django-rest-framework 使用例子

Start Your API

创建项目

startproject rest_api

创建APP

startapp task

配置 rest_api/settings.py

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'task',

)

配置 rest_api/urls.py

# -*- coding:utf-8 -*-
from django.conf.urls import url, include

urlpatterns = [
    url(r'^api/', include('task.urls')),
]

创建模型 task/models.py

# -*- coding:utf-8 -*-
from django.db import models

class Task(models.Model):
    title = models.CharField('标题', max_length=100)
    description = models.TextField('描述')
    completed = models.BooleanField('是否完成', default=False)
    create_date = models.DateTimeField('创建时间', auto_now_add=True)

    def __unicode__(self):
        return self.title

序列化 task/serializers.py

# -*- coding:utf-8 -*-
from rest_framework import serializers
from .models import Task

class TaskSerializer(serializers.ModelSerializer):
    class Meta:
        model = Task
        fields = ('id', 'title', 'description', 'completed', 'create_date')

视图 task/views.py

# -*- coding:utf-8 -*-
from rest_framework.decorators import api_view
from rest_framework import status
from rest_framework.response import Response
from rest_framework.views import APIView
from rest_framework import generics

from .models import Task
from .serializers import TaskSerializer

# 第一种方式：APIView
class TaskList(APIView):
    def get(self, request, format=None):
        tasks = Task.objects.all()
        serializer = TaskSerializer(tasks, many=True)
        return Response(serializer.data)

    def post(self, request, format=None):
        serializer = TaskSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

# 第二种方式：通用视图 ListCreateAPIView
class TaskListCreate(generics.ListCreateAPIView):
    queryset = Task.objects.all()
    serializer_class = TaskSerializer

# 第三种方式：装饰器 api_view
@api_view(['GET', 'POST'])
def task_list(request):
    '''
    List all tasks, or create a new task.
    '''
    if request.method == 'GET':
        tasks = Task.objects.all()
        serializer = TaskSerializer(tasks, many=True)
        return Response(serializer.data)
    elif request.method == 'POST':
        serializer = TaskSerializer(data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data, status=status.HTTP_201_CREATED)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

@api_view(['GET', 'PUT', 'DELETE'])
def task_detail(request, pk):
    try:
        task = Task.objects.get(pk=pk)
    except Task.DoesNotExist:
        return Response(status=status.HTTP_404_NOT_FOUND)

    if request.method == 'GET':
        serializer = TaskSerializer(task)
        return Response(serializer.data)
    elif request.method == 'PUT':
        serializer = TaskSerializer(task, data=request.data)
        if serializer.is_valid():
            serializer.save()
            return Response(serializer.data)
        else:
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
    elif request.method == 'DELETE':
        task.delete()
        return Response(status=status.HTTP_204_NO_CONTENT)

路由 task/urls.py

# -*- coding:utf-8 -*-
from django.conf.urls import  url
from . import views

urlpatterns = [
    url(r'^tasks/$', views.task_list, name='task_list'),
    # url(r'^tasks/$', views.TaskList.as_view(), name='task_list'),
    # url(r'^tasks/$', views.TaskListCreate.as_view(), name='task_list'),
    url(r'^tasks/(?P<pk>[0-9]+)$', views.task_detail, name='task_detail'),
]

Command Line

curl http://localhost:8000/api/tasks/
curl -X POST http://localhost:8000/api/tasks/ -d "title=hello world&description=a whole new world"
curl -X PUT http://localhost:8000/api/tasks/1 -d "title=hello world&description=be nice"
curl -X DELETE http://localhost:8000/api/tasks/1

---

Permissions & Authentication

创建项目

startproject rest_api

创建 APP

startapp task

配置 rest_api/settings.py

INSTALLED_APPS = (
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'rest_framework',
    'task',

)

配置 rest_api/urls.py

# -*- coding:utf-8 -*-
from django.conf.urls import url, include

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

]

创建模型 task/models.py

# -*- coding:utf-8 -*-
from django.db import models

class Task(models.Model):
    owner = models.ForeignKey('auth.User', related_name='tasks')
    title = models.CharField('标题', max_length=100)
    description = models.TextField('描述')
    completed = models.BooleanField('是否完成', default=False)
    create_date = models.DateTimeField('创建时间', auto_now_add=True)

    def __unicode__(self):
        return self.title

序列化 task/serializers.py

# -*- coding:utf-8 -*-
from rest_framework import serializers
from .models import Task

class TaskSerializer(serializers.ModelSerializer):
    owner = serializers.ReadOnlyField(source='owner.username')
    class Meta:
        model = Task
        fields = ('id', 'title', 'description', 'completed', 'owner')

创建 task/permissions.py

# -*- coding:utf-8 -*-
from rest_framework.permissions import IsAuthenticatedOrReadOnly, SAFE_METHODS

class IsOwnerOrReadOnly(IsAuthenticatedOrReadOnly):
    def has_object_permission(self, request, view, obj):
        if request.method in SAFE_METHODS:
            return True
        return obj.owner == request.user

视图 task/views.py

# -*- coding:utf-8 -*-
from rest_framework.generics import ListCreateAPIView, RetrieveUpdateDestroyAPIView

from .models import Task
from .serializers import TaskSerializer
from .permissions import IsOwnerOrReadOnly

class TaskMixin(object):
    queryset = Task.objects.all()
    serializer_class = TaskSerializer
    permission_classes = (IsOwnerOrReadOnly,)

class TaskList(TaskMixin, ListCreateAPIView):
    def perform_create(self, serializer):
        serializer.save(owner=self.request.user)

class TaskDetail(TaskMixin, RetrieveUpdateDestroyAPIView):
    pass

路由 task/urls.py

# -*- coding:utf-8 -*-
from django.conf.urls import  url
from . import views

urlpatterns = [
    url(r'^tasks/$', views.TaskList.as_view(), name='task_list'),
    url(r'^tasks/(?P<pk>[0-9]+)$', views.TaskDetail.as_view(), name='task_detail'),

]

Command Line

curl http://localhost:8000/api/tasks/
curl -X POST http://localhost:8000/api/tasks/ -d "title=basic&description=BasicAuthentication" -u admin:password
curl -X PUT http://localhost:8000/api/tasks/1 -d "title=basic&description=BasicAuthentication&completed=True" -u admin:password
curl -X DELETE http://localhost:8000/api/tasks/1 -u admin:password

curl -X POST http://localhost:8000/api/tasks/ -H "X-CSRFToken: token" --cookie "sessionid=session; csrftoken=token" -d "title=session&description=SessionAuthentication"
# X-CSRFToken in headers just need be the same with csrftoken in cookie.

上面是两种默认的认证方式（SessionAuthentication 和 BasicAuthentication），还有 TokenAuthentication。

通过以上，未授权认证的用户只能查看，只有授权认证的用户才可以进行创建，删除，更新操作。