class Question(models.Model):
question_text = models.CharField(max_length=450)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
posted_by = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
class Answer(models.Model):
question = models.ForeignKey(Question, related_name='answers', on_delete=models.CASCADE)
answer_text = models.CharField(max_length=5000)
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
posted_by = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
class VoteAnswer(models.Model):
answer = models.ForeignKey(Answer, related_name='votes', on_delete=models.CASCADE)
voted_by = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
class QuestionSeriaizer(serializers.HyperlinkedModelSerializer):
answer_count = serializers.SerializerMethodField()
posted_by = UserDetailSerializer(read_only=True)
class Meta:
model = Question
fields = ('url', 'id', 'question_text', 'created_at', 'updated_at', 'posted_by', 'answer_count', 'page',
'who_can_answer')
depth = 1
@staticmethod
def get_answer_count(obj):
return obj.answers.all().count()
问题序列化程序中应该有一个“top\u answer”字段,该字段的答案得票最多。
我尝试了以下方法,但没有成功:
class QuestionSeriaizer(serializers.HyperlinkedModelSerializer):
answer_count = serializers.SerializerMethodField()
top_answer = serializers.SerializerMethodField()
posted_by = UserDetailSerializer(read_only=True)
class Meta:
model = Question
fields = ('url', 'id', 'question_text', 'created_at', 'updated_at', 'posted_by', 'answer_count', 'page',
'who_can_answer', 'top_answer')
depth = 1
@staticmethod
def get_answer_count(obj):
return obj.answers.all().count()
@staticmethod
def get_top_answer(obj):
return obj.answers.annotate(total_votes=obj.answers.votes.all().count()).order_by('total_votes').first()
您可以使用^{} 这样尝试:
如果您有AnswerSerializer,则可以尝试:
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