def _set_many(self,
obj,
value,
from_opposite=False,
from_load=False) -> None:
if not isinstance(value, self.type):
raise AttributeError(
f"Value should be of type {self.type.__name__}")
# Set the actual value
c: collection = self._get_many(obj)
if value in c:
if from_load:
c.items.remove(value)
c.items.append(value)
return
c.items.append(value)
try:
self._set_opposite(obj, value, from_opposite)
except Exception:
c.items.pop()
raise
self.handle(AssociationAdded(obj, self, value))
def _set_many(self, obj, value, from_opposite) -> None:
if not isinstance(value, self.type):
raise AttributeError(
f"Value should be of type {self.type.__name__}")
# Set the actual value
c: collection = self._get_many(obj)
if value in c:
return
c.items.append(value)
self._set_opposite(obj, value, from_opposite)
self.handle(AssociationAdded(obj, self, value))