3.1 Create more Views

first_django_app.md

@@ -172,4 +172,15 @@ Here `path()` function is passed **route** and **view**; two additional option a
 
 ### Test API
 
-进入 `python manage.py shell` 可以使用Django创建的各种API，如[数据库抽象API database API(建议细看)](https://docs.djangoproject.com/zh-hans/3.1/topics/db/queries/)
+进入 `python manage.py shell` 可以使用Django创建的各种API，如[数据库抽象API database API(建议细看)](https://docs.djangoproject.com/zh-hans/3.1/topics/db/queries/)
+
+## Part 3
+
+* In Django, web content & HTML come from Views models. Every view is a Python function/class. Django use customer requested URL to decide which View to generate.
+* Django use 'URLconfs' to map btw URL and Views. Details of[pURL manager](https://docs.djangoproject.com/zh-hans/3.1/topics/http/urls/)
+* URL's general form: `/newsarchive/<year>/<month>/`
+
+### Create more Views
+
+> 当某人请求你网站的某一页面时——比如说， "/polls/34/" ，Django 将会载入 mysite.urls 模块，因为这在配置项 ROOT_URLCONF 中设置了。然后 Django 寻找名为 urlpatterns 变量并且按序匹配正则表达式。在找到匹配项 'polls/'，它切掉了匹配的文本（"polls/"），将剩余文本——"34/"，发送至 'polls.urls' URLconf 做进一步处理。在这里剩余文本匹配了 "<int:question_id>/"，使得我们 Django 以如下形式调用 polls.urls.detail():
+> `detail(request=<HttpRequest object>, question_id=34)`

src/polls/urls.py

@@ -3,5 +3,12 @@ from django.urls import path
 from . import views
 
 urlpatterns = [
+    # ex: /polls/
     path('', views.index, name='index'),
+    # ex: /polls/5/
+    path('<int:question_id>/', views.detail, name='detail'),
+    # ex: /polls/5/results/
+    path('<int:question_id>/results/', views.results, name='results'),
+    # ex: /polls/5/vote/
+    path('<int:question_id>/vote/', views.vote, name='vote'),
 ]

src/polls/views.py

@@ -2,4 +2,14 @@ from django.http import request, HttpResponse
 from django.shortcuts import render
 
 def index(request):
-    return HttpResponse("Hello, world. You're at the polls index")
+    return HttpResponse("Hello, world. You're at the polls index")
+
+def detail(request, question_id):
+    return HttpResponse("You're looking at question %s." % question_id)
+
+def results(request, question_id):
+    response = "You're looking at the results of question %s."
+    return HttpResponse(response % question_id)
+
+def vote(request, question_id):
+    return HttpResponse("You're voting on question %s." % question_id)