Django学习日记-02简单的模板渲染

Django 框架大致分成3个部分 

　　a-socket服务端

　　b-根据请求信息提取url路由系统

　　c-模板渲染 （hrml+css+js）+函数

c 的创建过程

　　一-首先配置settings.py 

                               1,STATICFLES_DIRS( os.path.join(BASE_DIR, "/static/"))　　

　　　　　　　　　2,创建templates模板路径 

　　　　　　　　　　　　'DIRS': [os.path.join(BASE_DIR, 'templates')]

　　　　　　　　　3，注释Csrf

　　　　　　　　　　 # 'django.middleware.csrf.CsrfViewMiddleware',

      二  -创建HTML模板样式

   　三-在url.py中写出想要的url

　　　　注意不要漏掉 ”/“ 和结尾的 ，

　　　例如：　

urlpatterns = [
    path('admin/', admin.site.urls),
    path('teacher/', item.teacher),
    path('add_teacher/', item.add_teacher),
    path('del_teacher/', item.del_teacher),
    path('edit_teacher/', item.edit_teacher),
]

　　 　四- 根据URL写出对于的函数

　　 　　 　　　　需要数据时要建立pymysql  步骤是固定的  增删改 用 conn.commit    查 用 cursor.fetchall / fetchone

　　　　　　　　　　

import pymysqlxu
from django.shortcuts import render, redirect

def teacher(request):
    conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='123456', database='day6')
    cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
    cursor.execute("select id,name from teacher ")
    result = cursor.fetchall()
    cursor.close()
    conn.close()
    return render(request, 'teacher.html', {'result': result})

def add_teacher(request):l
    if request.method == 'GET':
        return render(request, 'add_teacher.html')
    if request.method == 'POST':
        name = request.POST.get('name')
        conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='123456', database='day6')
        cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cursor.execute("insert into teacher(name) values (%s)", [name, ])
        conn.commit()
        cursor.close()
        conn.close()
        return redirect('/teacher/')

def del_teacher(request):
    id = request.GET.get('id')
    conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='123456', database='day6')
    cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
    cursor.execute("delete from teacher where id=%s", [id, ])
    conn.commit()
    cursor.close()
    conn.close()
    return redirect('/teacher/')

def edit_teacher(request):
    if request.method == 'GET':
        id = request.GET.get('id')
        conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='123456', database='day6')
        cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cursor.execute("select id,name from teacher where id=%s", [id, ])
        result = cursor.fetchone()
        cursor.close()
        conn.close()
        return render(request, 'edit_teacher.html', {'result':result})
    if request.method == 'POST':
        id = request.GET.get('id')
        name = request.POST.get('name')
        conn = pymysql.connect(host='127.0.0.1', port=3306, user='root', password='123456', database='day6')
        cursor = conn.cursor(cursor=pymysql.cursors.DictCursor)
        cursor.execute("update teacher set name=%s where id=%s", [name,id, ])
        conn.commit()
        cursor.close()
        conn.close()
        return redirect('/teacher/')

 总结 ：多练习就完事了