get_lookup(lookup_name) Returns the Lookup named lookup_name registered in the class. The default

SET_NULL [source] Set the ForeignKey null; this is only possible if null

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

delete() Performs an SQL delete query on all rows in the QuerySet and returns the number of objects deleted and

count() Returns an integer representing the number of objects in the database matching the QuerySet. The count()

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

get_transform(transform_name) Returns a Transform named transform_name. The default implementation

class ExtractDay(expression, tzinfo=None, **extra) [source] lookup_name

Field.editable If False, the field will not be displayed in the admin or any other

Field.auto_created Boolean flag that indicates if the field was automatically created, such as the OneToOneField