flask wtf表单的使用

#wtf.py
#   coding=utf-8
from flask import Flask, render_template,redirect
from flask_wtf import Form
from wtforms import StringField, SubmitField
from wtforms.validators import DataRequired

app = Flask(__name__)
app.config['SECRET_KEY'] = 'wanghaowanghao'         # 必须 用于加密


class MyForm(Form):
    user = StringField('username', validators=[DataRequired()])
    # submit = SubmitField('submit')


@app.route('/')
def index():
    form = MyForm()

    return render_template('index.htm', form=form)


@app.route('/login', methods=('GET', 'POST'))
def login():
    form = MyForm()
    print form.data['user']  #admin
    print form.validate_on_submit()
    if form.validate_on_submit():
        if form.data['user'] == 'admin':
            return 'Admin login successfully!'
        else:
            return 'Wrong user!'

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

if __name__ == '__main__':
    app.run(port=3100, debug=True, host='0.0.0.0')

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="/static/jq.js"></script>
</head>
<body>
<form method="POST" action="/login">


{#    {{ form.csrf_token }}              这两个必须要一个 #}

    {{ form.hidden_tag() }}

    <label for="user">Username</label>: <input id="username" name="user" size="20" type="text" value="admin">

    <input type="submit" value="submit" id="submit">
</form>
  
</body>
</html>

官网：http://flask-wtf.readthedocs.io/en/stable/quickstart.html

完整代码：https://github.com/sideFlower/wanghao/tree/master/wtf