class Prefetch(lookup, queryset=None, to_attr=None) [source] The Prefetch()

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

distinct If distinct=True, the count will only include unique instances. This is the SQL equivalent of COUNT(DISTINCT

all() Returns a copy of the current QuerySet (or QuerySet subclass). This can be useful in

none() Calling none() will create a queryset that never returns any objects and no query will be executed when accessing the

get(**kwargs) Returns the object matching the given lookup parameters, which should be in the format described in Field lookups

only(*fields) The only() method is more or less the opposite of defer(). You call it with the fields

exists() Returns True if the QuerySet contains any results, and False if not. This tries

sample By default, StdDev returns the population standard deviation. However, if sample=True, the

update(**kwargs) Performs an SQL update query for the specified fields, and returns the number of rows matched (which may not