diff options
Diffstat (limited to 'lib/sqlalchemy')
| -rw-r--r-- | lib/sqlalchemy/orm/attributes.py | 6 | ||||
| -rw-r--r-- | lib/sqlalchemy/orm/state.py | 2 | ||||
| -rw-r--r-- | lib/sqlalchemy/orm/strategies.py | 1 |
3 files changed, 9 insertions, 0 deletions
diff --git a/lib/sqlalchemy/orm/attributes.py b/lib/sqlalchemy/orm/attributes.py index e78973459..6071b565d 100644 --- a/lib/sqlalchemy/orm/attributes.py +++ b/lib/sqlalchemy/orm/attributes.py @@ -370,6 +370,7 @@ class AttributeImpl(object): callable_, dispatch, trackparent=False, extension=None, compare_function=None, active_history=False, parent_token=None, expire_missing=True, + send_modified_events=True, **kwargs): """Construct an AttributeImpl. @@ -413,6 +414,10 @@ class AttributeImpl(object): during state.expire_attributes(None), if no value is present for this key. + send_modified_events + if False, the InstanceState._modified_event method will have no effect; + this means the attribute will never show up as changed in a + history entry. """ self.class_ = class_ self.key = key @@ -420,6 +425,7 @@ class AttributeImpl(object): self.dispatch = dispatch self.trackparent = trackparent self.parent_token = parent_token or self + self.send_modified_events = send_modified_events if compare_function is None: self.is_equal = operator.eq else: diff --git a/lib/sqlalchemy/orm/state.py b/lib/sqlalchemy/orm/state.py index 957e29700..ddd991acc 100644 --- a/lib/sqlalchemy/orm/state.py +++ b/lib/sqlalchemy/orm/state.py @@ -415,6 +415,8 @@ class InstanceState(interfaces._InspectionAttr): return None def _modified_event(self, dict_, attr, previous, collection=False): + if not attr.send_modified_events: + return if attr.key not in self.committed_state: if collection: if previous is NEVER_SET: diff --git a/lib/sqlalchemy/orm/strategies.py b/lib/sqlalchemy/orm/strategies.py index 009bf74a4..b04338d9c 100644 --- a/lib/sqlalchemy/orm/strategies.py +++ b/lib/sqlalchemy/orm/strategies.py @@ -80,6 +80,7 @@ def _register_attribute(strategy, mapper, useobject, callable_=callable_, active_history=active_history, impl_class=impl_class, + send_modified_events=not useobject or not prop.viewonly, doc=prop.doc, **kw ) |