm/decl_base.py @@ -161,7 +161,13 @@ def _check_declared_props_nocascade(obj, name, cls): class _MapperConfig: - __slots__ = ("cls", "classname", "properties", "declared_attr_reg") + __slots__ = ( + "cls", + "classname", + "properties", + "declared_attr_reg", + "__weakref__", + ) @classmethod def setup_mapping(cls, registry, cls_, dict_, table, mapper_kw): @@ -311,13 +317,15 @@ class _ClassScanMapperConfig(_MapperConfig): mapper_kw, ): + # grab class dict before the instrumentation manager has been added. + # reduces cycles + self.clsdict_view = ( + util.immutabledict(dict_) if dict_ else util.EMPTY_DICT + ) super(_ClassScanMapperConfig, self).__init__(registry, cls_, mapper_kw) self.registry = registry self.persist_selectable = None - self.clsdict_view = ( - util.immutabledict(dict_) if dict_ else util.EMPTY_DICT - ) self.collected_attributes = {} self.collected_annotations: Dict[str, Tuple[Any, bool]] = {} self.declared_columns = util.OrderedSet() |