arg_joiner A class attribute that denotes the character used to join the list of expressions together. Defaults

Options.base_manager_name New in Django 1.10. The

extra(select=None, where=None, params=None, tables=None, order_by=None, select_params=None) Sometimes, the Django query syntax

Field.model Returns the model on which the field is defined. If a field is defined on a superclass of a model, model

lhs The left-hand side - what is being looked up. The object must follow the Query Expression API

class TruncDay(expression, output_field=None, tzinfo=None, **extra) [source]

deconstruct() [source] Returns a 4-tuple with enough information to recreate the field:

DO_NOTHING [source] Take no action. If your database backend enforces referential integrity

class Transform [source] A Transform is a generic class to implement field transformations

class Substr(expression, pos, length=None, **extra) [source] Returns a substring of length