def moving_node(sender, to_save):
with lock_tables(sender._meta.db_table):
current = sender.objects.get(id=to_save.id)
size = current.highestchildnodenumber - current.nodenumber + 1
new_parent = sender.objects.get(id=to_save.parent.id)
insertion_point = open_interval(sender, new_parent.nodenumber, size)
# node interval will have moved if it is to the right of the insertion point
# so fetch again
current = sender.objects.get(id=current.id)
move_interval(sender, current.nodenumber, current.highestchildnodenumber, insertion_point)
close_interval(sender, current.nodenumber, size)
# update the nodenumbers in to_save so the new values are not overwritten.
current = sender.objects.get(id=current.id)
to_save.nodenumber = current.nodenumber
to_save.highestchildnodenumber = current.highestchildnodenumber
def moving_node(sender, to_save):
with lock_tables(sender._meta.db_table):
current = sender.objects.get(id=to_save.id)
size = current.highestchildnodenumber - current.nodenumber + 1
new_parent = sender.objects.get(id=to_save.parent.id)
insertion_point = open_interval(sender, new_parent.nodenumber, size)
# node interval will have moved if it is to the right of the insertion point
# so fetch again
current = sender.objects.get(id=current.id)
move_interval(sender, current.nodenumber,
current.highestchildnodenumber, insertion_point)
close_interval(sender, current.nodenumber, size)
# update the nodenumbers in to_save so the new values are not overwritten.
current = sender.objects.get(id=current.id)
to_save.nodenumber = current.nodenumber
to_save.highestchildnodenumber = current.highestchildnodenumber
def adding_node(sender, obj):
with lock_tables(obj._meta.db_table):
parent = sender.objects.get(id=obj.parent.id)
insertion_point = open_interval(sender, parent.nodenumber, 1)
obj.highestchildnodenumber = obj.nodenumber = insertion_point
def adding_node(sender, obj):
with lock_tables(obj._meta.db_table):
parent = sender.objects.get(id=obj.parent.id)
insertion_point = open_interval(sender, parent.nodenumber, 1)
obj.highestchildnodenumber = obj.nodenumber = insertion_point