Django：通过参数序列化具有多对多关系的模型

Question

模型定义了一个文章和一个作者类。它们以多对多的关系联系在一起。这种关系是通过自定义中间表定义的：

# 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()

序列化应该返回一个像这样的 JSON：

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

我已经确定了两种解决方案。

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

我尝试了这两个但没有成功。你知道另一种方法吗？

Answer 1

感谢您的反馈，我专注于 Django REST 框架并且它有效。以下是我编写的自定义序列化程序：

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

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

来源：

1. Include intermediary (through model) in responses in Django Rest Framework
2. https://bitbucket.org/snippets/adautoserpa/MeLa/django-rest-framework-manytomany-through