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

FieldFile.save(name, content, save=True) [source] This method takes a filename and file contents

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

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

Field.help_text Extra “help” text to be displayed with the form widget. It’s useful for documentation even if your field isn’t

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

SET() [source] Set the ForeignKey to the value passed to SET()

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

CASCADE [source] Cascade deletes. Django emulates the behavior of the SQL constraint ON DELETE

ImageField.width_field Name of a model field which will be auto-populated with the width of the image each time the model instance