Python采用Django制作简易的知乎日报API

set character_set_client=utf8 ;
set character_set_connection=utf8 ;
set character_set_database=utf8 ;
set character_set_results=utf8 ;
set character_set_server=utf8 ;
set character_set_system=utf8 ;

class News(models.Model):
  created = models.DateTimeField(auto_now_add=True)
  title = models.CharField(max_length=100)
  image = models.CharField(max_length=100)
  theme_id =models.IntegerField()
  class Meta:
    ordering = ('created',)
  def __unicode__(self):
    return self.title

class NewsDetail(models.Model):
  news = models.ForeignKey(News)
  created = models.DateTimeField(auto_now_add=True)
  content = models.CharField(max_length=1000)
  image = models.CharField(max_length=99)
  class Meta:
    ordering = ('created',)
  def __unicode__(self):
    return self.news.title

from rest_framework import serializers
class NewsSerializer(serializers.ModelSerializer):
  class Meta:
    model = News
    fields = ('id', 'title', 'image', 'theme_id')

class NewsDetailSerializer(serializers.ModelSerializer):
  class Meta:
    model = NewsDetail
    fields = ('id', 'image', 'content')

from rest_framework.renderers import JSONRenderer
class JSONResponse(HttpResponse):
  """
  用于返回JSON数据.
  """

  def __init__(self, data, **kwargs):
    content = JSONRenderer().render(data)
    kwargs['content_type'] = 'application/json'
    content='{"news":'+content+'}'
    super(JSONResponse, self).__init__(content, **kwargs)

@csrf_exempt
def latest_news(request):
  """
  展示最新的10个news.
  """
  if request.method == 'GET':
    news = News.objects.all()[:10]
    serializer = NewsSerializer(news, many=True)
    return JSONResponse(serializer.data)

@csrf_exempt
def theme_news(request,theme_id):
  """
  展示某个主题的前10个news.
  """
  if request.method == 'GET':
    news=News.objects.filter(theme_id=theme_id)[:10]
    serializer = NewsSerializer(news, many=True)
    return JSONResponse(serializer.data)

@csrf_exempt
def news_detail(request,news_id):
  """
  显示某个news的内容.
  """
  try:
    news = NewsDetail.objects.get(news_id=news_id)
  except Snippet.DoesNotExist:
    return HttpResponse(status=404)

  if request.method == 'GET':
    serializer = NewsDetailSerializer(news)
    # print serializer.data
    return JSONResponse(serializer.data)

urlpatterns = [
  ...
  url(r'^api/4/news/latest$', latest_news),
  url(r'^api/4/news/theme/(?P<theme_id>[0-9]+)/$', theme_news),
  url(r'^api/4/news/(?P<news_id>[0-9]+)/$', news_detail),
]