Django Formset丢失管理表单数据

我正在尝试为formset编写单元测试，但在尝试实例化它时出现以下错误。Django Formset丢失管理表单数据

错误：

Traceback (most recent call last): 
    File "/home/jwelborn/Documents/projects/Bingo/bingo/cards/tests/test_forms.py", line 218, in test_formset_accepts_valid_data 
     self.assertTrue(formset.is_valid()) 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/forms/formsets.py", line 321, in is_valid 
     self.errors 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/forms/formsets.py", line 295, in errors 
     self.full_clean() 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/forms/formsets.py", line 343, in full_clean 
     for i in range(0, self.total_form_count()): 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/forms/formsets.py", line 116, in total_form_count 
     return min(self.management_form.cleaned_data[TOTAL_FORM_COUNT], self.absolute_max) 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/utils/functional.py", line 35, in __get__ 
     res = instance.__dict__[self.name] = self.func(instance) 
    File "/home/jwelborn/Documents/projects/Bingo/bingoenv/lib/python3.6/site-packages/django/forms/formsets.py", line 98, in management_form 
     code='missing_management_form', 
    django.core.exceptions.ValidationError: ['ManagementForm data is missing or has been tampered with']

此错误说我失踪ManagmentForm数据，但我包括它在字典中，我传递给我的形式。我检查了不同的拼写，并改变了最小和最大数字，但无济于事。

forms.py：

class BingoSquareForm(ModelForm): 

    class Meta: 
     model = BingoCardSquare 
     exclude = ('created_date',) 


BingoSquareFormset = inlineformset_factory(
    BingoCard, 
    BingoCardSquare, 
    form=BingoSquareForm, 
    min_num=24, 
    validate_min=True, 
    max_num=24, 
    validate_max=True 
)

tests.py

class BingoSquareFormsetTests(TestCase): 

    def setUp(self): 

     self.user = User.objects.get_or_create(
      username='FormsetTestUser', 
      email='[email protected]' 
     )[0] 
     self.user.set_password('bingo') 
     self.user.save() 

     self.card = BingoCard.objects.get_or_create(
      title='FormsetTest', 
      free_space='free_space', 
      creator=self.user, 
     )[0] 

     self.data = { 
      'form-TOTAL_FORMS': '24', 
      'form-INITIAL_FORMS': '0', 
      'form-MAX_NUM_FORMS': '24', 
      'form-MIN_NUM_FORMS': '24' 
     } 

     for i in range(24): 
      text_key = 'form-{}-text'.format(i) 
      text_value = 'square {}'.format(i) 
      self.data[text_key] = text_value 

    def test_formset_accepts_valid_data(self): 

     formset = BingoSquareFormset(self.data) 
     self.assertTrue(formset.is_valid())

有人能看到我在做什么错？

来源

2017-10-18 Jay

此错误是由于未对表单集的表单数据使用正确的前缀而导致的。 Django的inlineformset_factory自动将formset前缀设置为子模型的ForeignKeyField中定义的related_name。

models.py：

class BingoCardSquare(models.Model): 

    ... 

    card = models.ForeignKey(
     BingoCard, 
     related_name='squares', 
     on_delete=models.CASCADE, 
    ) 
    ...

在这种情况下，self.data属性应该被设置为以下：

self.data = { 
    'squares-TOTAL_FORMS': '24', 
    'squares-INITIAL_FORMS': '0', 
    'squares-MAX_NUM_FORMS': '24', 
    'squares-MIN_NUM_FORMS': '24' 
    }

每个额外的形式将需要前缀相同的方式。希望这个答案能够帮助未来的遇难者。

来源

2017-10-23 19:09:27 Jay

Django Formset丢失管理表单数据

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