Django - get_queryset()缺少1个必需的位置参数:' request'

时间:2017-11-27 11:08:07

标签: python django

我尝试使用REST Framework创建一个API,用于将文件上传到服务器,我的代码在下面。

如果您有任何其他简单的方法,请发布您的代码。

models.py

from django.db import models

# Create your models here.

class FileUploader(models.Model):
    file = models.FileField()
    name = models.CharField(max_length=100) #name is filename without extension
    version = models.IntegerField(default=0)
    upload_date = models.DateTimeField(auto_now=True, db_index=True)
    owner = models.ForeignKey('auth.User', related_name='uploaded_files')
    size = models.IntegerField(default=0)

    def __str__(self):
        return self.name

serializers.py

class FileUploaderSerializer(serializers.ModelSerializer):
    class Meta:
        model=FileUploader
        fields='__all__'
        read_only_fields = '__all__'
    def validate(self, validated_data):
        validated_data['owner'] = self.context['request'].user
        validated_data['name'] = os.path.splitext(validated_data['file'].name)[0]
        validated_data['size'] = validated_data['file'].size
        return validated_data
    def create(self,validated_data):
        return FileUploader.objects.create(**validated_data)

views.py

class FileUploaderViewSet(viewsets.ModelViewSet):
    serializer_class = FileUploaderSerializer
    parser_classes=(MultiPartParser,FormParser)
    def get_queryset(self,request, *args, **kwargs):
        qs = super(FileUploaderViewSet, self).get_queryset(self,request, *args, **kwargs)
        qs = qs.filter(owner=self.request.user)
        return qs

urls.py

from django.conf.urls import url
from django.conf.urls import url,include
from django.contrib import admin
from rest_framework import routers
from rest_framework.authtoken.views import obtain_auth_token
from rest_framework.urlpatterns import format_suffix_patterns
from webapp import views
from webapp.views import(
    UserCreateAPIView,
    UserLoginAPIView,
    FileUploaderViewSet,
    )

router = routers.DefaultRouter()
router.register(r'upload', views.FileUploaderViewSet,base_name='file-view')

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^', include(router.urls)),
    #url(r'^upload/$',FileUploaderViewSet.as_view()),

]

我的要求是我需要将文件上传到服务器,并显示上传文件的详细信息。

这是我得到的错误!

  

环境:

     

请求方法:GET请求网址:http://127.0.0.1:8000/upload/

     

Django版本:1.11.7 Python版本:3.6.3已安装的应用程序:   [' django.contrib.admin',' django.contrib.auth',   ' django.contrib.contenttypes',' django.contrib.sessions',   ' django.contrib.messages',' django.contrib.staticfiles',   ' rest_framework',' webapp']已安装的中间件:   [' django.middleware.security.SecurityMiddleware&#39 ;,   ' django.contrib.sessions.middleware.SessionMiddleware&#39 ;,   ' django.middleware.common.CommonMiddleware&#39 ;,   ' django.middleware.csrf.CsrfViewMiddleware&#39 ;,   ' django.contrib.auth.middleware.AuthenticationMiddleware&#39 ;,   ' django.contrib.messages.middleware.MessageMiddleware&#39 ;,   ' django.middleware.clickjacking.XFrameOptionsMiddleware']

     

回溯:

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ exception.py"   在内心     41. response = get_response(request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     187. response = self.process_exception_by_middleware(e,request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     185. response = wrapped_callback(request,* callback_args,** callback_kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ views \ decorators \ csrf.py"   在wrapped_view中     58. return view_func(* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ viewsets.py"在   视图     90.返回self.dispatch(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     489. response = self.handle_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   handle_exception     449. self.raise_uncaught_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     486. response = handler(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ mixins.py"在列表中     40. queryset = self.filter_queryset(self.get_queryset())

     

异常类型:TypeError at / upload / Exception值:get_queryset()   缺少1个必要的位置参数:'请求'

更新了 views.py 文件,如下所示

from django.shortcuts import render
from django.db.models import Q
from django.http import HttpResponse
from django.shortcuts import get_object_or_404
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from rest_framework.parsers import MultiPartParser, FormParser

from rest_framework import viewsets
from rest_framework.status import HTTP_200_OK,HTTP_400_BAD_REQUEST
from .models import employees
from .serializers import (
    employeesSerializer,
    FileUploaderSerializer,
    )
from django.contrib.auth import get_user_model
from rest_framework.generics import (
    CreateAPIView,
    DestroyAPIView,
    ListAPIView,
    RetrieveAPIView,
    RetrieveUpdateAPIView,
    )

from rest_framework.permissions import(
    AllowAny,
    IsAuthenticated,
    IsAdminUser,
    IsAuthenticatedOrReadOnly,
    )

class employeeList(APIView):
    def get(self,request):
        employees1=employees.objects.all()
        serializer=employeesSerializer(employees1,many=True)
        return Response(serializer.data)


    def post(self):
        pass

User=get_user_model()

from .serializers import(
    UserCreateSerializer,
    UserLoginSerializer,
    )

class UserCreateAPIView(CreateAPIView):
    serializer_class=UserCreateSerializer
    queryset=User.objects.all()


class UserLoginAPIView(APIView):
    permission_classes=[AllowAny]
    serializer_class=UserLoginSerializer
    def post(self,request,*args,**kwargs):
        data=request.data
        serializer=UserLoginSerializer(data=data)
        if serializer.is_valid(raise_exception=True):
            new_data=serializer.data
            return Response(new_data,status=HTTP_200_OK)
        return Response(serializer.errors,status=HTTP_400_BAD_REQUEST)

class FileUploaderViewSet(viewsets.ModelViewSet):
    serializer_class = FileUploaderSerializer
    parser_classes=(MultiPartParser,FormParser)

 # overriding default query set
    #queryset = LayerFile.objects.all()

    def get_queryset(self, *args, **kwargs):
        qs = super(FileUploaderViewSet, self).get_queryset(self, *args, **kwargs)
        qs = qs.filter(owner=self.request.user)
        return qs

回溯:

  

环境:

     

请求方法:GET请求网址:http://127.0.0.1:8000/upload/

     

Django版本:1.11.7 Python版本:3.6.3已安装的应用程序:   [' django.contrib.admin',' django.contrib.auth',   ' django.contrib.contenttypes',' django.contrib.sessions',   ' django.contrib.messages',' django.contrib.staticfiles',   ' rest_framework',' webapp']已安装的中间件:   [' django.middleware.security.SecurityMiddleware&#39 ;,   ' django.contrib.sessions.middleware.SessionMiddleware&#39 ;,   ' django.middleware.common.CommonMiddleware&#39 ;,   ' django.middleware.csrf.CsrfViewMiddleware&#39 ;,   ' django.contrib.auth.middleware.AuthenticationMiddleware&#39 ;,   ' django.contrib.messages.middleware.MessageMiddleware&#39 ;,   ' django.middleware.clickjacking.XFrameOptionsMiddleware']

     

回溯:

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ exception.py"   在内心     41. response = get_response(request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     187. response = self.process_exception_by_middleware(e,request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     185. response = wrapped_callback(request,* callback_args,** callback_kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ views \ decorators \ csrf.py"   在wrapped_view中     58. return view_func(* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ viewsets.py"在   视图     90.返回self.dispatch(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     489. response = self.handle_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   handle_exception     449. self.raise_uncaught_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     486. response = handler(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ mixins.py"在列表中     40. queryset = self.filter_queryset(self.get_queryset())

     

文件" F:\ proj \ env \ myproject \ webapp \ views.py"在get_queryset中     74. qs = super(FileUploaderViewSet,self).get_queryset(self,* args,** kwargs)

     

异常类型:TypeError at / upload / Exception值:get_queryset()   需要1个位置参数但是给出了2个

更改获取查询集后的新跟踪

class FileUploaderViewSet(viewsets.ModelViewSet):
    serializer_class = FileUploaderSerializer
    parser_classes=(MultiPartParser,FormParser)

 # overriding default query set

    def get_queryset(self):
        qs = super(FileUploaderViewSet, self).get_queryset()
        qs = qs.filter(owner=self.request.user)
        return qs
  

环境:

     

请求方法:GET请求网址:http://127.0.0.1:8000/upload/

     

Django版本:1.11.7 Python版本:3.6.3已安装的应用程序:   [' django.contrib.admin',' django.contrib.auth',   ' django.contrib.contenttypes',' django.contrib.sessions',   ' django.contrib.messages',' django.contrib.staticfiles',   ' rest_framework',' webapp']已安装的中间件:   [' django.middleware.security.SecurityMiddleware&#39 ;,   ' django.contrib.sessions.middleware.SessionMiddleware&#39 ;,   ' django.middleware.common.CommonMiddleware&#39 ;,   ' django.middleware.csrf.CsrfViewMiddleware&#39 ;,   ' django.contrib.auth.middleware.AuthenticationMiddleware&#39 ;,   ' django.contrib.messages.middleware.MessageMiddleware&#39 ;,   ' django.middleware.clickjacking.XFrameOptionsMiddleware']

     

回溯:

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ exception.py"   在内心     41. response = get_response(request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     187. response = self.process_exception_by_middleware(e,request)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ core \ handlers \ base.py"在   _get_response     185. response = wrapped_callback(request,* callback_args,** callback_kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ django \ views \ decorators \ csrf.py"   在wrapped_view中     58. return view_func(* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ viewsets.py"在   视图     90.返回self.dispatch(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     489. response = self.handle_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   handle_exception     449. self.raise_uncaught_exception(exc)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ views.py"在   调度     486. response = handler(request,* args,** kwargs)

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ mixins.py"在列表中     40. queryset = self.filter_queryset(self.get_queryset())

     

文件" F:\ proj \ env \ myproject \ webapp \ views.py"在get_queryset中     74. qs = super(FileUploaderViewSet,self).get_queryset()

     

文件" F:\ proj \ env \ lib \ site-packages \ rest_framework \ generics.py"在   get_queryset     68.%self。 class 名称

     

异常类型:/ upload / Exception值的AssertionError:   ' FileUploaderViewSet'应该包含queryset属性,或者   覆盖get_queryset()方法。

4 个答案:

答案 0 :(得分:1)

get_queryset()不期望'请求'。也许删除“请求”'来自get_queryset()的参数。供参考,您可以查看: get_queryset()

也许是这样的:

def get_queryset(self, *args, **kwargs):
    qs = your_model.objects.all()
    qs = qs.filter(owner=self.request.user)
    return qs

答案 1 :(得分:1)

Sayse说,只需要self。但您不必将self传递给get_queryset()self只是一个实例,super本身就是自我实例。

所以只需从

更改以下行
super(FileUploaderViewSet, self).get_queryset(self, *args, **kwargs)

super(FileUploaderViewSet, self).get_queryset()

look at the code snippet here

<强>更新

您确定,您的get_queryset是否在同一个班级?

您是否尝试过编写queryset = Model.objects.all()

我在您的视图中看不到model = ModelName

view class应该有以下字段。

def get_queryset(self):
    return queryset

serializer_class = SerializerClass
model = ModelName

答案 2 :(得分:0)

get_queryset仅需要self作为参数。

只需删除其他参数。

答案 3 :(得分:0)

get_queryset不期望请求参数,并且DRF基类不会传递它。但它可用作实例属性。您应该从方法签名和超级调用中删除它,并通过self.request访问它。

def get_queryset(self, *args, **kwargs):
    qs = super(FileUploaderViewSet, self).get_queryset(*args, **kwargs)
    qs = qs.filter(owner=self.request.user)
    return qs