retrieve objects response snippet 1.2 更新 example 端點 參數

1.Wrapping API views
1.1 @api_view 用於處理基於函數的視圖.
1.2 APIView 用於處理基於類的視圖.
2.簡化上一章中的views.py，這裏我們不在使用JSONParser
"""
為了利用響應不再硬連接到單一內容類型這一事實，
讓我們向API端點添加對格式後綴的支持。使用格式後綴可以提供顯式引用給定格式的url，
這意味著我們的API將能夠處理url，比如http://example.com/api/items/4.json。
首先向這兩個視圖添加一個format關鍵字參數，就像這樣
"""
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


@api_view([‘GET‘, ‘POST‘])
def snippet_list(request, format=None):
"""
List all code snippets, or create a new snippet.
"""
if request.method == ‘GET‘:
snippets = Snippet.objects.all()
serializer = SnippetSerializer(snippets, many=True)
return Response(serializer.data)

elif request.method == ‘POST‘:
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)



@api_view([‘GET‘, ‘PUT‘, ‘DELETE‘])
def snippet_detail(request, pk, request=None):
"""
Retrieve, update or delete a code snippet.
"""
try:
snippet = Snippet.objects.get(pk=pk)
except Snippet.DoesNotExist:
return Response(status=status.HTTP_404_NOT_FOUND)

if request.method == ‘GET‘:
serializer = SnippetSerializer(snippet)
return Response(serializer.data)

elif request.method == ‘PUT‘:
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)

elif request.method == ‘DELETE‘:
snippet.delete()
return Response(status=status.HTTP_204_NO_CONTENT)

3.更新urls
from django.urls import path
from rest_framework.urlpatterns import format_suffix_patterns
from snippets import views

urlpatterns = [
path(‘snippets/‘, views.snippet_list),
path(‘snippets/<int:pk>‘, views.snippet_detail),
]

urlpatterns = format_suffix_patterns(urlpatterns)

django-rest-framework(DRF)閱讀筆記2