“管理”面板中的“多对多”字段的List_display

本文介绍了“管理”面板中的“多对多”字段的List_display的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我有2个应用程序： Visitors 和 Meetings ，并通过 ManytoMany 字段：

I have 2 apps: Visitors and Meetings, linked via a ManytoMany field:

visitors / models.py：

visitors/models.py:

from django.db import models
from meetings.models import Meeting

class Visitor(models.Model):

    visitor_name = models.CharField(default='name', max_length=128, blank=False, null=False)
    visitor_meetings = models.ManyToManyField(Meeting)

    def __str__(self):
        return self.visitor_name

会议/models.py：

meetings/models.py:

from django.db import models
from team.models import Team

class Meeting(models.Model):
    team_member = models.ForeignKey(Team)
    meeting_name = models.CharField(default='name', max_length=128, blank=True, null=True)

    def __str__(self):
        return self.meeting_name

我知道获取 list_di的正确方法在访客管理面板中进行会议的splay 在这里：。

I know the correct way to get a list_display for meetings in the Visitors admin panel is here: https://stackoverflow.com/a/18108586/2429989.

但是，如何显示 list_display 会议管理面板中为每次会议的访客提供code>？我尝试过：

However, how can I show a list_display for visitors at each meeting in the Meetings admin panel? I have tried:

会议/admin.py：

meetings/admin.py:

from django.contrib import admin
from .models import Meeting
from visitors.models import Visitor

class MeetingAdmin(admin.ModelAdmin):
    list_display = ['id', 'team_member', 'show_visitors' ]

    def show_visitors(self, obj):
        return "\n".join([a.visitor_name for a in obj.visitor.all()])

admin.site.register(Meeting, MeetingAdmin)

这导致'Meeting'对象没有属性'visitor'，我在哪里出错？

This results in 'Meeting' object has no attribute 'visitor', where am I going wrong?

`推荐答案`

默认反向查找关系始终为。您需要使用 obj.visitor_set.all（）

The default reverse lookup relation it's always obj.tablename_set. In your case you need to use obj.visitor_set.all()

class MeetingAdmin(admin.ModelAdmin):
    list_display = ['id', 'team_member', 'show_visitors' ]

    def show_visitors(self, obj):
        return "\n".join([a.visitor_name for a in obj.visitor_set.all()])

但是，您可以通过定义：

However, you can customize the name of the reverse lookup by defining the related_name:

class Visitor(models.Model):
    visitor_name = models.CharField(default='name', max_length=128, blank=False, null=False)
    visitor_meetings = models.ManyToManyField(Meeting, related_name='visitors')

    def __str__(self):
        return self.visitor_name

所有会议对象现在都可以访问个访问者。像这样使用它：

All Meeting objects will now have access to visitors. Use it like:

class MeetingAdmin(admin.ModelAdmin):
    list_display = ['id', 'team_member', 'show_visitors' ]

    def show_visitors(self, obj):
        return "\n".join([a.visitor_name for a in obj.visitors.all()])

                        这篇关于“管理”面板中的“多对多”字段的List_display的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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