$mkdir ~/env

$virtualenv ~/env/tutorial

$source ~/env/tutorial/bin/avtivate

$pip install django

$pip install djangorestframework

$pip install pygments  ////使用这个包，做代码高亮显示

$ cd ~

$ django-admin.py startproject tutorial

$ cd tutorial

$python manage.py startapp snippets

DATABASES = {
  'default': {
    'ENGINE': 'django.db.backends.sqlite3',
    'NAME': 'tmp.db',
    'USER': '',
    'PASSWORD': '',
    'HOST': '',
    'PORT': '',
  }
}

INSTALLED_APPS = (
  ...
  'rest_framework',
  'snippets',
)

urlpatterns = patterns('',
  url(r'^', include('snippets.urls')),
)

from django.db import models
from pygments.lexers import get_all_lexers
from pygments.styles import get_all_styles

LEXERS = [item for item in get_all_lexers() if item[1]]
LANGUAGE_CHOICES = sorted([(item[1][0], item[0]) for item in LEXERS])
STYLE_CHOICES = sorted((item, item) for item in get_all_styles())

class Snippet(models.Model):
  created = models.DateTimeField(auto_now_add=True)
  title = models.CharField(max_length=100, default='')
  code = models.TextField()
  linenos = models.BooleanField(default=False)
  language = models.CharField(choices=LANGUAGE_CHOICES,
                default='python',
                max_length=100)
  style = models.CharField(choices=STYLE_CHOICES,
               default='friendly',
               max_length=100)

  class Meta:
    ordering = ('created',)

python manage.py syncdb

from django.forms import widgets
from rest_framework import serializers
from snippets.models import Snippet

class SnippetSerializer(serializers.Serializer):
  pk = serializers.Field() # Note: `Field` is an untyped read-only field.
  title = serializers.CharField(required=False,
                 max_length=100)
  code = serializers.CharField(widget=widgets.Textarea,
                 max_length=100000)
  linenos = serializers.BooleanField(required=False)
  language = serializers.ChoiceField(choices=models.LANGUAGE_CHOICES,
                    default='python')
  style = serializers.ChoiceField(choices=models.STYLE_CHOICES,
                  default='friendly')

  def restore_object(self, attrs, instance=None):
    """
    Create or update a new snippet instance.
    """
    if instance:
      # Update existing instance
      instance.title = attrs['title']
      instance.code = attrs['code']
      instance.linenos = attrs['linenos']
      instance.language = attrs['language']
      instance.style = attrs['style']
      return instance

    # Create new instance
    return Snippet(**attrs)

 $python manage.py shell

from snippets.models import Snippet
from snippets.serializers import SnippetSerializer
from rest_framework.renderers import JSONRenderer
from rest_framework.parsers import JSONParser

snippet = Snippet(code='print "hello, world"\n')
snippet.save()

serializer = SnippetSerializer(snippet)
serializer.data
# {'pk': 1, 'title': u'', 'code': u'print "hello, world"\n', 'linenos': False, 'language': u'python', 'style': u'friendly'}

content = JSONRenderer().render(serializer.data)
content
# '{"pk": 1, "title": "", "code": "print \\"hello, world\\"\\n", "linenos": false, "language": "python", "style": "friendly"}'

import StringIO

stream = StringIO.StringIO(content)
data = JSONParser().parse(stream)

serializer = SnippetSerializer(data=data)
serializer.is_valid()
# True
serializer.object
# <Snippet: Snippet object>

class SnippetSerializer(serializers.ModelSerializer):
  class Meta:
    model = Snippet
    fields = ('id', 'title', 'code', 'linenos', 'language', 'style')

from django.http import HttpResponse
from django.views.decorators.csrf import csrf_exempt
from rest_framework.renderers import JSONRenderer
from rest_framework.parsers import JSONParser
from snippets.models import Snippet
from snippets.serializers import SnippetSerializer

class JSONResponse(HttpResponse):
  """
  An HttpResponse that renders it's content into JSON.
  """
  def __init__(self, data, **kwargs):
    content = JSONRenderer().render(data)
    kwargs['content_type'] = 'application/json'
    super(JSONResponse, self).__init__(content, **kwargs)

@csrf_exempt
def snippet_list(request):
  """
  List all code snippets, or create a new snippet.
  """
  if request.method == 'GET':
    snippets = Snippet.objects.all()
    serializer = SnippetSerializer(snippets)
    return JSONResponse(serializer.data)

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

@csrf_exempt
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 = SnippetSerializer(snippet)
    return JSONResponse(serializer.data)

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

  elif request.method == 'DELETE':
    snippet.delete()
    return HttpResponse(status=204)

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

 >>quit()

 python manage.py runserver

Validating models...

0 errors found
Django version 1.4.3, using settings 'tutorial.settings'
Development server is running at http://127.0.0.1:8000/
Quit the server with CONTROL-C.

url http://127.0.0.1:8000/snippets/

[{"id": 1, "title": "", "code": "print \"hello, world\"\n", "linenos": false, "language": "python", "style": "friendly"}]
 url http://127.0.0.1:8000/snippets/1/

{"id": 1, "title": "", "code": "print \"hello, world\"\n", "linenos": false, "language": "python", "style": "friendly"}

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):
  """
  List all snippets, or create a new snippet.
  """
  if request.method == 'GET':
    snippets = Snippet.objects.all()
    serializer = SnippetSerializer(snippets)
    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)
    else:
      return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

@api_view(['GET', 'PUT', 'DELETE'])
def snippet_detail(request, pk):
  """
  Retrieve, update or delete a snippet instance.
  """       
  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)
    else:
      return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)

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

def snippet_list(request, format=None):
and

def snippet_detail(request, pk, format=None):

from django.conf.urls import patterns, url
from rest_framework.urlpatterns import format_suffix_patterns

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

urlpatterns = format_suffix_patterns(urlpatterns)