Question

该模型定义了Article和Author类。它们以多对多的关系联系在一起。此关系通过自定义中间表定义：

# models.py
class Article(models.Model):
    title = models.CharField(max_length=500)
    authors = models.ManyToManyField(Author, through='AuthorOrder')

class Author(models.Model):
    name = models.CharField(max_length=255)

class AuthorOrder(models.Model):
    author = models.ForeignKey(Author)
    article = models.ForeignKey(Article)
    writing_order = models.IntegerField()

序列化应返回如下的JSON：

#articles_json
{"fields":
     {
         "title": "A title",
         "authors": [
             {
                 "name":"Author 1",
                 "writing_order": 1
             },
             {
                 "name":"Author 2",
                 "writing_order": 2
             }
         }
     }
}

我发现了两种解决方案。

This one建议单独序列化AuthorOrder字段。
第二个是use the Django Rest Framework。

我尝试了两次但没有成功。你知道另一种方法吗？

Answer 1

感谢您的反馈，我专注于Django REST框架，它的工作原理。以下是我编写的自定义序列化器：

# serializers.py
from rest_framework import serializers
from app.models import Article, AuthorsOrder


class AuthorsOrderSerializer(serializer.ModelSerializer):
    author_name = serializers.ReadOnlyField(source='author.name')

    class Meta:
        model = AuthorsOrder
        fields = ('writing_order', 'author_name')


class AuthorsOrderSerializer(serializer.ModelSerializer):
    authors = AuthorsOrderSerializer(source='authorsorder_set', many=True)

    class Meta:
        model = Article
        fields = ('title', 'authors')

来源：

Django：使用through参数序列化具有多对多关系的模型

1 个答案: