更改目录结构后，Django迁移未检测到更改

Question

I have created a Django project using this directory structure :

bi3online
    __init__.py
    migrations
        __init__.py
    static
    templates
    media
    manage.py
    models.py
    urls.py
    views.py
    wsgi.py
    ...

When I run python manage.py makemigrations and python manage.py migrate it only creates migrations for auth app and then when I try again it says no changes detected. It seems that migrations work only with apps but I'm not sure.

models.py

from django.db import models


class Book(models.Model):
    id = models.AutoField(primary_key=True)
    title = models.CharField(null=False, blank=False, max_length=64)

Answer 1

Just to sum up the comments and lead you to the solution:

Django works with apps. The app is a folder with models.py , apps.py and views.py modules (optionally other).

Say your app is called books . For Django to recognize the folder as an app you need to add your app to settings.py :

INSTALLED_APPS = [
    ... ,
    'books'
]

And you need your apps.py module in books folder to have this:

from django.apps import AppConfig


class BooksConfig(AppConfig):
     name = 'books'

And you should have the following project structure:

bi3online
    books
        migrations
            __init__.py
        __init__.py
        models.py
        views.py
    bi3online
        __init__.py
        manage.py
        urls.py
        wsgi.py
    static
    templates
    media