ForiegnKey字段序列化程序在Django Rest框架 [英] ForiegnKey field serializer in Django Rest framework

问题描述

在发布此问题之前，我已经阅读了关于SOF的几个问题。但是他们从2012年开始也很混乱。
，例如 Django Rest Framework - 获取相关模型字段在序列化器中

我的问题很简单

models.py

  class User（models.Model）：
 username = models.CharField（max_length = 100，unique = True）
密码= models.CharField（max_length = 100，null = False，blank = False）
 
 class Car（models.Model）：
 user = models.ForeignKey（User）
 car_name = models.CharField（max_length = 100，null = True，blank = True）
  

serializers.py

  class UserSerializer（serializers.ModelSerializer）：
 class Meta：
 model = User 
 fields =（'username'，'password'）
 
 class CarSerializer（serializers.ModelSerializer）：
 #user =？我应该写什么或有更好的方法序列化汽车对象
 class Meta：
 model = Car 
 fields =（'user'，'car_name'）
  

views.py

  class UserViewSet（viewsets.ModelViewSet）：
 queryset = User.objects.all（）
 serializer_class = UserSerializer 
 
 class CarViewSet（viewsets.ModelViewSet）：
 queryset = Car .objects.all（）
 serializer_class = CarSerializer 
  

请建议所有可能的方法。 p>

1个查询。哪一个更好的是 ModelSerializer 或 HyperlinkModelSerializer 。当我看到包含这两个不同的答案。

解决方案

你只需要做：

 code> class CarSerializer（serializers.ModelSerializer）：
 user = UserSerializer（）
 class Meta：
 model = Car 
 fields =（'user'，'car_name' ）
  

此外，您应该查看 serializers.Field 和序列化程序的善意.SerializerMethodField ，您可以与他们一起玩，并根据需要自定义您的响应数据。

关于 HyperlinkedModelSerializer - ModelSerializer 非常清楚 here ：

HyperlinkedModelSerializer 与 ModelSerializer 有以下区别：

• 默认情况下不包含pk字段。


• 它包含一个url字段，使用超链接IDentityField 。


• 关系使用 HyperlinkedRelatedField ，而不是 PrimaryKeyRelatedField 。

希望有所帮助。

Before posting this question I've read few questions on SOF. but they are from 2012 and very confusing as well. for e.g Django Rest Framework - Get related model field in serializer

my question is very straight forward

models.py

class User(models.Model):
    username = models.CharField(max_length=100,unique=True)
    password = models.CharField(max_length=100,null=False,blank=False)

class Car(models.Model):
    user = models.ForeignKey(User)
    car_name = models.CharField(max_length=100,null=True,blank=True)

serializers.py

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('username','password' )

class CarSerializer(serializers.ModelSerializer):
    #user = ?? what should I write or is there any better approach for serializing Car objects
    class Meta:
        model = Car
        fields = ('user','car_name')

views.py

class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer

class CarViewSet(viewsets.ModelViewSet):
    queryset = Car.objects.all()
    serializer_class = CarSerializer

Please suggest all possible approaches.

1 more query. which one is better ModelSerializer or HyperlinkModelSerializer. as I saw different different answers containing these two.

解决方案

You just need to do:

class CarSerializer(serializers.ModelSerializer):
    user = UserSerializer()
    class Meta:
        model = Car
        fields = ('user','car_name')

that is all.

Also, you should take a look to the kindnesses of serializers.Field and serializers.SerializerMethodField, you can play with them and customize your response data as much as you wish.

As to the question around HyperlinkedModelSerializer-ModelSerializer, very clear here:

The HyperlinkedModelSerializer has the following differences from ModelSerializer:

• It does not include the pk field by default.
• It includes a url field, using HyperlinkedIdentityField.
• Relationships use HyperlinkedRelatedField, instead of PrimaryKeyRelatedField.

Hope that helps.

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