[Django]-How to create a Factory-Boy factory for a model with TaggableManager field

For anyone else coming here who wants a more generalised example of using Factory Boy and django-taggit, the Factory Boy docs include a Many-to-Many example which is useful. So:

import factory

from myapp.models import Experiment


class ExperimentFactory(factory.DjangoModelFactory):
    class Meta:
        model = Experiment

    # other fields here

    @factory.post_generation
    def tags(self, create, extracted, **kwargs):
        if not create:
            # Simple build, do nothing.
            return

        if extracted:
            # A list of tags were passed in, use them.
            for tag in extracted:
                self.tags.add(tag)

Then you can do:

from myapp.factories import ExperimentFactory

ExperimentFactory(name='A Name', tags=['Tag 1', 'Tag 2', 'Another tag',])

Note, this won’t create tags if you do ExperimentFactory.build(), only if you do ExperimentFactory.create() or its synonym ExperimentFactory().

finally found the solution:

@factory.post_generation
def post_tags(self, create, extracted, **kwargs):
    self.tags.add(u'abc, cde', u'xzy')