python - Django + Factory Boy : How to use a named parameter to control behavior of factory. 也许+ factory.RelatedFactory

Question

有没有办法定义命名参数(不是模型属性)来控制 factory.Maybe 的行为？

例如:我想创建一个命名参数，通过可能条件控制RelatedFactory的创建，我尝试这样做:

# factories.py
class Purchase(factory.DjangoModelFactory):
    user = factory.SubFactory('project.factories.UserFactory')
    total = uniform(10, 100)

    class Meta:
        model = Purchase

class UserFactory(factory.DjangoModelFactory):
    first_name = factory.Faker('first_name')
    last_name = factory.Faker('last_name')

    has_purchase = False
    purchases = factory.Maybe(
        'has_purchase',
        yes_declaration=factory.RelatedFactory(Purchase, 'purchase'),
        no_declaration=None
    )

    class Meta:
        exclude = ['has_purchase', 'purchases']
        model = User

# tests.py
user_without_purchase = UserFactory.create()
user_with_purchase = UserFactory.create(has_purchase=True)

我似乎无法通过命名参数更改has_purchase 的值，它始终设置为False。不知道是不是因为这两个字段都声明在exclude Meta属性中。我必须将它们放在 exclude 中，否则 DjangoModelFactory 在将其保存到数据库时会尝试使用这些字段，这会导致完整性错误。

有办法吗？

Answer 1

工厂男孩似乎有一个功能可以提供额外的参数，而不必将这些字段添加到 exclude 属性:http://factoryboy.readthedocs.io/en/latest/reference.html#simple-parameters :

class UserFactory(factory.DjangoModelFactory):
    class Params:
        has_purchase = False

与 http://factoryboy.readthedocs.io/en/latest/reference.html#lazyattribute 结合使用也许？