def put(self, request, *args, **kwargs):
"""
修改单个对象的全部字段
全部字段：指的是所有参与反序列化的字段
参数：要修改的值 要修改的图书的id
:return: 修改后的对象
"""
# 要修改的值
request_data = request.data
# 图书id
book_id = kwargs.get("id")
try:
book_obj = Book.objects.get(pk=book_id)
except Book.DoesNotExist:
return Response({"status": 400, "message": "图书不存在"})
# request_data: 前端传递过来的要修改的值 更新数据时需要校验
# TODO 需要指定关键字参数 instance 将要修改的对象传递给序列化器
book_serializer = BookModelSerializerV2(data=request_data,
instance=book_obj)
book_serializer.is_valid(raise_exception=True)
# 经过序列序列化器校验后，保存修改的值
# 如果调用序列化器时指定了关键字参数 instance, 则底层会调用update()完成更新
book = book_serializer.save()
return Response({
"status": 200,
"message": "修改成功",
"results": BookModelSerializerV2(book).data
})
def patch(self, request, *args, **kwargs):
"""
完成修改单个对象的某些字段
"""
request_data = request.data
book_id = kwargs.get("id")
try:
book_obj = Book.objects.get(pk=book_id)
except Book.DoesNotExist:
return Response({"status": 400, "message": "图书不存在"})
# 如果要修改部分字段，只需要指定参数partial=True即可
book_serializer = BookModelSerializerV2(data=request_data,
instance=book_obj,
partial=True)
book_serializer.is_valid(raise_exception=True)
book = book_serializer.save()
return Response({
"status": 200,
"message": "修改成功",
"results": BookModelSerializerV2(book).data
})
def post(self, request, *args, **kwargs):
"""
增加单个：{} 前端传递参数的格式 字典
增加多个：[{},{},{}] 列表中嵌套字典 一个字典是一个新增的
"""
request_data = request.data
if isinstance(request_data, dict): # 代表新增单个图书
many = False
elif isinstance(request_data, list): # 代表新增多个图书
# 如果一次新增多个对象 需要指定参数 many=True
many = True
else:
return Response({"status": 400, "message": "请求参数格式有误"})
# 将前端传递的参数交给反序列化器进行校验
serializer = BookModelSerializerV2(data=request_data, many=many)
# 校验数据是否合法 raise_exception: 一旦校验失败，立即抛出异常
serializer.is_valid(raise_exception=True)
book_obj = serializer.save()
return Response({
"status":
201,
"message":
"创建成功",
"results":
BookModelSerializerV2(book_obj, many=many).data
})
def get(self, request, *args, **kwargs):
"""
查询单个图书 查询所有图书
"""
book_id = kwargs.get("id")
if book_id:
book_obj = Book.objects.get(pk=book_id)
book_serializer = BookModelSerializerV2(book_obj).data
return Response({
"status": 200,
"message": "查询成功",
"results": book_serializer
})
else:
book_set = Book.objects.all()
book_set_serializer = BookModelSerializerV2(book_set,
many=True).data
return Response({
"status": 200,
"message": "查询成功",
"results": book_set_serializer
})
def put(self, request, *args, **kwargs):
# 修改单个对象的全部字段
request_data = request.data
book_id = kwargs.get("id")
try:
book_obj = Book.objects.get(pk=book_id)
except Book.DoesNotExist:
return Response({"status": 401, "message": "图书不存在"})
book_serializer = BookModelSerializerV2(data=request_data,
instance=book_obj)
book_serializer.is_valid(raise_exception=True)
book = book_serializer.save()
return Response({
"status": 203,
"message": "put succeed",
"results": BookModelSerializerV2(book).data
})
def post(self, request, *args, **kwargs):
request_data = request.data
# 判断增一个还是增多个
if isinstance(request_data, dict):
many = False
elif isinstance(request_data, list):
many = True
else:
return Response({"status": 400, "message": "请求参数格式有误"})
serializer = BookModelSerializerV2(data=request_data, many=many)
# 校验数据是否合法
serializer.is_valid(raise_exception=True)
book_obj = serializer.save()
return Response({
"status":
201,
"message":
"创建成功",
"results":
BookModelSerializerV2(book_obj, many=many).data
})
def put(self, request, *args, **kwargs):
# 要修改的值
request_data = request.data
# 图书id
book_id = kwargs.get("id")
try:
book_obj = Book.objects.get(pk=book_id)
except Book.DoesNotExist:
return Response({"status": 400, "message": "图书不存在"})
# request_data: 前端传递过来的要修改的值 更新数据时需要校验
book_serializer = BookModelSerializerV2(data=request_data,
instance=book_obj)
book_serializer.is_valid(raise_exception=True)
# 如果调用序列化器时指定了关键字参数 instance, 则底层会调用update()完成更新
book = book_serializer.save()
return Response({
"status": 200,
"message": "修改成功",
"results": BookModelSerializerV2(book).data
})
