Django - Accessing _set from Admin change page

问题

Lets take the standard example

class Author(models.Model):
  name = models.CharField(max_length=100)

class Book(models.Model):
  title = models.CharField(max_length=100)
  author = models.ForeignKey(Author)
  #... Many other fields ...

From the admin change template of Author trying to access to the related books

<ul>
  {% for book in original.book_set.all %}
    <li>
      <a href="{% url admin:myapp_manager_change book.id %}">Edit {{ book }}</a>
    </li>
  {% endfor %}
</ul>

I get

Caught NoReverseMatch while rendering: Reverse for 'myapp_manager_change' with arguments '(1L,)' and keyword arguments '{}' not found.

Why ?
And how can I access this book_set ?

回答1:

Check the docs on reversing admin urls.

You have to replace "myapp" with your actual app:

admin:{{ app_label }}_{{ model_name }}_change object_id

So if your app is named library and your model's name is book the link would be:

<a href="{% url admin:library_book_change book.id %}">Edit {{ book }}</a>

回答2:

book_set actually works well in your example because the exception is raised from inside the for loop. It seems the problem is with the view name.

Try this:

{% url admin:myapp_book_change book.id %}

来源：https://stackoverflow.com/questions/8051535/django-accessing-set-from-admin-change-page