restframework 'tuple'对象没有属性'_meta'

Django引发了下一个异常：

restframework'tuple'对象没有属性'_meta'

模型

class BDetail(models.Model):
   lat = models.FloatField(blank=True, null=True)
   lng = models.FloatField(blank=True, null=True)

   class Meta:
       # managed = False
       db_table = 'b_detail'

视图

from .models import BDetail
from .serializers import BDetailSerializer
from rest_framework import viewsets

class BDetailList(viewsets.ModelViewSet):
        queryset = BDetail.objects.all()
        serializer_class = BDetailSerializer

网址

from django.conf.urls import url, include
from bdetail import views
from rest_framework import routers

router = routers.DefaultRouter()
router.register(r'bdetail', views.BDetailList)

urlpatterns = [
    url(r'^', include(router.urls), name='bdetail')
]

串行

from .models import BDetail
from rest_framework import serializers

class BDetailSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = BDetail,
        fields = ('lat', 'lng')

环境：

请求方法：GET请求URL：http://apiix.verinmuebles.dev/v1/bdetail/

追溯：

文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/django/core/handlers/exception.py”在内部39. response = get_response（request）File“ /var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/django/core/handlers/base.py“in _get_response 187. response = self.process_exception_by_middleware（e，request）File _get_response 185中的“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/django/core/handlers/base.py” . response = wrapped_callback（request，* callback_args，* * callback_kwargs）文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/django/views/decorators/csrf.py”在wrapped_view 58中 . 返回view_func（* args， ** kwargs）在视图87中输入文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/viewsets.py” . 返回self.dispatch（request，* args） ，** kwargs）发送47中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/views.py” 4. response = self.handle_exception（exc）handle_exception 434中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/views.py”self.raise_uncaught_exception （exc）文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/views.py”在dispatch 471中.response = handler（request，* args，* * kwargs）在列表45中输入文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/mixins.py” . 返回self.get_paginated_response（serializer.data）文件数据701中的“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py” . ret = super（ListSerializer，self）.data文件“/ var数据240中的/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py“ . self._data = self.to_representation（self.instance）文件”/ var / www / verinmuebles / current / Env / api / local / lib / python2.7 / site-packages / rest_framework / serializers.py“in to_representation 619.在to_representation 460中的可迭代文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py”中的项目的self.child.to_representation（item） . fields = self._readable_fields get 35中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/django/utils/functional.py”res = instance.dict [self.name] = self.func（instance）_readable_fields 354字段中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py”对于self.fields.values（）中的字段，在字段340中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py”中输入密钥， self.get_fields（） . items（）中的值：get_fields 946中的文件“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framework/serializers.py” . = model_meta.get_field_info（model）File“/var/www/verinmuebles/current/Env/api/local/lib/python2.7/site-packages/rest_framewor get_field_info中的k / utils / model_meta.py“36 . opts = model._meta.concrete_model._meta异常类型：/ v1 / bdetail / Exception值中的AttributeError：'tuple'对象没有属性'_meta'