Share faker generator with Factory Boy's faker registry

The problem

No documented way to share an existing faker generator with Factory Boy. Sometimes you might not always want to use the faker library from Factory Boy’s Faker class, so it would be nice if Factory Boy could share a common faker generator.

Proposed solution

Allow an easy way to attach an existing faker generator to Factory Boy. Perhaps something like factory.Faker.attach_fake(faker_generator), assuming that’s possible?

Workaround

import factory
from faker import Factory as FakerFactory

LOCALE = 'en-US'
fake = FakerFactory.create(locale=LOCALE)
factory.Faker._DEFAULT_LOCALE = LOCALE
factory.Faker._FAKER_REGISTRY[LOCALE] = fake

Extra notes

• Relates to #407

[x-yuri]

I believe resolving #407 resolves this issue as well. Since this one was created in hope to work around the former. As it is you can add custom providers:

import factory, faker

class MyProvider(faker.providers.BaseProvider):
    def smth(self):
        return self.random_element([1, 2, 3])

factory.Faker.add_provider(MyProvider)

And set the seed. Although I believe it’s poorly documented. And I’m going to file a corresponding issue. I can mention there anybody interested.

[x-yuri]

The only thing special about the faker in my projects, is setting the locale, adding custom providers, and also setting the faker seed.

Setting the locale: https://github.com/FactoryBoy/factory_boy/issues/407#issuecomment-754281399 https://github.com/FactoryBoy/factory_boy/pull/832

Adding providers: see the previous post.

Setting the seed: https://github.com/FactoryBoy/factory_boy/issues/833