Django:通过 Django Admin 将用户添加到组

Question

如何在 Django 管理界面的“更改组”中将用户添加到组中？

我见过一些肮脏的黑客行为，让这个功能适用于旧的 django 版本。

如何使用 Django 1.10 解决这个问题？

强调:我希望它出现在“更改组”页面上，而不是“更改用户”页面上。

我想以 django-admin-style 的方式实现:无需编码，只需进行一些配置。也许是这样的:

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

Answer 1

您需要编写一些代码。请注意，Django 管理站点是普通的 Django View 和表单!

首先创建一个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

我们添加了自定义组模型表单。第二步是取消注册原始组管理员并注册一个显示我们的 ModelForm 的新组管理员:

# 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)