从0学DRF（实战和源码剖析）——版本

使用方法

版本一般的两种形式

• a. URL中通过GET传参()
  自定义：
  http://127.0.0.1:8000/api/users/?version=v2

class ParamVersion(object):
	def determine_version(self, request, *args, **kwargs):
		version = request.query_params.get('version')
		return version

class UsersView(APIView):

	versioning_class = ParamVersion
	def get(self,request,*args,**kwargs):
		#version = request._request.GET.get('version')
		#print(version)
		# version = request.query_params.get('version')
		# print(version)

		print(request.version)

		return HttpResponse('用户列表')

• b. 在URL中传参（推荐使用）

urlpatterns = [
	# url(r'^admin/', admin.site.urls),
	url(r'^(?P[v1|v2]+)/users/$', views.UsersView.as_view()),
]

版本只需要在配置文件中配置

REST_FRAMEWORK = {
	"DEFAULT_VERSIONING_CLASS":"rest_framework.versioning.URLPathVersioning",
	"DEFAULT_VERSION":'v1',
	"ALLOWED_VERSIONS":['v1','v2'],
	"VERSION_PARAM":'version',
}
		

class UsersView(APIView):

	def get(self,request,*args,**kwargs):
		print(request.version)
		return HttpResponse('用户列表')

总结

使用：
配置文件：

REST_FRAMEWORK = {
	"DEFAULT_VERSIONING_CLASS":"rest_framework.versioning.URLPathVersioning",
	"DEFAULT_VERSION":'v1',
	"ALLOWED_VERSIONS":['v1','v2'],
	"VERSION_PARAM":'version',
}

路由系统：

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

	urlpatterns = [
		# url(r'^admin/', admin.site.urls),
		url(r'^(?P[v1|v2]+)/users/$', views.UsersView.as_view(),name='uuu'),
	]
			

视图：

class UsersView(APIView):

	def get(self,request,*args,**kwargs):

		# 1. 获取版本
		print(request.version)
		
		# 2. 获取处理版本的对象
		print(request.versioning_scheme)

		# 3. 反向生成URL（rest framework）
		u1 = request.versioning_scheme.reverse(viewname='uuu',request=request)
		print(u1)

		# 4. 反向生成URL
		u2 = reverse(viewname='uuu',kwargs={'version':2})
		print(u2)

		return HttpResponse('用户列表')