python - Django 工厂男孩 : fill modelfield with choices throws error

Question

我正在一家模型工厂工作，我正在尝试填写一个有选择列表的字段。当我尝试使用工厂创建一个对象并尝试从选择列表中填充随机选择时，会引发异常:

TypeError: 'choice' is an invalid keyword argument for this function

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python2.7/dist-packages/factory/base.py", line 551, in build
    return cls._generate(enums.BUILD_STRATEGY, kwargs)
  File "/usr/local/lib/python2.7/dist-packages/factory/base.py", line 505, in _generate
    return step.build()
  File "/usr/local/lib/python2.7/dist-packages/factory/builder.py", line 279, in build
    kwargs=kwargs,
  File "/usr/local/lib/python2.7/dist-packages/factory/base.py", line 312, in instantiate
    return self.factory._build(model, *args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/factory/base.py", line 531, in _build
    return model_class(*args, **kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/base.py", line 571, in __init__
    raise TypeError("'%s' is an invalid keyword argument for this function" % list(kwargs)[0])
TypeError: 'choice' is an invalid keyword argument for this function

使用的版本:

django==1.11
factory-boy==2.9.2
python==2.7.12

(裁剪后的)模型:

class Server(models.Model):

    TEST = 'test'
    ACCEPT = 'accept'

    SERVER_TYPES = (
        (TEST, _("Testing Server")),
        (ACCEPT, _("Acceptation Server"))
    )

    type = models.CharField(_("Server type"), max_length=50, choices=SERVER_TYPES)

(裁剪后的)工厂:

class ServerFactory(factory.DjangoModelFactory):

    type = factory.Faker('random_element', elements=[choice[0] for choice in Server.SERVER_TYPES)

    class Meta:
        model = Server

我没有使用 Faker('random_element, elements=[..])，而是尝试使用 LazyFunction:

def get_server_type():
    choices = [choice[0] for choice in Server.SERVER_TYPES]
    return random.choice(choices)

class ServerFactory(factory.DjangoModelFactory):

    organization = factory.SubFactory(OrganizationFactory)
    type = factory.LazyFunction(get_server_type)

    .. Meta ..

这也会引发相同的错误。我也找不到任何真正的其他替代方案来解决这个问题。对于如何在使用 factory 包时使用 SERVER_TYPES 选项之一填充 type 字段，有什么建议吗？

Answer 1

你能试试这个吗？

from random import choice
type = factory.LazyAttribute(lambda x: choice(Server.SERVER_TYPES)[0])

基于问题最初描述的旧评论:

应该是type =factory.Faker('random_element', elements=[choice[0] for choice in Server.SERVER_TYPES])