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nexedi
ZODB
Commits
df0ebdb6
Commit
df0ebdb6
authored
Oct 26, 2004
by
Fred Drake
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document _p_invalidate()
parent
8ff1520f
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src/persistent/interfaces.py
src/persistent/interfaces.py
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src/persistent/interfaces.py
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df0ebdb6
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@@ -140,7 +140,8 @@ class IPersistent(Interface):
- call _p_deactivate()
- set _p_changed to None
There is one way to invalidate an object: delete its _p_changed
There are two ways to invalidate an object: call the
_p_invalidate() method (preferred) or delete its _p_changed
attribute. This cannot be ignored, and is used when semantics
require invalidation. Normally, an invalidated object transitions
to the ghost state. However, some objects cannot be ghosts. When
...
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@@ -226,6 +227,15 @@ class IPersistent(Interface):
may choose to keep an object in the saved state.
"""
def
_p_invalidate
():
"""Invalidate the object.
Invalidate the object. This causes any data to be thrown
away, even if the object is inthe changed state. The object
is moved to the ghost state; further accesses will cause
object data to be reloaded.
"""
class
IPersistentNoReadConflicts
(
IPersistent
):
def
_p_independent
():
"""Hook for subclasses to prevent read conflict errors.
...
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