Django ModelChoiceField 没有加号按钮 [英] Django ModelChoiceField has no plus button

问题描述

我正在为自定义用户制作一个 Django 应用程序.我在下面概述了我的问题的关键组成部分，缺少的代码用..."表示.我的自定义用户模型具有如下外键关系:

I'm making a Django app with custom users. I've outlined the key components of my problem below, missing code is denoted by '...'. My custom user model has a foreign key relationship as follows:

class MyCustomUser(models.AbstractBaseUser, models.PermissionsMixin)
    ...
    location = models.ForeignKey(Location)

class Location(models.Model)
    name = models.CharField(max_length=50, blank=True, null=True)

我编写了一个包含此字段的自定义用户表单，如下所示:

I've written a custom user form that includes this field as follows:

class MyCustomUserCreationForm(models.ModelForm)
    ...
    location = forms.ModelChoiceField(Location.objects.all())

这一切似乎都正常工作，但是，位置选择字段的右侧没有加号按钮.我希望能够在创建用户时添加位置，就像在 Django 教程.根据这个问题，我可能不会如果我无权更改模型，请查看绿色加号，但我以具有所有权限的超级用户身份登录.知道我做错了什么吗?

This all appears to be working correctly, however, there is no plus button to the right of the select field for location. I want to be able to add a location when I create a user, in the same way that you can add polls when creating choices in the Django tutorial. According to this question, I might not see the green plus if I don't have permission to change the model, but I am logged in as a superuser with all permissions. Any idea what I'm doing wrong?

推荐答案

你需要在你的模型表单中设置一个 RelatedFieldWidgetWrapper 包装器:

You need to set a RelatedFieldWidgetWrapper wrapper in your model form:

RelatedFieldWidgetWrapper(在 django.contrib.admin.widgets 中找到)用于管理页面以包含外键的功能控件添加新的相关记录.(英文:将绿色的小加号放在控件的右侧.)

The RelatedFieldWidgetWrapper (found in django.contrib.admin.widgets) is used in the Admin pages to include the capability on a Foreign Key control to add a new related record. (In English: puts the little green plus sign to the right of the control.)

class MyCustomUserCreationForm(models.ModelForm)
    ...
    location = forms.ModelChoiceField(queryset=Location.objects.all())

    def __init__(self, *args, **kwargs):
        super(MyCustomUserCreationForm, self).__init__(*args, **kwargs)
        rel = ManyToOneRel(self.instance.location.model, 'id') 
        self.fields['location'].widget = RelatedFieldWidgetWrapper(self.fields['location'].widget, rel, self.admin_site)

我可能在示例代码中犯了一个错误，请查看这些帖子和示例:

I could make a mistake in the example code, so see these posts and examples:

• RelatedFieldWidgetWrapper
• 更多相关FieldWidgetWrapper——我自己的弹出窗口莉>
• Django admin - 如何在自定义管理表单中为多对多字段添加绿色加号
• 如何手动使用相关字段aWidget自定义小部件?
• Django:覆盖RelatedFieldWidgetWrapper

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