Django REST框架，并从POST表单创建两个表项 [英] Django REST framework and creating two table entries from a POST form

问题描述

我想使用DRF可浏览API POST表单在两个表（日志和帖子）中创建条目。

I want to create entries in two tables (Log and Post) using the DRF Browseable API POST form.

下面的示例是有创意的，但它概述了我正在做的事情。

The example below is contrived, but it outlines what I am trying to do.

class Post(models.Model):
    info = models.CharField()

class Log(TimeStampedModel):
    ip = models.GenericIPAddressField(('IP Address'))
    name = models.CharField()
    data = models.ForeignKey(Post)                                       

我想使用可浏览的API提交表单来创建一个日志条目。以下是序列化程序：

I want to use the browseable API to submit a form to create a Log entry. Here are the serializers:

class PostSerializer(serializers.ModelSerializer):
    class Meta:
        model = Post
        fields = ('info',)

class LogSerializer(serializers.ModelSerializer):                          
    data = serializers.Field()

    class Meta:
        model = Log
        fields = ('ip', 'name', 'data')

上面的问题是 serializer.Field 是只读的，不会显示在POST表单上。如果我将其更改为CharField，它会显示，但是我收到一个错误，因为Post的一个实例不仅仅是Post对象的一个​​字段。

The problem with the above is that serializer.Field is read only so does not show up on the POST form. If I change it to CharField it shows up, but then I get an error because an instance of a Post is expected not just a field of the Post object.

这里是我的观点：

class LogMixin(object):
    queryset = Log.objects.all()                                           
    serializer_class = LogSerializer



class LogList(LogMixin, ListCreateAPIView):
    pass


class LogDetail(LogMixin, RetrieveUpdateDestroyAPIView):
    pass

这样做的正确方法是什么？

What's the correct way of doing this?

推荐答案

从我可以告诉你想要创建一个嵌套的Log对象。有两种方法：

From what I can tell you want to create a nested Log object. There are 2 ways of doing this:

1. 发送2 POST 请求，一个创建Post，另一个创建日志包含从API接收的HTTP 200数据。


2. （Django和最佳方式）将数据全部发送到一个 POST 并解析服务器端。 Django Rest Framework会为您处理这个问题。

1. Send 2 POST Requests, One to create the Post, and the other to create the Log contained the received HTTP 200 data from the API.
2. (Django and best way) Send the data all in one POST and parse it server side. Django Rest Framework takes care of this for you.

我已经更改了代码，使其运行起来。
来源

I have changed your code so that it should work. Source

class LogSerializer(serializers.ModelSerializer):                          
   class Meta:
        model = Log
        fields = ('ip', 'name')


class PostSerializer(serializers.ModelSerializer):
    log = LogSerializer()
    class Meta:
        model = Post
        fields = ('info', 'log')

views.py

import generics

class PostCreateAPIView(generics.CreateAPIView):
    model = Post
    serializer_class = PostSerializer

然后你可以发送一个 POST info'，'ip'和'name'。

Then you can send a POST Request containing 'info', 'ip', and 'name'.

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