DjangoRestFramework - 如何序列特定ForiegnKey场，而不是PK值

Question

这是我的模型：

class Post(models.Model): 
    owner = models.ForeignKey(User, related_name="%(app_label)s%(class)s_set") 
    usersVoted = models.ManyToManyField(User, blank=True) 
    post = models.CharField(max_length=400) 

，这是我的串行：

class PostSerializer(serializers.ModelSerializer): 

    class Meta: 
     model = Post 
     fields = ('owner', 'usersVoted', 'post') 
     read_only_fields = ('owner', 'usersVoted') 

    def create(self, validated_data): 
     drop = Drop(
       owner = User.objects.get(username='TestUser'), 
       post = validated_data['post'], 
     ) 

业主有一个ForeignKey到默认的Django用户模型。目前，当我序列化帖子时，所有者是用户的pk值。我如何让拥有者成为用户的用户名呢？

Answer 1

你可以这样做：

class PostSerializer(serializers.ModelSerializer): 
    owner = serializers.ReadOnlyField(source="owner.username") 

    class Meta: 
     model = Post 
     fields = ('owner', 'usersVoted', 'post') 
     read_only_fields = ('owner', 'usersVoted') 

    def create(self, validated_data): 
     drop = Drop(
       owner = User.objects.get(username='TestUser'), 
       post = validated_data['post'], 
     ) 

Answer 2

您应该使用SlugRelatedField提供的用户名是唯一的。这将使字段读/写非常方便。 文档可在http://www.django-rest-framework.org/api-guide/relations/#slugrelatedfield