Django get_queryset返回自定义变量 [英] Django get_queryset return custom variables

问题描述

以用户为例，我试图显示有多少用户。 get_context_data 可以很好地工作，但 get_queryset 不能。我知道它的设置不正确，但是我已经玩了很多天了，而且有些东西没有点击。.

Using users as an example I am trying to show how many users there are. get_context_data works totally fine but get_queryset does not. I know that it's not set up properly but I've been playing around with it for quite some days and something is just not clicking..

主要目标是使用 Dajngo-Filter 表单，然后能够获取更新的用户数。我只找到了无数有关如何显示用户列表的文档。我已完成但没有有关如何显示自定义变量的文档。我有很多统计数据我想根据所应用的过滤器来计算图表。

The main goal is to use the Dajngo-Filter form and then be able to get the updated number of user count. I've only found endless documentation on how to show the "list" of users. Which I have done but no documentation on how to show custom variables. I have many statistics & charts I'd like to calculate based on the filters applied.

class UserFilterView(LoginRequiredMixin, FilterView):
    template_name = 'community/user_list.html'
    model =  User
    filterset_class = UserFilter

    def get_queryset(self):
        user_count = User.objects.all().count()

    def get_context_data(self, *args, **kwargs):
        context = super(UserFilterView, self).get_context_data(*args, **kwargs)
        context['user_count'] = User.objects.all().count()
        return context

推荐答案

context['user_count'] = User.objects.all().count()

设置为始终计算所有用户。因此，当然，它总是会按照编程的方式进行操作。

is set to always count all users. So, of course, it's going to always do what it's programmed it to do.

相反，我应该从过滤后的查询集中使用.count。

Instead, I should use .count from the filtered queryset.

view.py

class UserFilterView(LoginRequiredMixin, FilterView):
    template_name = 'community/user_list.html'
    model =  User
    filterset_class = UserFilter

    def get_context_data(self, *args, **kwargs):
        context = super(UserFilterView, self).get_context_data(*args, **kwargs)
        context['qs'] = User.objects.all()
        return context

模板：

User Count: {{ filter.qs.count }}

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