Displaying foreign model fields in django admin as editable

Question

I have a Django Model with a Foreign key:

class Library:
  name=models.CharField()

class Book:
  title=models.CharField()
  library=models.ForeignKey(Library)

models.py

class BookAdmin(admin.ModelAdmin):
  extra = 0
  fields = ['title', 'library__name'] # library__name not found

admin.site.register(Book, BookAdmin)

admin.py

In the admin, I want to display Book and show an editable field for Library.name in the Book view (not the other way around with inlines):

> Book
  * Title: "Foo"
  * Library Name: "Bar"

As readonly, it's easy (just creating a method in Book model returning the library name value) but I cannot make it work for editable fields, I tried using fields=('title','library.name') and fields=('title','library__name') without success

Try to do like in [this post answer](https://stackoverflow.com/questions/163823/can-list-display-in-a-django-modeladmin-display-attributes-of-foreignkey-field) — Altynbek, Dec 24 '17 at 14:29

score 0 · Answer 1 · answered Oct 14 '20 at 09:13

0

You need an inline model admin:

https://docs.djangoproject.com/en/dev/ref/contrib/admin/#inlinemodeladmin-objects

answered Oct 14 '20 at 09:13

Daniel W.

31,164
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score -2 · Answer 2 · answered Aug 03 '17 at 12:30

-2

try to use related_name in models like that

library=models.ForeignKey(Library, related_name="library")

then use fields=('title','library__name') and it should work.

answered Aug 03 '17 at 12:30

Hossam Salah

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I cannot make it work this way. changing the related_name doesn't seems to change the behavior of `fields` in the `Book` view. – angrykoala Aug 03 '17 at 12:47
what is the error u get.. give us more details if possible – Hossam Salah Aug 03 '17 at 12:48
Exception Type: FieldError Exception Value: Unknown field(s) (library__name) specified for Book. Check fields/fieldsets/exclude attributes of class BookAdmin. It's the same error I was getting before – angrykoala Aug 03 '17 at 12:50
edit ur question and show the admin class u wrote please – Hossam Salah Aug 03 '17 at 12:51
u want this field to appear when adding an object or u want it to appear in the class page for listing items? – Hossam Salah Aug 03 '17 at 12:55
When adding/editing a Book I want all the data of the book + an editable field for the Library name – angrykoala Aug 03 '17 at 13:27

Displaying foreign model fields in django admin as editable

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