django 第二天
进行了前后端简单的链接
view 视图代码如下
from django.shortcuts import render from django.http import HttpResponse from django.shortcuts import redirect def s1(request): return HttpResponse('<h1>hello<h1>') def login(request): error_msg="" if request.method=="POST": user=request.POST.get('user',None) pwd=request.POST.get('pwd',None) if user=="root" and pwd=="123": return redirect("http://www.baidu.com")#实现重定向，如果网址写错的话，会自动加到链接的后面 else: error_msg="用户名或密码错误" return render(request ,'login.html',{'error_msg':error_msg}) # Create your views here.
login页面代码视图如下
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" href="/static/common.css"> </head> <body> <form action="/login/" method="post"> <p> <label for="username">用户名</label> <input id="username" name="user" type="text"> </p> <p> <label for="password">密码</label> <input id="password" name="pwd" type="text">{{error_msg}} <input type="submit" value="提交"> </p> </form> </body> </html>
账号必须是root 密码必须是123 才能够重定向 否则 就会这样
如果符合条件就会跳转到百度
注意细节
post的话，action方法必须/login/ 否则会报错 或者修改setting的文件
又新建了home页面
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <form action="/home/" method="post"> <input type="text" name="username" placeholder="用户名"> <input type="text" name="password" placeholder="密码"> <input type="text" name="sex" placeholder="性别"> <input type="submit" value="添加"> </form> <table> {% for row in userlist %} <tr> <td>{{row.username}}</td> <td>{{row.password }}</td> <td>{{row.sex}}</td> </tr> {% endfor %}<!-必须加endfor-!>这是模板语言 </table> </body> </html>
view 的视图函数如下
def home(request):
if request.method=="POST":
u=request.POST.get('username',None)
p=request.POST.get('password',None)
s=request.POST.get('sex',None)
temp={"username": u,"password": p,"sex":s}
userlist.append(temp)
return render(request,'home.html',{"userlist":userlist})#userlist传递给前端页面
内容整理
内容整理 1. 创建Django工程 django-admin startproject 工程名 2. 创建APP cd 工程名 python manage.py startapp cmdb 3、静态文件 project.settings.py STATICFILES_DIRS = ( os.path.join(BASE_DIR, "static"), ) 4、模板路径 DIRS ==> [os.path.join(BASE_DIR,'templates'),] 5、settings中 middlerware # 注释 csrf 6、定义路由规则 url.py "login" --> 函数名 7、定义视图函数 app下views.py def func(request): # request.method GET / POST # http://127.0.0.1:8009/home?nid=123&name=alex # request.GET.get('',None) # 获取请求发来的而数据 # request.POST.get('',None) # return HttpResponse("字符串") # return render(request, "HTML模板的路径") # return redirect('/只能填URL') 8、模板渲染 特殊的模板语言 -- {{ 变量名 }} def func(request): return render(request, "index.html", {'current_user': "alex"}) index.html <html> .. <body> <div>{{current_user}}</div> </body> </html> ====> 最后生成的字符串 <html> .. <body> <div>alex</div> </body> </html> -- For循环 def func(request): return render(request, "index.html", {'current_user': "alex", 'user_list': ['alex','eric']}) index.html <html> .. <body> <div>{{current_user}}</div> <ul> {% for row in user_list %} {% if row == "alex" %} <li>{{ row }}</li> {% endif %} {% endfor %} </ul> </body> </html> #####索引################# def func(request): return render(request, "index.html", { 'current_user': "alex", 'user_list': ['alex','eric'], 'user_dict': {'k1': 'v1', 'k2': 'v2'}}) index.html <html> .. <body> <div>{{current_user}}</div> <a> {{ user_list.1 }} </a> <a> {{ user_dict.k1 }} </a> <a> {{ user_dict.k2 }} </a> </body> </html> ###### 条件 def func(request): return render(request, "index.html", { 'current_user': "alex", "age": 18, 'user_list': ['alex','eric'], 'user_dict': {'k1': 'v1', 'k2': 'v2'}}) index.html <html> .. <body> <div>{{current_user}}</div> <a> {{ user_list.1 }} </a> <a> {{ user_dict.k1 }} </a> <a> {{ user_dict.k2 }} </a> {% if age %} <a>有年龄</a> {% if age > 16 %} <a>老男人</a> {% else %} <a>小鲜肉</a> {% endif %} {% else %} <a>无年龄</a> {% endif %} </body> </html>
内容整理 1. 创建Django工程 django-admin startproject 工程名 2. 创建APP cd 工程名 python manage.py startapp cmdb 3、静态文件 project.settings.py STATICFILES_DIRS = ( os.path.join(BASE_DIR, "static"), ) 4、模板路径 DIRS ==> [os.path.join(BASE_DIR,'templates'),] 5、settings中 middlerware # 注释 csrf 6、定义路由规则 url.py "login" --> 函数名 7、定义视图函数 app下views.py def func(request): # request.method GET / POST # http://127.0.0.1:8009/home?nid=123&name=alex # request.GET.get('',None) # 获取请求发来的而数据 # request.POST.get('',None) # return HttpResponse("字符串") # return render(request, "HTML模板的路径") # return redirect('/只能填URL') 8、模板渲染 特殊的模板语言 -- {{ 变量名 }} def func(request): return render(request, "index.html", {'current_user': "alex"}) index.html <html> .. <body> <div>{{current_user}}</div> </body> </html> ====> 最后生成的字符串 <html> .. <body> <div>alex</div> </body> </html> -- For循环 def func(request): return render(request, "index.html", {'current_user': "alex", 'user_list': ['alex','eric']}) index.html <html> .. <body> <div>{{current_user}}</div> <ul> {% for row in user_list %} {% if row == "alex" %} <li>{{ row }}</li> {% endif %} {% endfor %} </ul> </body> </html> #####索引################# def func(request): return render(request, "index.html", { 'current_user': "alex", 'user_list': ['alex','eric'], 'user_dict': {'k1': 'v1', 'k2': 'v2'}}) index.html <html> .. <body> <div>{{current_user}}</div> <a> {{ user_list.1 }} </a> <a> {{ user_dict.k1 }} </a> <a> {{ user_dict.k2 }} </a> </body> </html> ###### 条件 def func(request): return render(request, "index.html", { 'current_user': "alex", "age": 18, 'user_list': ['alex','eric'], 'user_dict': {'k1': 'v1', 'k2': 'v2'}}) index.html <html> .. <body> <div>{{current_user}}</div> <a> {{ user_list.1 }} </a> <a> {{ user_dict.k1 }} </a> <a> {{ user_dict.k2 }} </a> {% if age %} <a>有年龄</a> {% if age > 16 %} <a>老男人</a> {% else %} <a>小鲜肉</a> {% endif %} {% else %} <a>无年龄</a> {% endif %} </body> </html>
