我在遵循Django restful框架教程时,在“使用API进行身份验证”步骤时遇到了一个错误。我已经追溯了自己,但似乎看不出哪里出了问题。基本上,当我去发布到我的API时,我得到了一个错误,见下文。理想情况下,我还想设置权限,状态为“访问被拒绝”,除非对象所有者-任何关于这方面的建议将不胜感激。在
http -a jimmynos:password POST http://127.0.0.1:8000/snippets/ code="print 789"
一些错误:
^{pr2}$在视图.py在
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
from django.http import Http404
from rest_framework.views import APIView
from rest_framework.response import Response
from rest_framework import status
from django.contrib.auth.models import User
from snippets.serializers import UserSerializer
from rest_framework import generics
from rest_framework import permissions
from snippets.permissions import IsOwnerOrReadOnly
class UserList(generics.ListAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
class UserDetail(generics.RetrieveAPIView):
queryset = User.objects.all()
serializer_class = UserSerializer
class SnippetList(APIView):
"""
List all snippets, or create a new snippet.
"""
permission_classes = (permissions.IsAuthenticatedOrReadOnly,IsOwnerOrReadOnly,)
def get(self, request, format=None):
#snippets = Snippet.objects.all()
snippets = Snippet.objects.filter(owner=self.request.user)
serializer = SnippetSerializer(snippets, many=True)
return Response(serializer.data)
def post(self, request, format=None):
serializer = SnippetSerializer(data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data, status=status.HTTP_201_CREATED)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def perform_create(self, serializer):
serializer.save(owner=self.request.user)
class SnippetDetail(APIView):
"""
Retrieve, update or delete a snippet instance.
"""
permission_classes = (permissions.IsAuthenticatedOrReadOnly,IsOwnerOrReadOnly,)
def get_object(self, pk):
try:
return Snippet.objects.get(pk=pk)
except Snippet.DoesNotExist:
raise Http404
def get(self, request, pk, format=None):
snippet = self.get_object(pk)
serializer = SnippetSerializer(snippet)
return Response(serializer.data)
def put(self, request, pk, format=None):
snippet = self.get_object(pk)
serializer = SnippetSerializer(snippet, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def delete(self, request, pk, format=None):
snippet = self.get_object(pk)
snippet.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
在序列化程序.py在
from rest_framework import serializers
from snippets.models import Snippet, LANGUAGE_CHOICES, STYLE_CHOICES
from django.contrib.auth.models import User
class SnippetSerializer(serializers.ModelSerializer):
owner = serializers.ReadOnlyField(source='owner.username')
class Meta:
model = Snippet
#owner = serializers.ReadOnlyField(source='owner.username')
fields = ('id', 'title', 'code', 'linenos', 'language', 'style', 'owner')
class UserSerializer(serializers.ModelSerializer):
snippets = serializers.PrimaryKeyRelatedField(many=True, queryset=Snippet.objects.all())
class Meta:
model = User
fields = ('id', 'username', 'snippets')
在权限.py在
from rest_framework import permissions
class IsOwnerOrReadOnly(permissions.BasePermission):
"""
Custom permission to only allow owners of an object to edit it.
"""
def has_object_permission(self, request, view, obj):
# Read permissions are allowed to any request,
# so we'll always allow GET, HEAD or OPTIONS requests.
if request.method in permissions.SAFE_METHODS:
return True
# Write permissions are only allowed to the owner of the snippet.
return obj.owner == request.user
这个错误一定与
owner = serializers.ReadOnlyField(source='owner.username')
或者
def perform_create(self, serializer):
serializer.save(owner=self.request.user)
在模型.py在
from django.db import models
from pygments.lexers import get_all_lexers
from pygments.styles import get_all_styles
LEXERS = [item for item in get_all_lexers() if item[1]]
LANGUAGE_CHOICES = sorted([(item[1][0], item[0]) for item in LEXERS])
STYLE_CHOICES = sorted((item, item) for item in get_all_styles())
class Snippet(models.Model):
created = models.DateTimeField(auto_now_add=True)
title = models.CharField(max_length=100, blank=True, default='')
code = models.TextField()
linenos = models.BooleanField(default=False)
language = models.CharField(choices=LANGUAGE_CHOICES, default='python', max_length=100)
style = models.CharField(choices=STYLE_CHOICES, default='friendly', max_length=100)
owner = models.ForeignKey('auth.User', related_name='snippets')
highlighted = models.TextField()
class Meta:
ordering = ('created',)
环境:
Python 2.7.10 on MAC
Django==1.9.9
djangorestframework==3.4.6
Pygments==2.1.3
确保您还将“owner”添加到内部元类的字段列表中。在
字段=('id','title','code','linenos','language','style')
字段=('id','title','code','linenos','language','style','owner')
错误应该是
owner = serializers.ReadOnlyField(source='owner.username')
序列化程序需要所有者来创建代码段实例。在
如果将owner设置为readonly,则缺少owner字段,因此无法创建snippet实例。在
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