django admin如何在使用自定义操作按钮时添加上下文？

Question

我的管理面板中的每条记录都有一个自定义操作按钮“添加帖子”。我想在上下文中保存obj.id 以将其用作admin:channels_post_add 表单中的默认值

class ChannelAdmin(admin.ModelAdmin):
    list_display = ['title','username', 'invite_link', 'account_actions']

    def account_actions(self, obj):

        !!!! I WANT TO ADD CONTEXT HERE!!!!

        return format_html('<a class="button" href="{}">Add post</a>', reverse('admin:channels_post_add'))

    account_actions.short_description = 'Actions'
    account_actions.allow_tags = True

    class Meta:
        model = Channel

admin.site.register(Channel, ChannelAdmin)





class PostAdmin(admin.ModelAdmin):
    list_display = ['text', 'media', 'send_type', 'created']

    class Meta:
        model = Post


    def get_form(self, request, obj=None, **kwargs):
        form = super(PostAdmin, self).get_form(request, obj, **kwargs)
        try:

            post_id = !!! AND USE IT HERE!!!!

            form.base_fields['channels'].initial = post_id
        except Exception as e:
            print(e)
        return form

Answer 1

您可以在 url 中添加 GET 参数。

url = "%s?pid=%s" % (reverse(admin:channels_post_add), obj.id)

然后request.GET.get("pid") 进入get_form()：

class ChannelAdmin(admin.ModelAdmin):

    ...

    def account_actions(self, obj):
        url = "%s?pid=%s" % (reverse(admin:channels_post_add), obj.id)
        return format_html('<a class="button" href="{}">Add post</a>', url)



class PostAdmin(admin.ModelAdmin):

    ...

    def get_form(self, request, obj=None, **kwargs):
        form = super(PostAdmin, self).get_form(request, obj, **kwargs)
        try:
            form.base_fields['channels'].initial = request.GET.get("pid")
        except Exception as e:
            print(e)
        return form

我认为你必须使用ModelAdmin.get_changeform_initial_data(request)(Django Docs) 来设置初始值。

用于管理更改表单的初始数据的挂钩。默认情况下，字段 从 GET 参数中获得初始值。例如， ?name=initial_value 会将 name 字段的初始值设置为 initial_value。

此方法应返回 {'fieldname' 形式的字典： '字段值'}：

url = "%s?channels=%s" % (reverse(admin:channels_post_add), obj.id)

或

def get_changeform_initial_data(self, request):
    return {'channels': request.GET.get("pid")}