Flask表单（Flask-WTF）

1、request.from获取POST表单数据

# hello.py

 #coding:utf-8

 from flask import Flask,request,render_template

 app = Flask(__name__)

 @app.route('/',methods=['GET']) #methods是一个列表

 def home():

     return render_template('home.html')

 @app.route('/signin',methods=['GET'])

 def signin_form():

     return render_template('form.html')

 @app.route('/signin',methods=['POST'])

 def signin():

     username = request.form['username']

     password = request.form['password']

     if username == 'admin' and password == 'password':

         return render_template('signin-ok.html',username=username)

     else:

         return render_template('form.html',message='用户名或者密码错误，请重新登陆>>',username=username)

 if __name__ == '__main__':

     app.run()

# form.html

 <!DOCTYPE html>

 <html>

     <meta charset="utf-8">

     <head>

         <title>登陆界面</title>

     </head>

     <body>

         {% if message %}

             <p style="color:red">{{ message }}</p>

         {% endif %}

         <form action='/signin' method="post">

             <legend>请登陆您的账号：</legend>

             <input type="text" name="username" placeholder='Username' value="{{ username }}"><br>

             <input type="password" name="password" placeholder="Password" value="{{ password }}"><br>

             <button type="submit">登陆</button>

         </form>

     </body>

 </html>

# home.html

 <!DOCTYPE html>

 <html>

     <meta charset="utf-8">

     <head>

         <title>主页</title>

     </head>

     <body>

         <h1>你好，欢迎来到首页</h1>

         <p><a href="/signin">点击登陆</a></p>

     </body>

 </html>

#signin-ok.html

 <!DOCTYPE html>

 <html>

     <meta charset="utf-8">

     <head>

         <title>登陆成功</title>

     </head>

     <body>

         <h1>欢迎你，{{ username }}</h1>

     </body>

 </html>

2、使用Flask-WTF扩展

# hello.py

 #coding:utf-8

 from flask import Flask,render_template

 from flask.ext.bootstrap import Bootstrap

 from flask.ext.wtf import Form

 from wtforms import StringField,SubmitField

 from wtforms.validators import Required

 app = Flask(__name__)

 app.config['SECRET_KEY']='hard to guess string'

 bootstrap = Bootstrap(app)

 class NameForm(Form):

     name = StringField('what is your name?',validators=[Required()])

     submit = SubmitField('Submit')

 @app.route('/',methods=['GET','POST'])

 def index():

     name = None

     form = NameForm()

     if form.validate_on_submit():

         name = form.name.data #没有这一步，submit后name=None

         form.name.data = ''   #没有这一步，submit后文字框还会遗留上一次输入的文字

     return render_template('index.html',form=form,name=name)

 if __name__ == '__main__':

     app.run()

# index.py

 {% extends "base.html" %}

 {% import "bootstrap/wtf.html" as wtf %}  

 {% block title %}Flasky{% endblock %}  

 {% block page_content %}

 <div class="page-header">

     <h1>Hello, {% if name %}{{ name }}{% else %}Stranger{% endif %}!</h1>

 </div>

 <!-- 导入wtf.html渲染整个Flsk-WTF表单，参数form是hello.py中传过来的form实例-->

 {{ wtf.quick_form(form) }}

 {% endblock %}

附：共同的基模板

# base.html

 {% extends "bootstrap/base.html" %}

 {% block title %}Flasky{% endblock %}

 {% block navbar %}

 <div class="navbar navbar-inverse" role="navigation">

 <div class="container">

     <div class="navbar-header">

         <button type="button" class="navbar-toggle" data-toggle="collapse" data-target=".navbar-collapse">

             <span class="sr-only">Toggle navigation</span>

             <span class="icon-bar"></span>

             <span class="icon-bar"></span>

             <span class="icon-bar"></span>

         </button>

         <a class="navbar-brand" href="/">Flasky</a>

     </div>

     <div class="navbar-collapse collapse">

         <ul class="nav navbar-nav">

             <li><a href="/">Home</a></li>

             <li><a href="/">Twitter</a></li>

             <li><a href="/">Blog</a></li>

         </ul>

     </div>

 </div>

 </div>

 {% endblock %}

 {% block content %}

 <div class="container">

     <div class="page-header">

         {% block page_content %}{% endblock %}

     </div>

 </div>

 {% endblock %}

巴特西

Flask表单（Flask-WTF）

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