尝试在序列化程序UserSerializer上获取字段email的值时出现AttributeError

Question

创建Django REST FRamework API。使用Abstract User和email是默认的日志记录参数。

/ post /

处的AttributeError

尝试在序列化程序email上获取字段UserSerializer的值时出现AttributeError。 序列化程序字段的名称可能不正确，并且与Post实例上的任何属性或键都不匹配。 原始异常文本为：“发布”对象没有属性“电子邮件”。

class PostSerializer(ModelSerializer):
    category  = ReadOnlyField(source='category.name')
    author = UserSerializer(source='user.email')
    #question = serializers.CharField(source='question.text', read_only=True)


    class Meta:
        model = Post
        fields = '__all__'


class User(AbstractUser):
    username = models.CharField("Username", max_length=50, unique=True)
    email = models.EmailField("Email Address", max_length=254, unique=True)

    USERNAME_FIELD = 'email'
    REQUIRED_FIELDS = ['username', 'first_name', 'last_name']



class Post(models.Model):
    STATUS_CHOICES = (
        ('draft', 'Draft'),
        ('published', 'Published'),
    )
    title = models.CharField(max_length=250)
    slug = models.SlugField(max_length=250, unique_for_date='publish')
    author = models.ForeignKey(User, related_name='posts', on_delete=models.CASCADE, to_field='email')
    category = models.ForeignKey(Category, related_name='categorys', on_delete=models.CASCADE)
    body = models.TextField()
    image = models.ImageField(upload_to='blog/%Y/%m/%d', blank=True)
    publish = models.DateTimeField(default=timezone.now)
    rating = models.IntegerField("Rumor Rate", validators=[MaxValueValidator(5), MinValueValidator(0)], default=1, null=True)
    created = models.DateTime[![enter image description here][1]][1]Field(auto_now_add=True)
    updated = models.DateTimeField(auto_now=True)
    status = models.CharField(max_length=10, choices=STATUS_CHOICES, default='draft')

Answer 1

我想您想在请求Post端点时在作者字段中返回作者的电子邮件。您还可以将序列化程序中的author字段转换为ReadOnlyField（作为category）并指定source='author.email'，因为模型外键的命名如下：

class PostSerializer(ModelSerializer):
    category = ReadOnlyField(source='category.name')
    author = ReadOnlyField(source='author.email')

    # ...