在Django查询过滤中如何做不平等? [英] How do I do a not equal in Django queryset filtering?

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问题描述

在Django模型QuerySets中,我看到有比较价值的 __ gt __ lt ,但是在那里一个 __ ne / != / <> 不等于?)

In Django model QuerySets, I see that there is a __gt and __lt for comparitive values, but is there a __ne/!=/<> (not equals?)

我想使用不等于过滤:

示例:

Model:
    bool a;
    int x;

我想要

results = Model.objects.exclude(a=true, x!=5)

!= 语法不正确。我试过 __ ne <>

The != is not correct syntax. I tried __ne, <>.

我最终使用:

results = Model.objects.exclude(a=true, x__lt=5).exclude(a=true, x__gt=5)


推荐答案

也许 Q对象可能对此有帮助问题。我从来没有使用过它们,但是似乎它们可以被否定,并且与普通的python表达式很相似。

Maybe Q objects could be of help for this problem. I've never used them but it seems they can be negated and combined much like normal python expressions.

更新:我刚刚尝试过,似乎工作得很好:

Update: I Just tried it out, it seems to work pretty well:

>>> from myapp.models import Entry
>>> from django.db.models import Q

>>> Entry.objects.filter(~Q(id = 3))

[<Entry: Entry object>, <Entry: Entry object>, <Entry: Entry object>, ...]

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