For Django 2.0+ 'on_delete' missing

[ninapavlich]

I'm using Django 2.0.2. Since Django 2.x, on_delete is a required argument: https://docs.djangoproject.com/en/2.0/ref/models/fields/#django.db.models.ForeignKey.on_delete

I'm getting the following stack trace when I attempt to instal django-security:

    Unhandled exception in thread started by <function check_errors.<locals>.wrapper at 0x10520c7b8>
Traceback (most recent call last):
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/core/management/commands/runserver.py", line 113, in inner_run
    autoreload.raise_last_exception()
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 248, in raise_last_exception
    raise _exception[1]
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/core/management/__init__.py", line 327, in execute
    autoreload.check_errors(django.setup)()
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/utils/autoreload.py", line 225, in wrapper
    fn(*args, **kwargs)
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/apps/registry.py", line 112, in populate
    app_config.import_models()
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/django/apps/config.py", line 198, in import_models
    self.models_module = import_module(models_module_name)
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
  File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/security/models.py", line 14, in <module>
    class PasswordExpiry(models.Model):
  File "/Users/nina/Documents/Sites/project-name/venv/lib/python3.6/site-packages/security/models.py", line 27, in PasswordExpiry
    user = models.ForeignKey(USER_MODEL, unique=True)
TypeError: __init__() missing 1 required positional argument: 'on_delete'

[Oxicode]

+1

[ricardofalasca]

+1

[funkaoshi]

Should cascade delete if the user is delete.