diff options
Diffstat (limited to 'lib/sqlalchemy/orm/interfaces.py')
| -rw-r--r-- | lib/sqlalchemy/orm/interfaces.py | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/sqlalchemy/orm/interfaces.py b/lib/sqlalchemy/orm/interfaces.py index e94a81fed..704ce9df7 100644 --- a/lib/sqlalchemy/orm/interfaces.py +++ b/lib/sqlalchemy/orm/interfaces.py @@ -36,6 +36,8 @@ from .. import inspect from .. import inspection from .. import util from ..sql import operators +from ..sql import visitors +from ..sql.traversals import HasCacheKey __all__ = ( @@ -54,7 +56,9 @@ __all__ = ( ) -class MapperProperty(_MappedAttribute, InspectionAttr, util.MemoizedSlots): +class MapperProperty( + HasCacheKey, _MappedAttribute, InspectionAttr, util.MemoizedSlots +): """Represent a particular class attribute mapped by :class:`.Mapper`. The most common occurrences of :class:`.MapperProperty` are the @@ -74,6 +78,11 @@ class MapperProperty(_MappedAttribute, InspectionAttr, util.MemoizedSlots): "info", ) + _cache_key_traversal = [ + ("parent", visitors.ExtendedInternalTraversal.dp_has_cache_key), + ("key", visitors.ExtendedInternalTraversal.dp_string), + ] + cascade = frozenset() """The set of 'cascade' attribute names. @@ -647,7 +656,7 @@ class MapperOption(object): self.process_query(query) - def _generate_cache_key(self, path): + def _generate_path_cache_key(self, path): """Used by the "baked lazy loader" to see if this option can be cached. The "baked lazy loader" refers to the :class:`.Query` that is |