Django rest framework

一、安装配置djangorestframework

   pip install djangorestframework

   pip install markdown

   pip install django-filter


配置setting文件

INSTALLED_APPS = [
    'rest_framework'
]

REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': ('rest_framework.permissions.IsAdminUser',),
    'PAGE_SIZE': 10
}

配置urls文件

urlpatterns = [
    ...
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]

二、创建一个简单的API，查看和管理user及gruop

1、创建一个serializers.py文件

from django.contrib.auth.models import User
from rest_framework import serializers

# Serializers define the API representation.
class UserSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = User
        fields = ('url', 'username', 'email', 'is_staff')

2、定义视图函数

from django.contrib.auth.models import User
from rest_framework import viewsets

# ViewSets define the view behavior.
class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer

3、配置url

from django.conf.urls import url, include
from rest_framework import routers
 
  # Routers provide an easy way of automatically determining the URL conf.router = routers.DefaultRouter()router.register(r'users', UserViewSet)# Wire up our API using automatic URL routing.# Additionally, we include login URLs for the browsable API.urlpatterns = [ url(r'^', include(router.urls)), url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))] 
  
 
  
 
  
 
  
 
  
三、序列化
 
  
1、创建一个简单的model
 
  
 
  
from django.db import models

# Create your models here.
class Snippet(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    title = models.CharField(max_length=100, blank=True, default='')
    linenos = models.BooleanField(default=False)

    class Meta:
        ordering = ('created',)
 
  
 2、创建serializers.py文件 
  
class SnippetSerializers(serializers.ModelSerializer):
    class Meta:
        model = Snippet
        fields = ('id', 'title', 'linenos', )

    def create(self, validated_data):
        """
        Create and return a new `Snippet` instance, given the validated data.
        """
        return Snippet.objects.create(**validated_data)

    def update(self, instance, validated_data):
        """
        Update and return an existing `Snippet` instance, given the validated data.
        """
        instance.title = validated_data.get('title', instance.title)
        instance.linenos = validated_data.get('linenos', instance.linenos)
        instance.save()
        return instance
 
  
3、定义视图函数
 
  
 
  
from django.http import HttpResponse
from rest_framework.renderers import JSONRenderer
from rest_framework.parsers import JSONParser
from FirApp.models import Snippet
from FirApp.serializers import SnippetSerializers

class JSONResponse(HttpResponse):
    def __init__(self, data, **kwargs):
        content = JSONRenderer().render(data)
        kwargs['content_type'] = 'application/json'
        super(JSONResponse, self).__init__(content, **kwargs)

def snippet_list(request):

    if request.method == 'GET':
        snippets = Snippet.objects.all()
        serializer = SnippetSerializers(snippets, many=True)
        return JSONResponse(serializer.data)

    elif request.method == 'POST':
        data = JSONParser().parse(request)
        serializer = SnippetSerializers(data=data)
        if serializer.is_valid():
            serializer.save()
            return JSONResponse(serializer.data, status=201)
        return JSONResponse(serializer.errors, status=400)

def snippet_detail(request, pk):
    """
    Retrieve, update or delete a code snippet.
    """
    try:
        snippet = Snippet.objects.get(pk=pk)
    except Snippet.DoesNotExist:
        return HttpResponse(status=404)

    if request.method == 'GET':
        serializer = SnippetSerializers(snippet)
        return JSONResponse(serializer.data)

    elif request.method == 'PUT':
        data = JSONParser().parse(request)
        serializer = SnippetSerializers(snippet, data=data)
        if serializer.is_valid():
            serializer.save()
            return JSONResponse(serializer.data)
        return JSONResponse(serializer.errors, status=400)

    elif request.method == 'DELETE':
        snippet.delete()
        return HttpResponse(status=204)
 
  
 4、配置urls 
  
 
  
from django.conf.urls import url, include
from django.contrib import admin
from FirApp.views import UserViewSet, snippet_detail, snippet_list
#from rest_framework import routers

# router = routers.DefaultRouter()
# router.register(r'snippetlist', snippetlist)

urlpatterns = [
     url(r'^', include(router.urls)),
     url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework')),
     url(r'^snippets/$', snippet_list),
     url(r'^snippets/(?P[0-9]+)/$', snippet_detail),
 ]
 
  
 
  三、request和response 
  
 
  
from rest_framework.response import Response
from django.contrib.auth.models import User, Group
from FirApp.models import Snippet
from rest_framework.decorators import api_view
from FirApp.serializers import SnippetSerializersView

@api_view(['GET','POST'])
def snippet_api_view(request,  format=None):
    if request.method == 'GET':
        snippets = Snippet.objects.all()
        serializer = SnippetSerializersView(snippets, many=True)
        return Response(serializer.data)
    elif request.method == 'POST':
        serializer = SnippetSerializers(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=201)
        return Response(serializer.errors, status=400)
 
  
from django.conf.urls import url
from rest_framework.urlpatterns import format_suffix_patterns
from snippets import views

urlpatterns = [
    url(r'^snippets/$', views.snippet_list),
    url(r'^snippets/(?P[0-9]+)$', views.snippet_detail),
]

urlpatterns = format_suffix_patterns(urlpatterns)
 
  
http http://127.0.0.1:8000/snippets/ Accept:application/json  # Request JSON
http http://127.0.0.1:8000/snippets/ Accept:text/html         # Request HTML
http http://127.0.0.1:8000/snippets.json  # JSON suffix
http http://127.0.0.1:8000/snippets.api   # Browsable API suffix
 
  
 
  
四、APIView
 
  
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


class SnippetList(APIView):
    """
    List all snippets, or create a new snippet.
    """
    def get(self, request, format=None):
        snippets = Snippet.objects.all()
        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)
 
  
 
  
class SnippetDetail(APIView):
    """
    Retrieve, update or delete a snippet instance.
    """
    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)
 
  
 
  
from django.conf.urls import url
from rest_framework.urlpatterns import format_suffix_patterns
from snippets import views

urlpatterns = [
    url(r'^snippets/$', views.SnippetList.as_view()),
    url(r'^snippets/(?P[0-9]+)/$', views.SnippetDetail.as_view()),
]

urlpatterns = format_suffix_patterns(urlpatterns)