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