Change default faker locale in factory_boy

How can I set the default locale in Python’s factory_boy for all of my Factories?

In docs says that one should set it with factory.Faker.override_default_locale but that does nothing to my fakers…

import factory
from app.models import Example
from custom_fakers import CustomFakers

# I use custom fakers, this indeed are added
factory.Faker.add_provider(CustomFakers)
# But not default locales
factory.Faker.override_default_locale('es_ES')

class ExampleFactory(factory.django.DjangoModelFactory):
    class Meta:
        model = Example

    name = factory.Faker('first_name')


>>> from example import ExampleFactory
>>> e1 = ExampleFactory()
>>> e1.name
>>> u'Chad'

[x-yuri]

See workaround here.

[rbarrois]

So, let’s look at the different situations where one might want to change the default locale:

• For part of a specific test: this is covered by with override_default_locale():
• For a specific test function: this is covered by @override_default_locale()
• For a collection of tests grouped in a TestCase subclass: @override_default_locale() might not be enough here
• For a whole run of the program / test suite, with a fixed value from run to run
• For a whole run of the program / test suite, with different values between runs

For the last two cases, we’ll have to look into the program setup:

• For a program (say, generating a realistic dataset), it is usually easy to add a with override_default_locale() within the program’s main() function
• For a test run, this has to happen within the test runner setup

For Django, I believe that the recommended mode is to:

1. Subclass Django’s DiscoverRunner
2. Overload its run_tests function, to wrap the initial method inside a with override_default_locale()
3. Point your settings’ TEST_RUNNER to your class:

# settings.py
TEST_RUNNER = 'myproject.testing.MyTestRunner'

# myproject/testing.py
import factory
from django.conf import settings
from django.util import translation
import django.test.runner

class MyTestRunner(django.test.runner.DiscoverRunner):
    def run_tests(self, test_labels, extra_tests=None, **kwargs):
        with factory.Faker.override_default_locale(translation.to_locale(settings.LANGUAGE_CODE)):
            return super().run_tests(test_labels, extra_tests=extra_tests, **kwargs)