django rest_framework入门三-Requests和Responses

这一节，我们介绍rest_framework的Requests和Responses对象，来替代django.http的HttpRequest和HttpResponse对象

1.Requests和Responses对象的特点

1)Request对象

request.data #处理任意数据，接收'POST','PUT'和'PATCH'方法。

2)Response对象

HttpResponse只能返回string，而Response可以对任意类型自动处理，更加方便。

3)状态码

rest_framework提供了状态码，使用它们替换数字可读性更强。

2.rest_framework编写视图

rest_framework提供了两种方法来编写视图：

1)基于函数视图的@api_view装饰器

2)基于类视图的APIView

3.使用示例

import json

from rest_framework import status
from rest_framework.decorators import api_view
from rest_framework.response import Response

from snippets.models import Snippet
from snippets.serializers import SnippetSerializer

# Create your views here.
@api_view(['GET', 'POST'])
def snippet_list(request):
    if request.method == 'GET':
        snippets = Snippet.objects.all()
        serializer = SnippetSerializer(snippets, many=True)
        result_type = type(serializer.data)
        result = serializer.data
        return Response(result)

    if request.method == 'POST':
        data = request.data
        serializer = SnippetSerializer(data=data)
        if serializer.is_valid():
            serializer.save()
            result = json.dumps(serializer.data)
            return Response(result, status = status.HTTP_201_CREATED)
        return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

可以对比和上节使用django的HttpResponse的区别，其实不大，个人觉得差别不大