从cbv到fbv：用函数写视图与用类写视图的区别（drf与restful）

FBV 基于函数的视图 （function base views）

CBV 基于类的视图 （class base views）

也就是说我们是用函数编写视图_{还是类编写视图我们来看下两个的简单实现}~

urlpatterns = [
path(‘admin/‘, admin.site.urls),
path(‘test_fbv‘, test_fbv), #FBV
path(‘test_cbv‘, TestCBV.as_view()) #CBV
]
def test_fbv(request): ##函数式视图
return HttpResponse("ok")

class TestCBV(View): ##类式视图
def get(self, request):
return HttpResponse("ok")
CBV会执行as_view()方法，

a. 接口开发

urlpatterns = [
# url(r'^admin/', admin.site.urls),
url(r'^get_order/', views.get_order),
url(r'^add_order/', views.add_order),
url(r'^del_order/', views.del_order),
url(r'^update_order/', views.update_order),
]

def get_order(request):
return HttpResponse('')

def add_order(request):
return HttpResponse('')

def del_order(request):
return HttpResponse('')

def update_order(request):
return HttpResponse('')

b. restful 规范（建议）

1. 根据method不同做不同的操作，示例：

基于FBV:
urlpatterns = [
url(r'^order/', views.order),
]

def order(request):
if request.method == 'GET':
return HttpResponse('获取订单')
elif request.method == 'POST':
return HttpResponse('创建订单')
elif request.method == 'PUT':
return HttpResponse('更新订单')
elif request.method == 'DELETE':
return HttpResponse('删除订单')
基于CBV:
urlpatterns = [
url(r'^order/', views.OrderView.as_view()),
]

class OrderView(View):
def get(self,request,*args,**kwargs):
return HttpResponse('获取订单')

def post(self,request,*args,**kwargs):
return HttpResponse('创建订单')

def put(self,request,*args,**kwargs):
return HttpResponse('更新订单')

def delete(self,request,*args,**kwargs):
return HttpResponse('删除订单')