def alter_field(self, app_label, model_name, name, field,
preserve_default):
if not preserve_default:
field = field.clone()
field.default = NOT_PROVIDED
else:
field = field
model_key = app_label, model_name
fields = self.models[model_key].fields
if self._relations is not None:
old_field = fields.pop(name)
if old_field.is_relation:
self.resolve_model_field_relations(model_key, name, old_field)
fields[name] = field
if field.is_relation:
self.resolve_model_field_relations(model_key, name, field)
else:
fields[name] = field
# TODO: investigate if old relational fields must be reloaded or if
# it's sufficient if the new field is (#27737).
# Delay rendering of relationships if it's not a relational field and
# not referenced by a foreign key.
delay = (not field.is_relation
and not field_is_referenced(self, model_key, (name, field)))
self.reload_model(*model_key, delay=delay)
def alter_field(self, app_label, model_name, name, field,
preserve_default):
if not preserve_default:
field = field.clone()
field.default = NOT_PROVIDED
else:
field = field
model_state = self.models[app_label, model_name]
model_state.fields[name] = field
# TODO: investigate if old relational fields must be reloaded or if
# it's sufficient if the new field is (#27737).
# Delay rendering of relationships if it's not a relational field and
# not referenced by a foreign key.
delay = (not field.is_relation
and not field_is_referenced(self, (app_label, model_name),
(name, field)))
self.reload_model(app_label, model_name, delay=delay)
def state_forwards(self, app_label, state):
if not self.preserve_default:
field = self.field.clone()
field.default = NOT_PROVIDED
else:
field = self.field
model_state = state.models[app_label, self.model_name_lower]
model_state.fields[self.name] = field
# TODO: investigate if old relational fields must be reloaded or if it's
# sufficient if the new field is (#27737).
# Delay rendering of relationships if it's not a relational field and
# not referenced by a foreign key.
delay = (not field.is_relation and not field_is_referenced(
state,
(app_label, self.model_name_lower),
(self.name, field),
))
state.reload_model(app_label, self.model_name_lower, delay=delay)