Flask WTForm BooleanField用法

最近学习Flask-web框架，进行到登陆，教程就过于快，自己遇到一个问题要很久才能解决，

BooleanField使用场景：进行选择框，比如：登陆界面，是否记住密码，那个选择框，就可以使用BooleanField来进行操作。

BooleanField用法介绍很少，查不到，现在解决了所以就做这个笔记。

先来引用官方的介绍：

class wtforms.fields.BooleanField(default field arguments, false_values=None)

Represents an <input type="checkbox">. Set the checked-status by using the default-option. Any value for default, e.g. default="checked" puts checked into the html-element and sets the data to True

Parameters: false_values – If provided, a sequence of strings each of which is an exact match string of what is considered a “false” value. Defaults to the tuple ('false', '')

Parameters:	false_values – If provided, a sequence of strings each of which is an exact match string of what is considered a “false” value. Defaults to the tuple `('false', '')`

这句话不是很好理解，不能很很好的知道BooleanField的具体用法，下面使用在StackoverFlow查到的例子：

.py文件

 1 from flask import Flask, render_template
 2 from flask_wtf import Form
 3 from wtforms import BooleanField
 4 from wtforms.validators import DataRequired
 5 
 6 app = Flask(__name__)
 7 app.secret_key = 'STACKOVERFLOW'
 8 
 9 class ExampleForm(Form):
10     checkbox = BooleanField('Agree?', validators=[DataRequired(), ])  #这是主要用法
11 
12 @app.route('/', methods=['post', 'get'])
13 def home():
14     form = ExampleForm()
15     if form.validate_on_submit():
16         return str(form.checkbox.data)
17     else:
18         return render_template('example.html', form=form)
19 
20 
21 if __name__ == '__main__':
22     app.run(debug=True, port=5060)

渲染视图文件.html：

1 <form method="post">
2     {{ form.hidden_tag() }}
3     {{ form.checkbox() }}　　　　#这是主要用法
4     <button type="submit">Go!</button>
5 </form>
6 
7 <h1>Form Errors</h1>
8 {{ form.errors }}