Django Formset丟失管理表單數據

我正在嘗試爲formset編寫單元測試，但在嘗試實例化它時出現以下錯誤。Django Formset丟失管理表單數據

錯誤：

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']

此錯誤說我失蹤ManagmentForm數據，但我包括它在字典中，我傳遞給我的形式。我檢查了不同的拼寫，並改變了最小和最大數字，但無濟於事。

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麼錯？

來源

2017-10-18 Jay

此錯誤是由於未對錶單集的表單數據使用正確的前綴而導致的。 Django的inlineformset_factory自動將formset前綴設置爲子模型的ForeignKeyField中定義的related_name。

models.py：

class BingoCardSquare(models.Model): 

    ... 

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

在這種情況下，self.data屬性應該被設置爲以下：

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

每個額外的形式將需要前綴相同的方式。希望這個答案能夠幫助未來的遇難者。

來源

2017-10-23 19:09:27 Jay

Django Formset丟失管理表單數據

回答

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