Python Learning day 71st: Django2 and 1 differences and views

Django1 vs. 2 routing differences

In Django1The URL inIn Django2In the Re_pathdjango2The path is added to the1.From Django.urlsImport path2.Regular, exact match is not supported3.Yes5a converter (intStr, Slug, PathUuid）4.Custom Converters:1Write a class:ClassTest:regex =' [0-9]{4} 'def to_python (self, value): #  write a bunch of processing value=value+ ' AAA ' return valuedef to_urlreturn  '%04d '% value2 from django.urls Span class= "Hljs-keyword" >import register_converter3 register_converter  (Test, "TTT" 4 Path ( ' index/<ttt:year> ', Views.index,name= ' index '),  

MVC and MTV

    M          T                 Vmodels   template         viewsM          V                 C(路由+views)models    模板              控制器其实MVC与MTV是一样的，django中为MTV,数据交互层，视图层以及控制层

View Layer: Request Object

RequestObject:#Formform, do not write method, the default is getRequest#1What is the case with get: Request data, request page,#2With PostRequest: Submit data to the server#Request. GETDictionary# request. POST  dictionary #  type of request # print (request.method) #< span class= "bash" >  path # http://127.0.0.1:8000/ Index/ppp/dddd/?name=lqz#  protocol: IP  address and port/ path? Parameters ( data) # print ( Request.path)-->/index/ppp/dddd/#  Print (Request.get_full_path ())-->/index/ppp/dddd/?name=lqz         

Three-piece set

renderHttpResponseredirect

Jsonresponse sending a JSON format string to the front-end page

封装了jsonfrom django.http import JsonResponsedic={‘name‘:‘lqz‘,‘age‘:18}li=[1,2,3,4]return JsonResponse(li,safe=False)

CBV and FBV

CBV（ClassBaseView) andFBV (functionBaseViewCbv:from django.views Import ViewClassTest (View):DefDispatch(Self, request, *args, **kwargs):#Distribute# can add logical judgment statement obj=Super (). Dispatch (Request, *args, **kwargs)# can add logical judgment statement return objdef get (self,request): obj= render (Request,' index.html ') print (type (obj))return objdef Post (self,request):return HttpResponse (' OK ') in the URLs: Re_path (R' index/', views. Test.as_view ()),                

Simple File Upload

HtmlMedium: <form action="" Method="POST" enctype="Multipart/form-data" >User name: <inputType="Text" Name="Name" >Password: <inputType="Text" Name="Password" >Files: <inputType="File" Name="MyFile" ><inputType="Submit" ></form>viewsInClassCBV (View):def dispatch (self, request, *args, **kwargs): obj = super (). Dispatch (Request, *args, **kwargs) return obj def get (self,request): return render (Request, ' index.html ') def post (self,request): AAA = Request. files.get ( ' myfile ') with open ( Aaa.name,for line in Aaa.chunks (): F.write (line) Span class= "Hljs-keyword" >return httpresponse ( ' OK ')   

Python Learning day 71st: Django2 and 1 differences and views