列的总和按日期分组

Question

Django ORM查询在白天汇总每个属性和组的总数是什么

表：订单 属性

• order_date
• wants_fries
• wants_onions
• wants_pickles

日期| want_fries | wants_onions | wants_pickles ================================================== ===============

2015, 9, 12  |      15        |     21        |      32
2015, 9, 13  |      49        |     9         |      22
2015, 9, 14  |      23        |     7         |      29
2015, 9, 15  |      7         |     20        |      35