28 lines
700 B
Python
28 lines
700 B
Python
from django.db import models
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from django.db.models import Q
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from django.db.models import UniqueConstraint
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class Answer(models.Model):
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question = models.ForeignKey(
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"questions.Question",
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on_delete=models.CASCADE,
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null=False,
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related_name="answers"
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)
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description = models.TextField()
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is_correct = models.BooleanField(default=False)
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def get_secret_answer(self):
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return {
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"id": self.id,
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"description": self.description,
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}
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class Meta:
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constraints = [UniqueConstraint(
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fields=["question"],
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condition=Q(is_correct=True),
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name="only_one_correct_answer"
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)]
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