python - How To Edit ManyToManyField In Django Admin list Display Page?

Question

I want to add Many2Many fields editable in Django admin list_display page. The model structure as below,

class Genre(models.Model):
    name = models.CharField(max_length=250, unique=True)


class Movie(models.Model):
    name = models.CharField(max_length=250)
    genre = models.ManyToManyField(Genre)

And I tried as,

class MovieAdmin(admin.ModelAdmin):
    list_display = ['name', 'genre']
    list_editable = ['genre']

Above throws an error.

标签： pythondjangodjango-formsdjango-admindjango-modeladmin

Answer 1

默认情况下，Django 不允许在 ModelAdmin 的 list_editable 中添加 ManyToManyField。所以我们需要重写模型管理方法。

在查看您的模型时，您需要按照以下步骤在列表显示页面中获取可编辑的 ManyToManyField。

在apps/forms.py 中 ，您需要定义哪些 ManyToMany 字段需要在列表显示页面中进行编辑。如下，

from django import forms
from app.models import Genre


class MovieChangeListForm(forms.ModelForm):

    # here we only need to define the field we want to be editable
    genre = forms.ModelMultipleChoiceField(queryset=Genre.objects.all(), 
        required=False)

在app/admin.py 中 ，您需要覆盖模型管理员的方法。如下，

from django.contrib import admin
from django.contrib.admin.views.main import ChangeList
from app.models import Movie
from app.forms import MovieChangeListForm

class MovieChangeList(ChangeList):

    def __init__(self, request, model, list_display,
        list_display_links, list_filter, date_hierarchy,
        search_fields, list_select_related, list_per_page,
        list_max_show_all, list_editable, model_admin):

        super(MovieChangeList, self).__init__(request, model,
            list_display, list_display_links, list_filter,
            date_hierarchy, search_fields, list_select_related,
            list_per_page, list_max_show_all, list_editable, 
            model_admin)

        # these need to be defined here, and not in MovieAdmin
        self.list_display = ['action_checkbox', 'name', 'genre']
        self.list_display_links = ['name']
        self.list_editable = ['genre']


class MovieAdmin(admin.ModelAdmin):

    def get_changelist(self, request, **kwargs):
        return MovieChangeList

    def get_changelist_form(self, request, **kwargs):
        return MovieChangeListForm


admin.site.register(Movie, MovieAdmin)

现在你们都准备好检查更改，运行服务器并检查电影模型的 django admin。您可以直接从列表显示页面编辑 ManyToMany 字段。

注意：如果您要在列表中使用多个可编辑的 ManyToManyFields，则需要在settings.py中设置 DATA_UPLOAD_MAX_NUMBER_FIELDS 。