ModelForm 和单元测试的奇怪问题：TypeError: getattr(): 属性名称必须是字符串

Question

我不知道这里会发生什么：

模型.py

class Sound(models.Model):
    SEX_CHOICES = (
            ('M', 'Male'),
            ('F', 'Female')
    )
    phrase1 = models.CharField(max_length=300)
    phrase2 = models.CharField(max_length=300)
    language = models.CharField(max_length=50)
    num_words = models.PositiveSmallIntegerField(verbose_name="number of words")
    num_syllables = models.PositiveSmallIntegerField(verbose_name="number of syllables")
    sex = models.CharField(max_length=1, choices=SEX_CHOICES)
    voice = models.BooleanField(verbose_name="synthetic voice")
    speaker_name = models.CharField(max_length=50)
    sound_hash = models.CharField(max_length=40, primary_key=True, editable=False)
    key = models.CharField(max_length=200, editable=False, default="", null=True, help_text="Amazon S3 key")

表格.py

from django import forms
class LessonSoundForm(forms.ModelForm):
    class Meta:
        model = Sound
        fields = ["phrase1", "phrase2", "num_words", "num_syllables"]

测试.py

from django.test import TestCase
from forms import LessonSoundForm
class LessonSoundForm(TestCase):
    def setUp(self):
        self.sound_data = {
                "phrase1": "Poop",
                "phrase2": "Knuckle",
                "num_words": 1,
                "num_syllables": 1
        }

    def test_lesson_sound_form_validates_with_good_data(self):
        form = LessonSoundForm(data=self.sound_data)
        self.assertTrue(form.is_valid())

这看起来非常简单，所有其他测试都使用ModelForm. 但是，我收到此错误：

line 20, in test_lesson_sound_form_validates_with_good_data
        form = LessonSoundForm(data=self.sound_data)
    TypeError: __init__() got an unexpected keyword argument 'data'

如果我在没有data参数的情况下运行它，我会得到：

    form = LessonSoundForm(self.sound_data)
  File "/usr/lib/python3.6/unittest/case.py", line 397, in __init__
    testMethod = getattr(self, methodName)
TypeError: getattr(): attribute name must be string

这似乎是一个非常基本的案例，我不知道会出现什么问题。我认为这只是一天的结束，我错过了一些愚蠢的事情。

Answer 1

from forms import LessonSoundForm
                  ^^^^^^^^^^^^^^^
class LessonSoundForm(TestCase):
      ^^^^^^^^^^^^^^^

LessonSoundForm由于相同的 name ，当您为测试用例定义新类时，您正在覆盖。