Django book chapter 6: unable to import Book model

Question

I am learning Django going through the online book, and am presently stuck at Chapter 6. In the Adding Your Models to the Admin Site section the reader is required to create a file named admin.py, within the books app, with this content:

from django.contrib import admin
from mysite.books.models import Publisher, Author, Book

admin.site.register(Publisher)
admin.site.register(Author)
admin.site.register(Book)

This is supposed to make these models available for editing at the admin site, but what I get is the following:

ImportError at /admin/
No module named books.models

In the Python command line I get a similar error:

>>> from mysite.books.models import Book
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: No module named mysite.books.models

These are the contents of the models.py file:

from django.db import models

class Publisher(models.Model):
    name = models.CharField(max_length=30)
    address = models.CharField(max_length=50)
    city = models.CharField(max_length=60)
    state_province = models.CharField(max_length=30)
    country = models.CharField(max_length=50)
    website = models.URLField()

    def __unicode__(self):
        return self.name

    class Meta:
        ordering = ['name']


class Author(models.Model):
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40)
    email = models.EmailField()

    def __unicode__(self):
        return u'%s %s' % (self.first_name, self.last_name)


class Book(models.Model):
    title = models.CharField(max_length=100)
    authors = models.ManyToManyField(Author)
    publisher = models.ForeignKey(Publisher)
    publication_date = models.DateField()

    def __unicode__(self):
        return self.title

I have strictly followed the instructions in the book to this point, thus I should have an exact copy of the code used. The file structure was created automatically by Django:

books
  __init__.py
  admin.py
  models.py
  tests.py
  views.py
mysite
  templates
  __init__.py
  settings.py
  urls.py
  views.py
  wsgi.py
manage.py

What would be the correct way of importing the models file in the admin module?

Answer 1

This is pretty old book and some things are deprecated in current version of Django.

Try this import:

from books.models import Publisher, Author, Book

instead of:

from mysite.books.models import Publisher, Author, Book