ForeignKey.swappable Controls the migration framework’s reaction if this ForeignKey is pointing at a swappable

values(*fields) Returns a QuerySet that returns dictionaries, rather than model instances, when used as an iterable

prefetch_related_objects(model_instances, *related_lookups) [source]

DateField.auto_now_add Automatically set the field to now when the object is first created. Useful for creation of timestamps

Field.null If True, Django will store empty values as NULL in the database. Default is False

ForeignKey.related_name The name to use for the relation from the related object back to this one. It’s also the default value

class Avg(expression, output_field=FloatField(), **extra) [source] Returns the mean value

ForeignKey.on_delete When an object referenced by a ForeignKey is deleted, Django will emulate the behavior of

exclude(**kwargs) Returns a new QuerySet containing objects that do not match the given lookup parameters

class BigIntegerField(**options) [source] A 64-bit integer, much like an IntegerField