如何在Django管理面板中列出所有与外键相关的对象？ [英] How can I list all foreign key related objects in Django admin panel?

问题描述

我想使用django管理面板实现一个非常简单的功能，但是到目前为止我找不到正确的方法来实现这一点：

I would like to implement a very simple feature with the django admin panel but I couldn't find the right way to achieve this so far:

model.py

class Author(models.Model):
    name = models.CharField()

class Books(models.Model):
    title = models.CharField()
    author = models.ForeignKey(Author)

admin.py

class AuthorAdmin(admin.ModelAdmin):
    pass
admin.site.register(Author, AuthorAdmin)

如何添加超链接到作者列表概述中的每个项目（作者）链接到显示特定作者的所有书籍的视图？例如：

How can I add a hyperlink to every item (Author) in the authors' list overview that links to a view showing all books of the specific author? For Example:

• J.K。罗琳（书）


• J.R.R。托尔金（书）

其中书籍是显示作者所有图书的网站的超链接。

where books is a hyperlink to a site showing all books of the author.

推荐答案

您正在寻找 ModelAdmin.list_filter 。

设置list_filter以激活更改列表右侧栏中的过滤器管理员页面。 listfilter可以是字段名称，其中指定的字段应为BooleanField，CharField，DateField，DateTimeField，IntegerField，ForeignKey或ManyToManyField，例如：

Set list_filter to activate filters in the right sidebar of the change list page of the admin. A listfilter can be a field name, where the specified field should be either a BooleanField, CharField, DateField, DateTimeField, IntegerField, ForeignKey or ManyToManyField, for example:

 # Add a list filter author to BookAdmin.
 # Now you can filter books by author.
 class BookAdmin(ModelAdmin):
    list_filter = ('author', )

现在您可以使用@Wolph建议在作者list_display中添加链接。此链接指向作者过滤的图书列表：

Now you can use @Wolph suggestion to add a link in the Author list_display. This link points to the book list filtered by author:

# Add hyperlinks to AuthorAdmin.
# Now you can jump to the book list filtered by autor. 
class AuthorAdmin(admin.ModelAdmin):
    def authors(self):
        return '<a href="/admin/appname/book/?author__id__exact=%d">%s</a>' % (self.author_id, self.author)
    authors.allow_tags = True

替换。要保存点击，您还可以直接指向一本书的更改视图：

ALTERNATIVE. To save a click you can also point to the change view of a book directly:

class Books(models.Model):
    title = models.CharField()
    author = models.ForeignKey(Author)

def get_admin_url(self):
    return "/admin/appname/books/%d/" %self.id


class BookAdmin(admin.ModelAdmin):
    def authors(self):
        html = ""
        for obj in Books.objects.filter(author__id_exact=self.id):
            html += '<p><a href="%s">%s</a></p>' %(obj.get_admin_url(), obj.title)
        return html
    authors.allow_tags = True

    list_display = ['title', authors]

免责声明：未经测试，但如果您修正打字错误，它会工作！ ：）

Disclaimer: Not tested, but if you fix the typo's it'll work! :)

请注意，这些链接也可以注入管理员的其他点。当您将其添加到窗口小部件时，您可以从更改视图切换到更改视图。

Note that these links can also be injected at other points in the admin. When you add it to a widget, you can go from change view to change view.

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