def on_merge(sender=None, request=None, **kw):
"""
"""
if request is None:
return
master = get_master(sender.obj)
if master is None:
return
log_change(ChangeTypes.merge, request, master, sender.obj, sender.logmsg())
def on_create(sender=None, request=None, **kw):
"""To be called when a new instance has actually been created and
saved.
"""
master = get_master(sender)
if master is None:
return
log_change(ChangeTypes.create, request, master, sender,
dd.obj2str(sender, True))
def on_delete(sender=None, request=None, **kw):
"""Calls :func:`log_change` with `ChangeTypes.delete`.
Note that you must call this before actually deleting the object,
otherwise mysql (not sqlite) says ERROR: (1048, "Column
'object_id' cannot be null")
"""
master = get_master(sender)
if master is None:
return
log_change(ChangeTypes.delete, request, master, sender,
dd.obj2str(sender, True))
def on_update(sender=None, watcher=None, request=None, **kw):
"""
Log a Change if there is a `change_watcher_spec`.
`watcher` is a :class:`lino.core.diff.ChangeWatcher` instance.
"""
master = get_master(watcher.watched)
if master is None:
# No master, nothing to log
return
cs = watcher.watched.change_watcher_spec
changed_fields = ''
if False: # I tried a html version, but it doesn't help to make
# things more end-user friendly. And it caused
# problems when being rendered in a grid.
changes = list(watcher.get_updates_html(cs.ignored_fields))
if len(changes) == 0:
msg = '(no changes)'
elif len(changes) == 1:
msg = tostring(changes[0])
else:
msg = tostring(E.ul(*changes))
else:
changes = []
for k, old, new in watcher.get_updates(cs.ignored_fields):
changed_fields += k + " "
changes.append("%s : %s --> %s" %
(k, dd.obj2str(old), dd.obj2str(new)))
if len(changes) == 0:
msg = '(no changes)'
elif len(changes) == 1:
msg = changes[0]
else:
msg = '- ' + ('\n- '.join(changes))
log_change(
ChangeTypes.update, request, master, watcher.watched,
msg, changed_fields)
def on_remove_child(sender=None, request=None, child=None, **kw):
master = get_master(sender)
if master is None:
return
log_change(ChangeTypes.remove_child, request, master, sender,
dd.full_model_name(child))