Question

我需要验证内联formset是否具有唯一值。这个想法是能够添加一个问题和多个答案的竞争。我们可以使用复选框标记正确的答案，但是我需要确保选择或保存的复选框不超过一个。我已经尝试在模型端使用clean（）进行验证，并且还通过扩展BaseInlineFormSet，但是我似乎很难迭代formset并获得任何值。

class Competition(models.Model):

    title = models.CharField(max_length=255)
    slug = models.SlugField(unique=True, blank=False)
    content = models.TextField()
    terms = models.TextField()


class Question(models.Model):
    competition = models.OneToOneField(
        Competition,
        on_delete=models.CASCADE,
        primary_key=True,
    )
    question = models.CharField(max_length=255)


class Answer(models.Model):

    question = models.ForeignKey(Question)
    answer = models.CharField(max_length=255)
    is_correct = models.BooleanField(default=False)

Answer 1

所以经过一夜的睡眠后，我似乎已经设法解决了这个问题

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

class AnswerInlineFormSet(BaseInlineFormSet):

    def clean(self):

        super(AnswerInlineFormSet, self).clean()
        total_checked = 0

        for form in self.forms:
            if not form.is_valid():
                return
            if form.cleaned_data and not form.cleaned_data.get('DELETE'):
                if form.cleaned_data['is_correct']:
                    total_checked += 1

        if total_checked > 1:
            raise ValidationError("You cannot have more than one correct answer")

        if total_checked < 1:
            raise ValidationError("You must have at least one correct answer")

验证Django Admin内联表单集

1 个答案: