def references_model(self, name, app_label):
name_lower = name.lower()
if name_lower == self.model_name_lower:
return True
if self.field:
return bool(
field_references((app_label, self.model_name_lower),
self.field, (app_label, name_lower)))
return False
def references_model(self, name, app_label):
name_lower = name.lower()
if name_lower == self.name_lower:
return True
# Check we didn't inherit from the model
reference_model_tuple = (app_label, name_lower)
for base in self.bases:
if (base is not models.Model and isinstance(base, (models.base.ModelBase, str)) and
resolve_relation(base, app_label) == reference_model_tuple):
return True
# Check we have no FKs/M2Ms with it
for _name, field in self.fields:
if field_references((app_label, self.name_lower), field, reference_model_tuple):
return True
return False
def references_field(self, model_name, name, app_label):
model_name_lower = model_name.lower()
# Check if this operation locally references the field.
if model_name_lower == self.model_name_lower:
if name == self.name:
return True
elif self.field and hasattr(
self.field,
'from_fields') and name in self.field.from_fields:
return True
# Check if this operation remotely references the field.
if self.field is None:
return False
return bool(
field_references(
(app_label, self.model_name_lower),
self.field,
(app_label, model_name_lower),
name,
))