在 Django admin 中编辑组对象时将用户对象分配给组 [英] Assign User-objects to a Group while editing Group-object in Django admin

问题描述

在用户对象(编辑用户)的默认 Django 管理视图中，可以编辑用户的组成员身份.如果我也想反过来呢?IE.在群组编辑页面中，可以选择属于正在编辑的群组的用户.

正如我所看到的，Django 没有从 Group 到 User 对象的 ManyToMany 映射，这使得(?)无法为这种特殊情况实现 ModelAdmin 类.如果我可以创建一个额外的 UsersOfGroup 模型类并在 Django 的 Group 模型的 ManyToMany 字段中使用它作为直通属性，那么可能会有一种方法.

任何想法，这是否可以使用 ModelAdmin 技巧来实现，还是我只需要为编辑组制作自定义视图?

我已经检查了另外两个问题，但它们的作用并不完全相同:

在管理员中添加用户时分配组

和

在管理员中显示组成员身份p>

更新:克里斯的答案几乎就在那里.:) 该组引用了用户集，但它被称为 user_set，而不是 users.以下是我所做的更改:

如果 self.instance 和 self.instance.pk:self.fields['users'].initial = self.instance.user_set.all()

和

如果 group.pk:group.user_set = self.cleaned_data['users']

解决方案

yourapp/admin.py

从 django 导入表单从 django.contrib 导入管理员从 django.utils.translation 导入 ugettext_lazy 作为 _从 django.contrib.admin.widgets 导入 FilteredSelectMultiple从 django.contrib.auth.models 导入用户、组类 GroupAdminForm(forms.ModelForm):用户 = forms.ModelMultipleChoiceField(queryset=User.objects.all(),必需=假，小部件=FilteredSelectMultiple(verbose_name=_('用户'),is_stacked=假))元类:模型 = 组def __init__(self, *args, **kwargs):super(GroupAdminForm, self).__init__(*args, **kwargs)如果 self.instance 和 self.instance.pk:self.fields['users'].initial = self.instance.users.all()def保存(自我，提交=真):group = super(GroupAdminForm, self).save(commit=False)如果提交:group.save()如果组.pk:group.users = self.cleaned_data['users']self.save_m2m()返回组类 GroupAdmin(admin.ModelAdmin):表格 = GroupAdminFormadmin.site.unregister(组)admin.site.register(组，GroupAdmin)

In the default Django admin view for user-object (edit user) one can edit the user's group memberships. What if I wanted this the other way around also? I.e. in the group editing page one could select the users that belong to the group being edited.

As I see this, Django doesn't have a ManyToMany mapping from Group to User object which makes it impossible(?) to implement a ModelAdmin class for this particular case. If I could make an additional UsersOfGroup model class and use it in the Django's Group model's ManyToMany field as a through-attribute, there could be a way.

Any ideas, is this possible to implement using ModelAdmin tricks or do I just have to make a custom view for editing groups?

I have checked these two other questions, but they don't quite do the same thing:

Assigning a group while adding user in admin

and

Show group membership in admin

Updated: The answer from Chris was almost there. :) The group has a reference to the users set, but it's called user_set, not users. So these are the changes I made:

if self.instance and self.instance.pk:
    self.fields['users'].initial = self.instance.user_set.all()

and

if group.pk:
    group.user_set = self.cleaned_data['users']

解决方案

yourapp/admin.py

from django import forms
from django.contrib import admin
from django.utils.translation import ugettext_lazy as _
from django.contrib.admin.widgets import FilteredSelectMultiple

from django.contrib.auth.models import User, Group

class GroupAdminForm(forms.ModelForm):
    users = forms.ModelMultipleChoiceField(
        queryset=User.objects.all(), 
        required=False,
        widget=FilteredSelectMultiple(
            verbose_name=_('Users'),
            is_stacked=False
        )
    )

    class Meta:
        model = Group

    def __init__(self, *args, **kwargs):
        super(GroupAdminForm, self).__init__(*args, **kwargs)

        if self.instance and self.instance.pk:
            self.fields['users'].initial = self.instance.users.all()

    def save(self, commit=True):
        group = super(GroupAdminForm, self).save(commit=False)

        if commit:
            group.save()

        if group.pk:
            group.users = self.cleaned_data['users']
            self.save_m2m()

        return group

class GroupAdmin(admin.ModelAdmin):
    form = GroupAdminForm

admin.site.unregister(Group)
admin.site.register(Group, GroupAdmin)

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