小编Vic*_*tor的帖子

我正在为一个网站创建一个API，该网站我有一个带有Books的表，另一个带有Hashtags的表（基本上是hashtags的目录，例如“ #traveling”）和一个中间表，用于在Books之间建立多对多关系和标签。我的模型是：

# models.py
class Books(models.Model):
    id_books = models.AutoField(primary_key=True)
    title = models.CharField(max_length=150)

class Hashtags(models.Model):
    id_hashtags = models.AutoField(primary_key=True)
    hashtag = models.CharField(max_length=150)

class Books_Hashtags(models.Model):
    id_books_hashtags = models.AutoField(primary_key=True)
    id_books = models.ForeignKey(Books, on_delete=models.CASCADE)
    id_hashtags = models.ForeignKey(Hashtags, on_delete=models.CASCADE)
    class Meta:
        unique_together = ("id_books", "id_hashtags")

我想拥有一个提供如下输出的API：

[
    {
        "id_books": 1,
        "title": "The Hobbit",
        "hashtags": [
            {
                "id_hashtags": 1,
                "hashtag": "fantasy"
            },
            {
                "id_hashtags": 2,
                "hashtag": "fiction"
            },
            {
                "id_hashtags": 3,
                "hashtag": "middle earth"
            },
        ]
    }
]    

为此，我在网上找到了一些示例，使用DRF对上述模型进行了序列化：

#serializers.py
from rest_framework import serializers
from app.models import …