def _raise_if_not_fetched(self) -> None:
if not self._fetched:
raise NoValuesFetched(
"No values were fetched for this relation, first use .fetch_related()"
)
def __getitem__(self, item):
if not self._fetched:
raise NoValuesFetched(
'No values were fetched for this relation, first use .fetch_related()'
)
return self.related_objects[item]
def __bool__(self):
if not self._fetched:
raise NoValuesFetched(
'No values were fetched for this relation, first use .fetch_related()'
)
return bool(self.related_objects)
def __len__(self) -> int:
if not self._fetched:
raise NoValuesFetched(
"No values were fetched for this relation, first use .fetch_related()"
)
return len(self.related_objects)
def __iter__(self):
if not self._fetched:
raise NoValuesFetched(
"No values were fetched for this relation, first use .fetch_related()"
)
return self.related_objects.__iter__()
def __contains__(self, item) -> bool:
if not self._fetched:
raise NoValuesFetched(
"No values were fetched for this relation, first use .fetch_related()"
)
return item in self.related_objects