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Django中的一对多关系

[英]One-to-many relationships in Django

原文 2010-11-09 21:29:20 5 1 python/ django/ one-to-many

I'm trying to create a One-to-many relationship in Django. 我正在尝试在Django中创建一对多关系。 In my example, I have a news post, which may have several images associated with it. 在我的示例中，我有一个新闻帖子，其中可能有多个与之相关的图像。 However, different news posts will never share images. 但是，不同的新闻帖子将永远不会共享图像。

As far as I can see, there are two ways to do this: Through a ManyToManyField , which creates a multi-select tool in the admin panel, which shows all the images ever uploaded, or through a ForeignKeyField in the PostImage class, which results in there not being any option to add new images when creating a new news post on the admin panel. 据我所知，有两种方法可以执行此操作：通过ManyToManyField ，它在管理面板中创建一个多选工具，以显示曾经上传的所有图像，或者通过PostImage类中的ForeignKeyField来生成结果在管理面板上创建新新闻时，没有任何选项可以添加新图像。

Since the users of the admin panel will not be at all technically-inclined, I would like two things, if possible: 由于管理面板的用户根本不会在技术上有所偏向，因此，我希望有两件事，如果可能的话：

Add several images on the "Create new news post" page, without having any images from other news posts as a choice 在“创建新新闻”页面上添加几张图片，而不必选择其他新闻中的任何图片
Less importantly, replace the multi-select box with checkboxes, or anything less confusing than a multi-select box. 不太重要的是，将复选框替换为复选框，或者将其替换为比复选框更容易混淆的内容。

How can I achieve this? 我该如何实现？

1 个解决方案

The second part is the easier one: You want the horizontal javascript filter 第二部分比较简单：您需要水平javascript过滤器

If you go with a ManyToManyField, you could filter those choices by using a Custom Manager . 如果使用ManyToManyField，则可以使用Custom Manager过滤这些选择。

If you use a ForeignKey, you would want to use one of the Admin Inlines . 如果您使用ForeignKey，则需要使用Admin Inlines之一。 If you really never re-use images, use the inlines. 如果您确实从未重复使用图像，请使用内联。