What's the best way to make a new migration in a standalone Django app?
Question: I have a Django app which was spun out a while ago from the project it was
originally built for, made into a separate standalone app, and put on PyPI
(<https://pypi.python.org/pypi/mysociety-django-images>). The app is built
expecting to be run with Django 1.7+.

I'd now like to make a change to one of the models there - just changing a
`max_length` on a field. I can't see anything in the documentation about how
to make a new migration for it? Do I need to make an example project and use
that, or is there a better way?


Answer: You can do this by making a script like:

    
    
    #!/path/to/your python
    
    import sys
    import django
    
    from django.conf import settings
    from django.core.management import call_command
    
    settings.configure(
        DEBUG=True,
        INSTALLED_APPS=(
            'django.contrib.contenttypes',
            'yourAppName',
        ),
    )
    
    django.setup()
    call_command('makemigrations', 'yourAppName')
    

(this is also how we go about testing our standalone apps).

I don't know which is the better practice between this and create an example
project (this appears lighter to do).

