def nestedmodelformset_factory(model=None, from_dbfield=None, parent_model=None,
base_form=NestedModelFormset, fields=None, exclude=None, readonly=None):
model = model if model else get_related_class(from_dbfield, parent_model)
field_names = fields or model._meta.fields.keys()
meta_attrs = {'model':model, 'fields':field_names, 'exclude':exclude, 'readonly':readonly}
meta = type('Meta', (object,), meta_attrs)
return type('%sFormset'%model.__name__, (base_form,), {'Meta':meta})
def __init__(self, items, parent, field):
self.parent = parent
self.field = field
self.related_class = get_related_class(field, parent) if field.related else None
self._items = []
for item in (items or []):
self.append(item, new=False)
self._old_hash = self.make_hash()
def clean_value(self, inst, value):
# TODO: supporting multiple database routing by the method "allow_relation"
if isinstance(value, dict):
if self.related:
cls = get_related_class(self, inst)
elif not value.get('class', None):
raise InvalidRelationValue('The relation "%s" has not a class.'%value)
else:
if isinstance(value['class'], basestring):
try:
cls = import_anything(value['class'])
except ImportError:
raise InvalidRelationValue('The class for relation "%s" was not found.'%value)
else:
cls = value['class']
# Loads the related object
try:
value = cls.query().get(pk=value['pk'])
except cls.DoesNotExist: # FIXME we have to find another way to treat this
value['error'] = 'Object not found'
return value
def get_related_queryset(self, obj):
if not self.related:
return []
return get_related_class(self, obj).query()
