本文整理匯總了Python中django.db.models.aggregates.Aggregate方法的典型用法代碼示例。如果您正苦於以下問題：Python aggregates.Aggregate方法的具體用法？Python aggregates.Aggregate怎麽用？Python aggregates.Aggregate使用的例子？那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在類django.db.models.aggregates的用法示例。
在下文中一共展示了aggregates.Aggregate方法的2個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的Python代碼示例。
示例1: resolve_expression
# 需要導入模塊: from django.db.models import aggregates [as 別名]
# 或者: from django.db.models.aggregates import Aggregate [as 別名]
def resolve_expression(self, query=None, allow_joins=True, reuse=None, summarize=False, for_save=False):
return super(Aggregate, self).resolve_expression(query, allow_joins, reuse, summarize) 示例2: test_distinct_aggregation
# 需要導入模塊: from django.db.models import aggregates [as 別名]
# 或者: from django.db.models.aggregates import Aggregate [as 別名]
def test_distinct_aggregation(self):
class DistinctAggregate(Aggregate):
allow_distinct = True
aggregate = DistinctAggregate('first', 'second', distinct=True)
msg = (
"SQLite doesn't support DISTINCT on aggregate functions accepting "
"multiple arguments."
)
with self.assertRaisesMessage(NotSupportedError, msg):
connection.ops.check_expression_support(aggregate)