Complete django DB reset

This Snippet gives you the code for a manage.py reset_db command you can install, it's the minimum change that solves your problem

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That said, from comments below:

You might as well just install Django command extensions to get reset_db and other goodies: https://github.com/django-extensions/django-extensions

You want sqlreset:

% python manage.py help sqlreset
Usage: manage.py sqlreset [options] <appname appname ...>

Prints the DROP TABLE SQL, then the CREATE TABLE SQL, for the given app name(s).

Options:
  -v VERBOSITY, --verbosity=VERBOSITY
                        Verbosity level; 0=minimal output, 1=normal output,
                        2=all output
  --settings=SETTINGS   The Python path to a settings module, e.g.
                        "myproject.settings.main". If this isn't provided, the
                        DJANGO_SETTINGS_MODULE environment variable will be
                        used.
  --pythonpath=PYTHONPATH
                        A directory to add to the Python path, e.g.
                        "/home/djangoprojects/myproject".
  --traceback           Print traceback on exception
  --version             show program's version number and exit
  -h, --help            show this help message and exit

Just like when you modify a model, Django will not automatically do this for you. It will only output the commands for you to copy and paste.