限制与选择中所选对象相关的对象的选择 [英] limit the choices for objects related to the chosen in the select

问题描述

我想知道是否有人会返回与选择选项中选择的会话相关的类别。

示例：

  class Session（models.Model）：
名称= models.CharField（Sessão，max_length = 100）
 slug =模型。 SlugField（ Slug，max_length = 100）
 
类Category（models.Model）：
 session = models.ForeignKey（Session，verbose_name ='Sessão'，on_delete = models.CASCADE， max_length = 100，默认值= 1，空白= True，null = True）
 category = models.CharField（ Categoria，max_length = 100）
 slug = models.SlugField（ Slug，max_length = 100）
 
 class Article（models.Model）：
 category = models.ForeignKey（Category，verbose_name ='Categoria'，on_delete = models.CASCADE，max_length = 100，default = 1， blank = True，null = True）
 session = models.ForeignKey（Session，verbose_name ='Sessão'，on_delete = models.CASCADE，max_length = 100，default = 1，blank = True，null = True）
  

当r例如，撰写一篇文章，我将为该文章定义一个会话，然后我想返回类别，仅返回与该会话相关的类别。

有人可以帮助我吗？
我相信这必须是动态的...

强烈的拥抱！

解决方案

第一个解决方案：

覆盖模板（ Django文档可以帮助您）

字段更改时，您需要对API进行ajax调用，该API带有session_id并返回所有类别。通过JS将返回的结果填充到类别中。

此外，您可以尝试 django-ajax-selects

第二个解决方案：（不使用JS / AJAX）

要注册文章，您可以先进入会话管理员，然后在其中添加文章的链接。

a。
如果要执行changeform_view操作，则
您可以使用内联管理并覆盖其形式init（）来预填充类别。

b 。
如果要在changelist_view中链接，

  http：// localhost：8000 / admin /< app> / article / add /？session_id =<> 
  

您可以覆盖Article Admin表单init（）并读取传递的session_id并相应地使用它。 / p>

I wonder if anyone would know a way to return the categories related to the session chosen in the select options.

Example:

class Session(models.Model):
    name = models.CharField("Sessão", max_length=100)
    slug = models.SlugField("Slug", max_length=100)

class Category(models.Model):
    session = models.ForeignKey(Session, verbose_name='Sessão', on_delete=models.CASCADE, max_length=100, default=1, blank=True, null=True)
    category = models.CharField("Categoria", max_length=100)
    slug = models.SlugField("Slug", max_length=100)

class Article(models.Model):
    category = models.ForeignKey(Category, verbose_name='Categoria', on_delete=models.CASCADE, max_length=100, default=1, blank=True, null=True)
    session = models.ForeignKey(Session, verbose_name='Sessão', on_delete=models.CASCADE, max_length=100, default=1, blank=True, null=True)

When registering an Article, I would define a session for the article, and then I would like to return categories, only the categories related to that session.

Can anybody help me ? I believe this would have to be dynamically ...

Strong hug!

解决方案

1st solution:

Override the template (Django Documentation can help you with that)

Onchange of the field, you need to make an ajax call to an API which takes in session_id and returns you all the categories. Fill the returned result into categories through JS.

Also, you can give a try to django-ajax-selects

2nd solution: (without JS/AJAX)

To register an article, You can first go to session admin and then have a link there to add an article.

a. If you want to do it changeform_view then, You can use inline admin and override its form init() to prepopulate the categories.

b. If you want the link in changelist_view,

http://localhost:8000/admin/<app>/article/add/?session_id=<>

You can override the Article Admin form init() and read the session_id passed and use it accordingly.

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