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:
name = models.CharField()
title = models.CharField()
author = models.ForeignKey(Author)
You are looking for a ModelAdmin.list_filter.
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', )
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
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]
Disclaimer: Not tested, but if you fix the typo's it'll work! :)
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.