Django:使用直通参数序列化具有多对多关系的模型 [英] Django: Serialize a model with a many-to-many relationship with a through argument
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问题描述
该模型定义了一个文章和一个作者类.它们以多对多的关系连接在一起.这种关系是通过自定义中间表定义的:
The model defines an Article and an Author classes. They are linked together with a many-to-many relationship. This relationship is defined through an custom intermediary table:
# 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()
序列化应该返回这样的 JSON:
The serialization should return a JSON like this:
#articles_json
{"fields":
{
"title": "A title",
"authors": [
{
"name":"Author 1",
"writing_order": 1
},
{
"name":"Author 2",
"writing_order": 2
}
}
}
}
我确定了两种解决方案.
I've identified two solutions.
- 这个建议单独序列化 AuthorOrder 字段.
- 第二个是使用 Django Rest 框架.
- This one suggests to serialize the AuthorOrder field separately.
- The second one is to use the Django Rest Framework.
我尝试了两个,但没有成功.你知道另一种方法吗?
I tried the twos but without success. Do you know another way to do it?
推荐答案
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:
Thanks to your feedback, I focused on Django REST framework and it works. Here are the custom serializers I've written:
# 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:
- 在响应中包含中介(通过模型)Django Rest 框架
- https://bitbucket.org/snippets/adautoserpa/MeLa/django-rest-framework-manytomany-through
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