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@NotSqrt
Forked from nealtodd/settings_test_snippet.py
Last active May 1, 2022 01:34
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What would you like to do?
Another shot at this problem ..
class DisableMigrations(object):
def __contains__(self, item):
return True
def __getitem__(self, item):
return "notmigrations"
MIGRATION_MODULES = DisableMigrations()
@rchrd2
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rchrd2 commented Dec 11, 2014

This worked for me, and it is more simple than other solutions I came accross.

@danxshap
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Thank you for this!

@rikva
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rikva commented Dec 17, 2014

Perfect. Thanks!

@chrisbarmonde
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You are a patron saint of testing.

@runekaagaard
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One word: Ahhhhhhhhh

@jordij
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jordij commented Feb 4, 2015

boss!

@maximiliano
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Worked better for me, thanks!

@LegoStormtroopr
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+1 love it.

@LeMeteore
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Thanks a lot, +10000

@troygrosfield
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Just so everyone can support the publicly release app by @henriquebastos that includes this snippet:

Should rename the app to "headache reliever". Thanks guys! 👍

@mannysz
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mannysz commented May 7, 2015

Is there a way to use it with django-nose?

@NotSqrt
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Author

NotSqrt commented Jul 7, 2015

Glad I could help 😃

@adrienemery
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Has anyone used this with django-nose?

@flaugher
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Could someone please explain exactly how you use this snippet when running your tests? Thank you.

@chrisv2
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chrisv2 commented Jan 23, 2016

@flaugher: create a settings_test.py next to your regular settings.py:

import * from settings
# snippet content goes here

Then run your tests with settings_test instead of regular settings:

manage.py test --settings mysite.settings_test [test spec]

@nicholasserra
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Thanks!

@jamescw
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jamescw commented Feb 25, 2016

This is a great tool, but I use the hstore field on some models and the recommend way to install the hstore extension is via a migration: https://docs.djangoproject.com/es/1.9/ref/contrib/postgres/fields/#hstorefield

Any idea how I can run only one migration or run some custom SQL to install the extension?

@roblinton
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@jamescw,

Based on the same source as this app, I use something like this in my settings:

RUN_MODE = sys.argv[1] if len(sys.argv) > 1 else None

if RUN_MODE == 'test':
    class DisableMigrations(dict):
        except_apps = {'app_to_run_migrations_for'}
        def __contains__(self, item):
            return item not in self.except_apps
        def __getitem__(self, item):
            return super(DisableMigrations, self).__getitem__(item) if item in self.except_apps else None

    MIGRATION_MODULES = DisableMigrations()

@Remiz
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Remiz commented Aug 3, 2016

Not sure if someone else has the issue, but when I tried this snipped on my project that contains Cartridge, during the table creation it complains that one of the ManyToMany table already exists... Does anyone else had an issue with that?

@raprasad
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Thanks. Used this snippet with another scenario where there was need to re-create "unmanaged" database tables during tests:

https://gist.github.com/raprasad/f292f94657728de45d1614a741928308

@cjw296
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cjw296 commented Oct 7, 2016

So, how do you use this pattern when you want to test migrations as part of your test suite?

@renzon
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renzon commented Jun 7, 2017

For those who use pytest-django, it already supports commands to define db behaviour on tests:

http://pytest-django.readthedocs.io/en/latest/database.html

@cjw296

You can have a stage env with a different pytest.ini where you test migrations.

@tclancy
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tclancy commented Oct 27, 2017

Looks like you need to alter this slightly on Django 1.11:

def __getitem__(self, item):
        return None

@Jelle28
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Jelle28 commented Jul 26, 2018

Thanks, it still works 👍

@hmzeh
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hmzeh commented Jan 11, 2020

Hello,
Any help please
after running :- ./manage.py test --settings groundup.settings_test
Got this Error :- ModuleNotFoundError: No module named 'notmigrations'

Thanks

@mariuccio
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mariuccio commented Jan 30, 2020

If your Django version is >= 1.9

class DisableMigrations(object):
    def __contains__(self, item):
        return True

    def __getitem__(self, item):
        return None


MIGRATION_MODULES = DisableMigrations()

@bkane11
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bkane11 commented Feb 4, 2021

Awesome, thanks for this

@davidkell
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davidkell commented Jul 26, 2021

This is available in Django 3.1 onwards as a setting https://docs.djangoproject.com/en/3.1/ref/settings/#migrate

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