Django：通过Django Admin将用户添加到群组

问题描述

如何在更改组的Django管理界面中将用户添加到组中？

How can I add users to a group in Django admin interface of "Change Group"?

我已经看到肮脏的骇客，使其可以在较早的django版本上使用。

I have seen dirty hacks to get this working for older django version.

如何使用Django 1.10解决此问题？

How to solve this with Django 1.10?

强调：我想要在更改组页面上，而不是更改用户。

Emphasize: I want this on the page "Change Group", not on "Change User".

我想使用django-admin风格的代码：无需编码，只需进行一些配置即可。也许是这样的：

I would like to have this in django-admin-style: No coding, just doing some configuration. Maybe like this:

class GroupAdmin(admin.ModelAdmin):
    show_reverse_many_to_many = ('user',)

推荐答案

您需要编写 some 代码。请注意，Django管理站点是正常的Django视图和表单！

You need to write some code. Note that the Django admin site is normal Django views and forms!

首先创建一个ModelForm：

First create a ModelForm:

from django import forms
from django.contrib import admin
from django.contrib.auth import get_user_model
from django.contrib.admin.widgets import FilteredSelectMultiple
from django.contrib.auth.models import Group


User = get_user_model()


# Create ModelForm based on the Group model.
class GroupAdminForm(forms.ModelForm):
    class Meta:
        model = Group
        exclude = []

    # Add the users field.
    users = forms.ModelMultipleChoiceField(
         queryset=User.objects.all(),
         required=False,
         # Use the pretty 'filter_horizontal widget'.
         widget=FilteredSelectMultiple('users', False)
    )

    def __init__(self, *args, **kwargs):
        # Do the normal form initialisation.
        super(GroupAdminForm, self).__init__(*args, **kwargs)
        # If it is an existing group (saved objects have a pk).
        if self.instance.pk:
            # Populate the users field with the current Group users.
            self.fields['users'].initial = self.instance.user_set.all()

    def save_m2m(self):
        # Add the users to the Group.
        self.instance.user_set.set(self.cleaned_data['users'])

    def save(self, *args, **kwargs):
        # Default save
        instance = super(GroupAdminForm, self).save()
        # Save many-to-many data
        self.save_m2m()
        return instance

我们添加了一个自定义的Group ModelForm。第二步是注销原始组管理员并注册一个显示我们的ModelForm的新组管理员：

We added a custom Group ModelForm. The second step is to unregister the original Group admin and register a new Group admin that displays our ModelForm:

# Unregister the original Group admin.
admin.site.unregister(Group)

# Create a new Group admin.
class GroupAdmin(admin.ModelAdmin):
    # Use our custom form.
    form = GroupAdminForm
    # Filter permissions horizontal as well.
    filter_horizontal = ['permissions']

# Register the new Group ModelAdmin.
admin.site.register(Group, GroupAdmin)

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