Django形式：我如何填写一个字段但不可能填写两个字段？

Question

我希望有一个选项可以链接到文件或上传文件。显然你不能做到这两点。我该如何实现呢？

Answer 1

Take a look at the Django docs about the clean function for cleaning and validating fields that depend on each other.

然后，您可以在clean内检查两个字段的值。

这些方面的东西：

from django import forms
from django.core.exceptions import ValidationError


class MyForm(forms.Form):

    field_1 = forms.CharField(required=False)

    field_2 = forms.CharField(required=False)

    def clean(self):

        # Get the field values submitted
        cleaned_data = super(MyForm, self).clean()
        field_1_data = cleaned_data.get('field_1')
        field_2_data = cleaned_data.get('field_2')

        # Check that only one field is filled out.
        if field_1_data and field_2_data:
            raise ValidationError('Only fill out one field please.', code='invalid')