diff options
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/ref/models/expressions.txt | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/docs/ref/models/expressions.txt b/docs/ref/models/expressions.txt index 460a7f70d4..a26e918e70 100644 --- a/docs/ref/models/expressions.txt +++ b/docs/ref/models/expressions.txt @@ -381,7 +381,7 @@ The ``Aggregate`` API is as follows: A class attribute, as a format string, that describes the SQL that is generated for this aggregate. Defaults to - ``'%(function)s( %(expressions)s )'``. + ``'%(function)s(%(distinct)s%(expressions)s)'``. .. attribute:: function @@ -444,20 +444,19 @@ SQL that is generated. Here's a brief example:: from django.db.models import Aggregate - class Count(Aggregate): - # supports COUNT(distinct field) - function = 'COUNT' - template = '%(function)s(%(distinct)s%(expressions)s)' + class Sum(Aggregate): + # Supports SUM(ALL field). + function = 'SUM' + template = '%(function)s(%(all_values)s%(expressions)s)' + allow_distinct = False - def __init__(self, expression, distinct=False, **extra): + def __init__(self, expression, all_values=False, **extra): super().__init__( expression, - distinct='DISTINCT ' if distinct else '', - output_field=IntegerField(), + all_values='ALL ' if all_values else '', **extra ) - ``Value()`` expressions ----------------------- |