ImportError: No module named ‘django.core.urlresolvers’

Django 2.0 removes the django.core.urlresolvers module, which was moved to django.urls in version 1.10. You should change any import to use django.urls instead, like this: Note that Django 2.0 removes some features that previously were in django.core.urlresolvers, so you might have to make some more changes before your code works. See the features deprecated in 1.9 for details on those additional changes.

Getting TypeError: __init__() missing 1 required positional argument: ‘on_delete’ when trying to add parent table after child table with entries

You can change the property categorie of the class Article like this: and the error should disappear. Eventually you might need another option for on_delete, check the documentation for more details: EDIT: As you stated in your comment, that you don’t have any special requirements for on_delete, you could use the option DO_NOTHING:

Getting TypeError: __init__() missing 1 required positional argument: ‘on_delete’ when trying to add parent table after child table with entries

You can change the property categorie of the class Article like this: and the error should disappear. Eventually you might need another option for on_delete, check the documentation for more details: EDIT: As you stated in your comment, that you don’t have any special requirements for on_delete, you could use the option DO_NOTHING: