Question

这是原始查询集Django ORM：

ob = Shop.objects.raw('SELECT * from shops GROUP BY
 (duplicate_field_name) having COUNT(*) = 1 ORDER BY some_field')

listorder = ["check_in","check_out","location"]

此listorder部分是动态的。我不知道它会怎样。它会不时地改变排序＆amp;还有一件事不能对原始查询集进行排序，因为我希望将整个数据用于其他目的。之后只有我才能应用排序。这里要按列表“listorder”排序。

mObj = ob.order_by[*listorder]。

在上面面临的错误就像无法对原始查询集进行排序。有什么想法吗？

Answer 1

如果希望按不同字段对原始查询集进行排序，可以将它们添加到ORDER BY子句中。

ob = Shop.objects.raw('SELECT * from shops GROUP BY
 (duplicate_field_name) having COUNT(*) = 1 ORDER BY check_in, check_out, location')

如果您希望特定字段的订单被撤消，您可以将其更改为

ob = Shop.objects.raw('SELECT * from shops GROUP BY
 (duplicate_field_name) having COUNT(*) = 1 ORDER BY check_in, check_out DESC, location')

如果排序是动态的，您可以动态创建查询字符串。

qs = ''SELECT * from shops GROUP BY
 (duplicate_field_name) having COUNT(*) = 1'

# some other code here to decide what your ordering is example
order_fields = ['id','location','check_in','check_out']

qs = qs + "ORDER BY " + ",".join(order_fields)

然后你可以像以前一样查询

Shop.objects.raw(qs)

Django ORM：对原始查询集应用排序

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