本文整理汇总了Python中django.db.models.aggregates.Aggregate方法的典型用法代码示例。如果您正苦于以下问题：Python aggregates.Aggregate方法的具体用法？Python aggregates.Aggregate怎么用？Python aggregates.Aggregate使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类django.db.models.aggregates的用法示例。
在下文中一共展示了aggregates.Aggregate方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: resolve_expression
# 需要导入模块: from django.db.models import aggregates [as 别名]
# 或者: from django.db.models.aggregates import Aggregate [as 别名]
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
# 需要导入模块: from django.db.models import aggregates [as 别名]
# 或者: from django.db.models.aggregates import Aggregate [as 别名]
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)