def post_detail(request, pk):
# 根据 pk 值获取对应的 post 实例
post = get_object_or_404(Post, pk=pk)
# 首先判断是否存在这个 post，不存在直接返回 404 NOT FOUND
# 如果 settings.py 下的 DEBUG 属性设置为 True 的话，django 会不展示 404 页面，设置成 False 即可
if post is None:
return HttpResponse(status=404)
# 如果 request 是 GET 方法，则直接展示对应 pk 的 post
if request.method == 'GET':
serializer = PostSerializer(post)
# 将序列化后的数据转换成 json 展示
return JsonResponse(serializer.data, status=200)
# 如果 request 是 PUT 方法，则解析 request 中的参数，
# 进行校验是否合理，合理则更新，否则返回 400 BAD REQUEST
elif request.method == 'PUT':
data = JSONParser().parse(request)
serializer = PostSerializer(post, data=data)
if serializer.is_valid():
serializer.save()
return JsonResponse(serializer.data)
return JsonResponse(serializer.errors, status=400)
# 如果 request 是 DELETE 方法，则直接删除
elif request.method == 'DELETE':
post.delete()
return HttpResponse(status=204)
def put(self, request, pk, format=None):
post = self.get_object(pk=pk)
serializer = PostSerializer(post, data=request.data)
if serializer.is_valid():
# 记得先 clear，然后判断是否上传了 id，上传了 id 需要判断是否多个
post.tags.clear()
if request.data['tags']:
if "," in request.data['tags']:
# 我们需要提取 request.data 中 tags 所对应的值，然后通过切割字符串取出 id
for i in request.data['tags'].split(","):
post.tags.add(i)
else:
post.tags.add(request.data['tags'])
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
def post_list_view(request, format=None):
if request.method == 'GET':
posts = Post.objects.all()
serializer = PostSerializer(posts, many=True)
return Response(serializer.data, status=status.HTTP_200_OK)
elif request.method == 'POST':
serializer = PostSerializer(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 post_list(request):
# 如果是 GET 请求则返回所有的列表
if request.method == "GET":
posts = Post.objects.all()
serializer = PostSerializer(posts, many=True)
return JsonResponse(serializer.data, safe=False, status=200)
# 如果是 POST 请求则保存数据
elif request.method == "POST":
# 将 request 中的参数取出来进行序列化
data = JSONParser().parse(request)
serializer = PostSerializer(data=data)
# 判断是否有效的数据
if serializer.is_valid():
# 有效数据保存，返回 201 CREATED
serializer.save()
return JsonResponse(serializer.data, status=201)
# 无效则返回 400 BAD_REQUEST
return JsonResponse(serializer.errors, status=400)
def post_detail_view(request, pk, format=None):
post = get_object_or_404(Post, pk=pk)
if post is None:
return Response(status=status.HTTP_404_NOT_FOUND)
if request.method == 'GET':
serializer = PostSerializer(post)
return Response(serializer.data, status=status.HTTP_200_OK)
elif request.method == 'PUT':
serializer = PostSerializer(post, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data)
return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
elif request.method == 'DELETE':
post.delete()
return Response(status=status.HTTP_204_NO_CONTENT)
def post(self, request, format=None):
serializer = PostSerializer(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 get(self, request, format=None):
posts = Post.objects.all()
serializer = PostSerializer(posts, many=True)
return Response(serializer.data, status=status.HTTP_200_OK)
def get(self, request, pk, format=None):
serializer = PostSerializer(self.get_object(pk=pk))
return Response(serializer.data, status=status.HTTP_200_OK)