def __setitem__(self, new_key, value, _sa_initiator=None):
# TODO We could check if the object's type is correct.
assert self._linked
if value in self.itervalues():
# Just some consistency checks, for extra safety!
assert getattr(value, self._child_rel) is self._parent_obj
old_key = list(k for k, v in self.iteritems() if v is value)
assert len(old_key) == 1
old_key = old_key[0]
assert old_key == getattr(value, self._column)
# If needed, we make SQLAlchemy call _on_column_changed to
# do the rest of the job (and repeat the above checks).
if new_key != getattr(value, self._column):
setattr(value, self._column, new_key)
else:
# We change the attribute before adding it to the collection
# to prevent the (unavoidable) call to _on_column_change
# from doing any damage.
if new_key != getattr(value, self._column):
setattr(value, self._column, new_key)
# Remove any old object with this key and add this instead.
if new_key in self:
sa_del(self, dict.__getitem__(self, new_key), _sa_initiator)
dict.__delitem__(self, new_key)
value = sa_set(self, value, _sa_initiator)
dict.__setitem__(self, new_key, value)
def __setitem__(self, new_key, value, _sa_initiator=None):
# TODO We could check if the object's type is correct.
assert self._linked
if value in self.itervalues():
# Just some consistency checks, for extra safety!
assert getattr(value, self._child_rel) is self._parent_obj
old_key = list(k for k, v in self.iteritems() if v is value)
assert len(old_key) == 1
old_key = old_key[0]
assert old_key == getattr(value, self._column)
# If needed, we make SQLAlchemy call _on_column_changed to
# do the rest of the job (and repeat the above checks).
if new_key != getattr(value, self._column):
setattr(value, self._column, new_key)
else:
# We change the attribute before adding it to the collection
# to prevent the (unavoidable) call to _on_column_change
# from doing any damage.
if new_key != getattr(value, self._column):
setattr(value, self._column, new_key)
# Remove any old object with this key and add this instead.
if new_key in self:
sa_del(self, dict.__getitem__(self, new_key), _sa_initiator)
dict.__delitem__(self, new_key)
value = sa_set(self, value, _sa_initiator)
dict.__setitem__(self, new_key, value)
def _on_column_change(self, value, new_key, old_key, _sa_initiator):
assert self._linked
if getattr(value, self._child_rel) is self._parent_obj:
# Get the old_key (the parameter may not be reliable) and
# do some consistency checks.
assert value in self.itervalues()
old_key = list(k for k, v in self.iteritems() if v is value)
assert len(old_key) == 1
old_key = old_key[0]
assert old_key == getattr(value, self._column)
# If necessary, move this object (and remove any old object
# with this key).
if new_key != old_key:
dict.__delitem__(self, old_key)
if new_key in self:
sa_del(self, dict.__getitem__(self, new_key), _sa_initiator)
dict.__delitem__(self, new_key)
dict.__setitem__(self, new_key, value)
def _on_column_change(self, value, new_key, old_key, _sa_initiator):
assert self._linked
if getattr(value, self._child_rel) is self._parent_obj:
# Get the old_key (the parameter may not be reliable) and
# do some consistency checks.
assert value in self.itervalues()
old_key = list(k for k, v in self.iteritems() if v is value)
assert len(old_key) == 1
old_key = old_key[0]
assert old_key == getattr(value, self._column)
# If necessary, move this object (and remove any old object
# with this key).
if new_key != old_key:
dict.__delitem__(self, old_key)
if new_key in self:
sa_del(self, dict.__getitem__(self, new_key),
_sa_initiator)
dict.__delitem__(self, new_key)
dict.__setitem__(self, new_key, value)
