Django-Rest-Framework 3.0 字段名称“<field>”对模型“ModelBase”无效

Question

错误信息

我刚刚试用了 Django-Rest-Framework 3.0 quickstart tutorial（顺便说一句很棒的介绍），在我自己的系统/表上实现它时遇到了这个错误。

ImproperlyConfigured at /calls/
Field name `Datecreated` is not valid for model `ModelBase`.

我很快用谷歌搜索了它，但找不到任何东西，所以我想保存这个解决方案，以防其他人（这也是全新的）遇到同样的问题。我粘贴了完整的代码，因为如果你在这个问题上遇到困难，你可能是新手，也许可以用它来看看它是如何组合在一起的。

表'CallTraceAttempts'

     CallTraceAttemptId  DateCreated ...
   1              95352  2009-04-10 04:23:58.0000
   2              95353  2009-04-10 04:24:08.0000

代码

### models.py in the 'lifeline' app
from __future__ import unicode_literals
from django.db import models

class CallTraceAttempts(models.Model):

    # Change these fields to your own table columns
    calltraceattemptid = models.FloatField(db_column='CallTraceAttemptId', blank=True, null=True, primary_key=True)  # Field name made lowercase.
    datecreated = models.DateTimeField(db_column='DateCreated', blank=True, null=True)  # Field name made lowercase.

    class Meta:
        managed = False # I don't want to create or delete tables
        db_table = 'CallTraceAttempts'  # Change to your own table


### urls.py
from django.conf.urls import patterns, include, url
from lifeline.models import CallTraceAttempts  # Change to your app instead of 'lifeline'
from rest_framework import routers, serializers, viewsets

# Serializers define the API representation
class CallTraceAttemptsSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = CallTraceAttempts
        fields = ('calltraceattemptid', 'Datecreated')

# ViewSets define the view behavior
class CallTraceAttemptsViewSet(viewsets.ModelViewSet):
    queryset = CallTraceAttempts.objects.all()
    serializer_class = CallTraceAttemptsSerializer

# Routers provide an easy way of automatically determining the URL conf
router = routers.DefaultRouter()
router.register(r'calls', CallTraceAttemptsViewSet)

urlpatterns = patterns('',
    url(r'^', include(router.urls)),
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
)

Answer 1

问题发生在urls.py 的“字段”下。确保序列化程序中的字段与 models.py 中的字段完全匹配（区分大小写）。

### urls.py    
#...
# Serializers define the API representation
class CallTraceAttemptsSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = CallTraceAttempts
        fields = ('calltraceattemptid', 'datecreated')   ### Issue was right here, earlier version had 'Datecreated'

Answer 2

class CallTraceAttemptsSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = CallTraceAttempts
        fields = '__all__'

将字段值更改为'all'，它需要所有字段值