django: Resolving “The model ‘MyModel’ is already registered” error
If you are migrating to django 1.0, youll have to update your models.py for django newforms-admin
Before
from django.db import models class MyModel(models.Model): """ field definitions """ class Admin pass
Now
from django.db import models from django.contrib import admin class MyModel(models.Model): """ field definitions """ class MyModelAdmin(admin.ModelAdmin): """ admin options """ admin.site.register(MyModel, MyModelAdmin)
When you run the server (manage.py runserver) you may get an error like,
ImproperlyConfigured at / Error while importing URLconf 'myproject.urls': The model MyModel is already registered
This is because the models.py is (usually) imported multiple times in your project. A model can only be associated with one AdminModel class so you get the error. To fix this, you need to place the admin.site.register line in a separate file called amdin.py. This file should exists at the same level as models.py. This will ensure that admin class for a model is registered only once.
Related posts:
Just to be clear, it’s now recommended to put both the registration as well as the ModelAdmin sub-class definitions into ‘admin.py’. (note that your original blog has what I assume is a typo: amdin.py)
William,
You are correct. Thanks for identifying the typo
[...] http://adil.2scomplement.com/2008/09/django-the-model-mymodel-is-already-registered/ [...]
thanks this was very useful and clear!