rest_framework使用完之后的简单总结

首先先大致概括一下使用流程，因为还不是对这个框架很熟悉（其实有很多知识可以对比formModel的）

其实还是遵循django的MTV的模式，还是得从url开始

1、rest_framework有一个路由的写法，向下面这样

router = DefaultRouter()

router.register(r'procurements',view.ProcurementViewSet)

urlpatterns = [

　　url(r'^',include(router.urls)),

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

　　url(r'my_P/$',views.My_P_M_ProductList.as_views()),

　　url(r'list/$',views.product_list_frame,name='product_list_frame'),

]^

2、视图通常使用的是viewset类，然后在类名下面定义序列化，以及权限，或者过滤器，其中要使整个框架跑起来，一定要使用序列化，这个是必须的

然后使用其他的功能的话，就在序列化的下面定义相应的功能，有些函数是默认的，只需要重写，在需要使用的位置会被自动调用

类似于这段函数

class ProcurementViewSet(viewsets.ModelViewSet):
   queryset = Procurement.objects.all()
   serializer_class = ProcurementSerializer
   def get_queryset(self):
      sum_procurement = Procurement.objects.all()
      quoted_procurements_list = Procurement.objects.annotate(quote_count=Count('quote')).filter(quote_count__gt=0)
      has_closed = Procurement.objects.filter(ptype=2)
      has_not_quote = list(set(sum_procurement).difference(quoted_procurements_list))
      has_not_quote = list(set(has_not_quote).difference(has_closed))
      # return sum_procurement
      return {'sum_procurement':sum_procurement,'quoted_procurements_list':quoted_procurements_list,'has_closed':has_closed,'has_not_quote':has_not_quote}
   def list(self, request, *args, **kwargs):
      baseQueryset = self.get_queryset()["sum_procurement"]
      if request.query_params.has_key('request_page') and request.query_params.has_key('max_line'):
         request_page = int(request.query_params['request_page'])
         max_line = int(request.query_params['max_line'])
         max_page = baseQueryset.count() / max_line
         if baseQueryset.count() % max_line > 0:
            max_page += 1
         if request_page <= max_page:
            start = max_line * (request_page - 1)
            end = start + max_line
            baseQueryset = baseQueryset[start:end]
      quotedproset = self.get_queryset()["quoted_procurements_list"]
      closeproset = self.get_queryset()["has_closed"]
      notquotedproset = self.get_queryset()["has_not_quote"]
      serializer = ProcurementSerializer(baseQueryset, many=True)
      serializerquoted = ProcurementSerializer(quotedproset,many=True)
      serializerclosed = ProcurementSerializer(closeproset,many=True)
      serializernotquoted = ProcurementSerializer(notquotedproset,many=True)
      if request.query_params.has_key('request_page') and request.query_params.has_key('max_line'):
         return Response({'serializerdata': serializer.data, 'max_page': max_page})
      elif request.query_params.has_key('quoted'):
         return Response({'serializerquoted':serializerquoted})
      elif request.query_params.has_key("closed"):
         return Response({'serializerclosed':serializerclosed})
      elif request.query_params.has_key('notquoted'):
         return Response({'serializernotquoted':serializernotquoted})
3、序列化的定义类似于下面的代码

class ProcurementSerializer(serializers.ModelSerializer):
   class Meta:
         model = Procurement
权限的定义类似于下面的代码

class IsOwnerOrReadOnly( permissions.BasePermission):
   
   def has_object_permission(self, request, view, obj):
      if request.method in permissions.SAFE_METHODS: #GET/HEAD/OPTIONS
         return True
      return obj.from_whom.member == request.user
      
总结起来的意思就是url，视图（好几种不同的写法），还有序列化取数据，是功能基本使用的最基本的用法，其他的只要相应的在上面加就可以了
部分功能参考链接：http://www.hi-roy.com//2016/06/27/django-REST-framework%E4%B8%AD%E6%96%87%E6%96%87%E6%A1%A3%E6%95%99%E7%A8%8B/