def unrelateOnDeletion(event):
"""Remove all relationships when an object is deleted."""
if not IObjectRemovedEvent.providedBy(event):
return
linkset = IRelationshipLinks(event.object, None)
if linkset is not None:
# event.object may be a ContainedProxy
unrelateAll(getProxiedObject(event.object))
def unrelateCalendarOnDeletion(event):
"""When you delete an object, relationships of it's calendar should be removed
>>> from schooltool.relationship.tests import setUp, tearDown
>>> from schooltool.testing.setup import setUpCalendaring
>>> setUp()
>>> setUpCalendaring()
>>> import zope.event
>>> old_subscribers = zope.event.subscribers[:]
>>> from schooltool.app.overlay import unrelateCalendarOnDeletion
>>> zope.event.subscribers.append(unrelateCalendarOnDeletion)
We will need some object that implements IHaveCalendar for that:
>>> from zope.container.btree import BTreeContainer
>>> container = BTreeContainer()
>>> from schooltool.person.person import Person
>>> container = BTreeContainer()
>>> container['jonas'] = jonas = Person(username="******")
>>> container['petras'] = petras = Person(username="******")
Let's add calendar of Petras to the list of overlaid calendars:
>>> jonas.overlaid_calendars.add(ISchoolToolCalendar(petras))
<...CalendarOverlayInfo object at ...>
>>> list(jonas.overlaid_calendars)
[<schooltool.app.overlay.CalendarOverlayInfo object at ...>]
If we delete Petras - Jonas should have no calendars in his overlay list:
>>> del container['petras']
>>> list(jonas.overlaid_calendars)
[]
Restore old subscribers:
>>> zope.event.subscribers[:] = old_subscribers
>>> tearDown()
"""
if not IObjectRemovedEvent.providedBy(event):
return
# event.object may be a ContainedProxy
obj = getProxiedObject(event.object)
if not IHaveCalendar.providedBy(obj):
return
calendar = ISchoolToolCalendar(obj)
linkset = IRelationshipLinks(calendar, None)
if linkset is not None:
unrelateAll(calendar)
def unrelateCalendarOnDeletion(event):
"""When you delete an object, relationships of it's calendar should be removed
>>> from schooltool.relationship.tests import setUp, tearDown
>>> from schooltool.testing.setup import setUpCalendaring
>>> setUp()
>>> setUpCalendaring()
>>> import zope.event
>>> old_subscribers = zope.event.subscribers[:]
>>> from schooltool.app.overlay import unrelateCalendarOnDeletion
>>> zope.event.subscribers.append(unrelateCalendarOnDeletion)
We will need some object that implements IHaveCalendar for that:
>>> from zope.container.btree import BTreeContainer
>>> container = BTreeContainer()
>>> from schooltool.person.person import Person
>>> container = BTreeContainer()
>>> container['jonas'] = jonas = Person(username="******")
>>> container['petras'] = petras = Person(username="******")
Let's add calendar of Petras to the list of overlaid calendars:
>>> jonas.overlaid_calendars.add(ISchoolToolCalendar(petras))
<...CalendarOverlayInfo object at ...>
>>> list(jonas.overlaid_calendars)
[<schooltool.app.overlay.CalendarOverlayInfo object at ...>]
If we delete Petras - Jonas should have no calendars in his overlay list:
>>> del container['petras']
>>> list(jonas.overlaid_calendars)
[]
Restore old subscribers:
>>> zope.event.subscribers[:] = old_subscribers
>>> tearDown()
"""
if not IObjectRemovedEvent.providedBy(event):
return
# event.object may be a ContainedProxy
obj = getProxiedObject(event.object)
if not IHaveCalendar.providedBy(obj):
return
calendar = ISchoolToolCalendar(obj)
linkset = IRelationshipLinks(calendar, None)
if linkset is not None:
unrelateAll(calendar)
