Django:使ModelForm中的某些字段成为必需= False

Question

如何在ModelForm中创建某些字段= False？

如果我有:

class ThatForm(ModelForm):
  class Meta:
    widgets = {"text": Textarea(required=False)}

或者,如果我有:

class ThatForm(ModelForm):
  text = Textarea(required=False)

Django回归:

__init__() got an unexpected keyword argument 'required'

Answer 1

以下是评论.可能是:

class ThatForm(ModelForm):
    def __init__(self, *args, **kwargs):
        # first call parent's constructor
        super(ThatForm, self).__init__(*args, **kwargs)
        # there's a `fields` property now
        self.fields['desired_field_name'].required = False

Answer 2

你应该将blank = True添加到相应的模型中

文件说

如果模型字段为空= True,则表单字段上的required设置为False.否则,required = True.

另请参阅文档以了解空白.

Answer 3

当我们需要在一堆字段上设置所需选项时,我们可以:

class ThatForm(forms.ModelForm):

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        for field in self.Meta.required:
            self.fields[field].required = True

    class Meta:
        model = User
        fields = (
            'email',
            'first_name',
            'last_name',
            'address',
            'postcode',
            'city',
            'state',
            'country',
            'company',
            'tax_id',
            'website',
            'service_notifications',
        )
        required = (
            'email',
            'first_name',
            'last_name',
            'address',
            'postcode',
            'city',
            'country',
        )

Answer 4

以下可能是合适的

class ThatForm(ModelForm):
    text = forms.CharField(required=False, widget=forms.Textarea)