查询集在子键内返回

Question

我想列出所有评论以及对特定餐厅特定评论的回复，但我只能列出评论。在尝试获取对其特定评论的所有回复时，我调用了评论模型中定义的 children()。它返回查询集。另一方面，我想要所有带有回复者名称的特定回复。

serializers.py

class ReviewSeraializer(ModelSerializer):
    reply_count = SerializerMethodField()
    children = SerializerMethodField()
    class Meta:
        model = Review
        read_only = ('id',) 
        fields = ('id','content_type','object_id','parent','review','children','reply_count','created') 

    def get_reply_count(self, obj):
        if obj.is_parent:
            return obj.children().count()
        return 0

    def get_children(self, obj):
        obj_children = []
        if obj.is_parent:
            return str(obj.children())
            # for obj in obj.children():
            #   print(obj.review)
            #   obj_children.append(obj.review)
            # return str(obj_children)
        return None

review/models.py

class Review(models.Model):
    reviewer = models.ForeignKey(User, null=True)
    content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE)
    object_id = models.PositiveIntegerField()
    content_object = GenericForeignKey('content_type', 'object_id')
    parent = models.ForeignKey("self", null=True, blank=True, related_name="parent_review")
    review = models.TextField()
    created = models.DateTimeField(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)

    objects = ReviewManager()


    def children(self): # replies
        return Review.objects.filter(parent=self)

    @property   
    def is_parent(self):
        if self.parent is not None:
            return False 
        return True 

如何列出特定评论的子键中的所有回复和回复者名称？

Answer 1

添加另一个可以序列化您的孩子的序列化程序。

class ReviewSeraializerChild(serializers.ModelSerializer):
    class Meta:
        model = Review


class ReviewSeraializer(serializers.ModelSerializer):
    reply_count = serializers.SerializerMethodField()
    children = ReviewSeraializerChild(many=True)

    class Meta:
        model = Review
        read_only = ('id',)
        fields = ('id', 'content_type', 'object_id', 'parent', 'review', 'children', 'reply_count', 'created')

    def get_reply_count(self, obj):
        if obj.is_parent:
            return obj.children().count()
        return 0

但是您必须为嵌套字段 编写自定义的 create() 和 update() 函数。