[hooks/syncschema] only call "ALTER TABLE" once when changing a size constraint
Until now we would:
- remove the old size constraint from the in-memory schema
- call update_rdef_column which removes the size restriction from the
column's type
- add the new constraint object
- call update_rdef_column which adds the size restriction back
This breaks on SQL Server when the column is involved in an index (e.g.
as part of a multi-column unique constraint), because in the
intermediate stage the column's type is "nvarchar(max)", which is not
indexable.
Of course we must still detect the case where a size constraint is
really dropped and update the db schema accordingly.
Closes #5557633.
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#
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"""bookmark related hooks"""
__docformat__ = "restructuredtext en"
from cubicweb.server import hook
class AutoDeleteBookmarkOp(hook.Operation):
bookmark = None # make pylint happy
def precommit_event(self):
if not self.cnx.deleted_in_transaction(self.bookmark.eid):
if not self.bookmark.bookmarked_by:
self.bookmark.cw_delete()
class DelBookmarkedByHook(hook.Hook):
"""ensure user logins are stripped"""
__regid__ = 'autodelbookmark'
__select__ = hook.Hook.__select__ & hook.match_rtype('bookmarked_by',)
category = 'bookmark'
events = ('after_delete_relation',)
def __call__(self):
AutoDeleteBookmarkOp(self._cw,
bookmark=self._cw.entity_from_eid(self.eidfrom))