python - 属性错误 : 'tuple' object has no attribute 'values'

Question

我正在尝试构建一个 API 以通过 dropzone 上传图像。

以下是我的serializer.py的代码

from rest_framework import serializers
from models import User
from models import Photo

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        field = ('id', 'facebook_id', 'first_name', 'last_name', 'access_token')

class PhotoSerializer(serializers.HyperlinkedModelSerializer):
    owner = UserSerializer()
    class Meta:
        model = Photo
        fields = ('id', 'url', 'image', 'owner')
        readonly_fields = ('url', 'image')

以下是我的models.py

from django.db import models
from django.utils.translation import ugettext_lazy as _

class User(models.Model):
    facebook_id = models.IntegerField
    first_name = models.CharField(max_length=200)
    last_name = models.CharField(max_length=200)
    email = models.CharField(max_length=150)
    class Meta:
        db_table = "users"


def upload_to(instance, filename):
    return 'user_photos/{}/{}'.format(instance.user_id, filename)


class Photo(models.Model):
    image = models.ImageField(_('image'), blank=True, null=True, upload_to='item_images')
    owner = models.ForeignKey(User,      related_name='uploaded_item_images',blank=False,)
    class Meta:
        db_table = "user_photos"

当我从浏览器访问 API 时，出现以下错误

'tuple' object has no attribute 'values'
Request Method: GET
Request URL:    http://127.0.0.1:8000/myappapi/api/user_photos/1/
Django Version: 1.9.1
Exception Type: AttributeError
Exception Value:    
'tuple' object has no attribute 'values'
Exception Location: D:\virtualenv\myapp_api\myapp_backend\rest_framework\serializers.py in _readable_fields, line 353

我是 DRF 新手。

请告诉我我在这里做错了什么。

提前致谢。

苏卡尔波。

Answer 1

你打错了 - 它应该是 fields，而不是 field:

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ('id', 'facebook_id', 'first_name', 'last_name', 'access_token')
      # HERE ^