Django用户名密码错误提示

 1 from django.shortcuts import render
 2 # Create your views here.
 3 
 4 from django.shortcuts import render
 5 from django.shortcuts import redirect  #重新定向模块
 6 
 7 def login(request):
 8      #包含用户提交的所有信息
 9      #获取用户提交方法
10     #print(request.method)
11     error_msg = ""
12     if request.method == "POST":
13         #获取用户通过POST提交过来的数据
14         user =request.POST.get('user',None)
15         pwd =request.POST.get('pwd',None)
16         if user == 'root' and pwd == '123':
17             #去跳转到
18             return  redirect('http://www.baidu.com')
19         else:
20             #用户密码不匹配
21             error_msg = '用户名或密码错误'
22         # user = request.POST['user']
23         # pwd = request.POST['pwd']
24         # print(user,pwd)
25     return render(request,'login.html',{'error_msg':error_msg})

views.py

  1 """
  2 Django settings for S14Djngo project.
  3 
  4 Generated by 'django-admin startproject' using Django 1.11.6.
  5 
  6 For more information on this file, see
  7 https://docs.djangoproject.com/en/1.11/topics/settings/
  8 
  9 For the full list of settings and their values, see
 10 https://docs.djangoproject.com/en/1.11/ref/settings/
 11 """
 12 
 13 import os
 14 
 15 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 16 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 17 
 18 
 19 # Quick-start development settings - unsuitable for production
 20 # See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/
 21 
 22 # SECURITY WARNING: keep the secret key used in production secret!
 23 SECRET_KEY = '^mh@&$v_x+3@+rz$ho$l^t^=tx-=b1a3ylc#nrnuh&mayil-4*'
 24 
 25 # SECURITY WARNING: don't run with debug turned on in production!
 26 DEBUG = True
 27 
 28 ALLOWED_HOSTS = []
 29 
 30 
 31 # Application definition
 32 
 33 INSTALLED_APPS = [
 34     'django.contrib.admin',
 35     'django.contrib.auth',
 36     'django.contrib.contenttypes',
 37     'django.contrib.sessions',
 38     'django.contrib.messages',
 39     'django.contrib.staticfiles',
 40 ]
 41 
 42 MIDDLEWARE = [
 43     'django.middleware.security.SecurityMiddleware',
 44     'django.contrib.sessions.middleware.SessionMiddleware',
 45     'django.middleware.common.CommonMiddleware',
 46     #'django.middleware.csrf.CsrfViewMiddleware',
 47     'django.contrib.auth.middleware.AuthenticationMiddleware',
 48     'django.contrib.messages.middleware.MessageMiddleware',
 49     'django.middleware.clickjacking.XFrameOptionsMiddleware',
 50 ]
 51 
 52 ROOT_URLCONF = 'S14Djngo.urls'
 53 
 54 TEMPLATES = [
 55     {
 56         'BACKEND': 'django.template.backends.django.DjangoTemplates',
 57         'DIRS': [os.path.join(BASE_DIR, 'templates')],
 58         'APP_DIRS': True,
 59         'OPTIONS': {
 60             'context_processors': [
 61                 'django.template.context_processors.debug',
 62                 'django.template.context_processors.request',
 63                 'django.contrib.auth.context_processors.auth',
 64                 'django.contrib.messages.context_processors.messages',
 65             ],
 66         },
 67     },
 68 ]
 69 
 70 WSGI_APPLICATION = 'S14Djngo.wsgi.application'
 71 
 72 
 73 # Database
 74 # https://docs.djangoproject.com/en/1.11/ref/settings/#databases
 75 
 76 DATABASES = {
 77     'default': {
 78         'ENGINE': 'django.db.backends.sqlite3',
 79         'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
 80     }
 81 }
 82 
 83 
 84 # Password validation
 85 # https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators
 86 
 87 AUTH_PASSWORD_VALIDATORS = [
 88     {
 89         'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
 90     },
 91     {
 92         'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
 93     },
 94     {
 95         'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
 96     },
 97     {
 98         'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
 99     },
100 ]
101 
102 
103 # Internationalization
104 # https://docs.djangoproject.com/en/1.11/topics/i18n/
105 
106 LANGUAGE_CODE = 'en-us'
107 
108 TIME_ZONE = 'UTC'
109 
110 USE_I18N = True
111 
112 USE_L10N = True
113 
114 USE_TZ = True
115 
116 
117 # Static files (CSS, JavaScript, Images)
118 # https://docs.djangoproject.com/en/1.11/howto/static-files/
119 
120 STATIC_URL = '/static/'
121 STATICFILES_DIRS = (
122     os.path.join(BASE_DIR, 'static' ),
123                     )

settings.py

 1 <!DOCTYPE html>
 2 <html lang="en">
 3 <head>
 4     <meta charset="UTF-8">
 5     <title>Title</title>
 6     <link rel="stylesheet" href="/static/commons.css"/>
 7     <style>
 8         label{
 9             width:80px;
10             text-align:right;
11             display: inline-block;
12         }
13     </style>
14 </head>
15 <body>
16 
17     <form action="/login" method="post">
18         <p>
19             <label for="username">用户名：</label>
20             <input id="username" name="user" type='text'/>
21         </p>
22         <p>
23              <label for="password">密码：</label>
24              <input id="password" name="pwd" type='password'/>
25              <input type="submit" value="提交"/>
26             <span style="color:red;">{{ error_msg }}</span>
27         </p>
28     </form>
29     <script src ="/static/jquery.min.js"></script>
30 </body>
31 </html>

其他文件参考以下步骤

用JetBrains PyCharm 2017.2创建运行Django程序
http://www.cnblogs.com/ujq3/p/7882030.html

创建多个Django业务模块
http://www.cnblogs.com/ujq3/p/7884075.html

Django多业务模块的写法
http://www.cnblogs.com/ujq3/p/7884279.html

Django与HTML业务基本结合--基本的用户名密码提交方法2
http://www.cnblogs.com/ujq3/p/7884615.html

Django静态文件以及模板文件的配置
http://www.cnblogs.com/ujq3/p/7884881.html

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原文地址：https://www.cnblogs.com/ujq3/p/7891352.html