《千锋Django培训》网课笔记（从9到11）

最新推荐文章于 2020-07-17 23:19:28 发布

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本文详细介绍了Django项目的基本结构，包括项目与应用的urls配置、视图处理流程及模型数据交互过程。通过具体示例展示了请求如何从服务器传递到视图函数并返回响应。

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九.

十.

当一个请求到达服务器时，服务器先去project下的urls.py，再被里面的内容导向myApp下的urls.py, 再被这里面的内容，导向myApp下的views.py

十一.

当前项目的树形结构

[root@VM_0_15_centos project]# tree
.
|-- db.sqlite3
|-- manage.py
|-- myApp
|   |-- admin.py
|   |-- apps.py
|   |-- __init__.py
|   |-- migrations
|   |   |-- 0001_initial.py
|   |   |-- __init__.py
|   |   `-- __pycache__
|   |       |-- 0001_initial.cpython-36.pyc
|   |       `-- __init__.cpython-36.pyc
|   |-- models.py
|   |-- __pycache__
|   |   |-- admin.cpython-36.pyc
|   |   |-- __init__.cpython-36.pyc
|   |   |-- models.cpython-36.pyc
|   |   |-- urls.cpython-36.pyc
|   |   `-- views.cpython-36.pyc
|   |-- tests.py
|   |-- urls.py
|   `-- views.py
|-- project
|   |-- __init__.py
|   |-- __pycache__
|   |   |-- __init__.cpython-36.pyc
|   |   |-- settings.cpython-36.pyc
|   |   |-- urls.cpython-36.pyc
|   |   `-- wsgi.cpython-36.pyc
|   |-- settings.py
|   |-- urls.py
|   `-- wsgi.py
`-- templates

第一个文件：/home/virtualenvs/01-sunck/project/myApp/views.py

# Create your views here.
from django.shortcuts import render
from django.http import HttpResponse

def index(request):
    return HttpResponse('This is the main page.')
def detail(request,num):
    return HttpResponse('detail-%s'%num)

from .models import Grades
def grades(request):
    #get data from models
    gradesList = Grades.objects.all()
    #send data to templates, templates render them and send them to the browser.
    return render(request, 'myApp/grades.html',{"grades":gradesList})

from .models import Students
def students(request):
    #get data from models
    studentsList = Students.objects.all()
    #send data to templates, templates render them and send them to the browser.
    return render(request, 'myApp/students.html',{"students":studentsList})

第二个文件：/home/virtualenvs/01-sunck/project/myApp/urls.py

from django.urls import path
from . import views

urlpatterns = [
    path('',views.index),
    path('<int:num>',views.detail),
    path('grades/',views.grades),
    path('students/',views.students),
]

第三个文件：/home/virtualenvs/01-sunck/project/project/urls.py

from django.contrib import admin
from django.urls import path,include

urlpatterns = [
    path('admin/', admin.site.urls),
    path('',include('myApp.urls')),
]