Wtrofms
2024-08-27 02:57:07
一、安装
安装:pip3 install wtforms
二、使用1(登录)
from flask import Flask, render_template, request, redirect
from wtforms import Form
from wtforms.fields import simple
from wtforms import validators
from wtforms import widgets app = Flask(__name__, template_folder='templates') app.debug = True class LoginForm(Form):
# 字段(内部包含正则表达式)
name = simple.StringField(
label='用户名',
validators=[
validators.DataRequired(message='用户名不能为空.'),
validators.Length(min=6, max=18, message='用户名长度必须大于%(min)d且小于%(max)d')
],
widget=widgets.TextInput(), # 页面上显示的插件
render_kw={'class': 'form-control'} )
# 字段(内部包含正则表达式)
pwd = simple.PasswordField(
label='密码',
validators=[
validators.DataRequired(message='密码不能为空.'),
validators.Length(min=8, message='用户名长度必须大于%(min)d'),
validators.Regexp(regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[$@$!%*?&])[A-Za-z\d$@$!%*?&]{8,}",
message='密码至少8个字符,至少1个大写字母,1个小写字母,1个数字和1个特殊字符') ],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
) @app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
form = LoginForm()
return render_template('login.html', form=form)
else:
form = LoginForm(formdata=request.form)
if form.validate():
print('用户提交数据通过格式验证,提交的值为:', form.data)
else:
print(form.errors)
return render_template('login.html', form=form) if __name__ == '__main__':
app.run()
login.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>登录</h1>
<form method="post">
<p>{{form.name.label}} {{form.name}} {{form.name.errors[0] }}</p> <p>{{form.pwd.label}} {{form.pwd}} {{form.pwd.errors[0] }}</p>
<input type="submit" value="提交">
</form>
</body>
</html>
三、使用二(注册)
register.py
from flask import Flask, render_template, request, redirect
from wtforms import Form
from wtforms.fields import core
from wtforms.fields import html5
from wtforms.fields import simple
from wtforms import validators
from wtforms import widgets app = Flask(__name__, template_folder='templates')
app.debug = True class RegisterForm(Form):
name = simple.StringField(
label='用户名',
validators=[
validators.DataRequired()
],
widget=widgets.TextInput(),
render_kw={'class': 'form-control'},
default='alex'
) pwd = simple.PasswordField(
label='密码',
validators=[
validators.DataRequired(message='密码不能为空.')
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
) pwd_confirm = simple.PasswordField(
label='重复密码',
validators=[
validators.DataRequired(message='重复密码不能为空.'),
validators.EqualTo('pwd', message="两次密码输入不一致")
],
widget=widgets.PasswordInput(),
render_kw={'class': 'form-control'}
) email = html5.EmailField(
label='邮箱',
validators=[
validators.DataRequired(message='邮箱不能为空.'),
validators.Email(message='邮箱格式错误')
],
widget=widgets.TextInput(input_type='email'),
render_kw={'class': 'form-control'}
) gender = core.RadioField(
label='性别',
choices=(
(1, '男'),
(2, '女'),
),
coerce=int # “1” “2”
)
city = core.SelectField(
label='城市',
choices=(
('bj', '北京'),
('sh', '上海'),
)
) hobby = core.SelectMultipleField(
label='爱好',
choices=(
(1, '篮球'),
(2, '足球'),
),
coerce=int
) favor = core.SelectMultipleField(
label='喜好',
choices=(
(1, '篮球'),
(2, '足球'),
),
widget=widgets.ListWidget(prefix_label=False),
option_widget=widgets.CheckboxInput(),
coerce=int,
default=[1, 2]
) def __init__(self, *args, **kwargs):
super(RegisterForm, self).__init__(*args, **kwargs)
self.favor.choices = ((1, '篮球'), (2, '足球'), (3, '羽毛球')) def validate_pwd_confirm(self, field):
"""
自定义pwd_confirm字段规则,例:与pwd字段是否一致
:param field:
:return:
"""
# 最开始初始化时,self.data中已经有所有的值 if field.data != self.data['pwd']:
# raise validators.ValidationError("密码不一致") # 继续后续验证
raise validators.StopValidation("密码不一致") # 不再继续后续验证 @app.route('/register', methods=['GET', 'POST'])
def register():
if request.method == 'GET':
form = RegisterForm(data={'gender': 2,'hobby':[1,]}) # initial
return render_template('register.html', form=form)
else:
form = RegisterForm(formdata=request.form)
if form.validate():
print('用户提交数据通过格式验证,提交的值为:', form.data)
else:
print(form.errors)
return render_template('register.html', form=form) if __name__ == '__main__':
app.run()
register.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<h1>用户注册</h1>
<form method="post" novalidate style="padding:0 50px">
{% for field in form %}
<p>{{field.label}}: {{field}} {{field.errors[0] }}</p>
{% endfor %}
<input type="submit" value="提交">
</form>
</body>
</html>
最新文章
- nginx转发会 默认忽略 headers 中name带&rdquo;_&rdquo;的
- CSS动态伪类选择器温故-3
- APICloud云修复再升级 增加热重启APP功能
- linux下inotify的使用
- Hadoop no.1
- 改成 否“依然报LINK : fatal error LNK1123: 转换到 COFF 期间失败: 文件无效或损坏”问题的解决
- HDU 2370 Convert Kilometers to Miles
- python Day 2 - 编写数据库模块
- wildcard 处理全部文件
- CodeForces 55D Beautiful numbers(数位dp)
- BZOJ3296: [USACO2011 Open] Learning Languages
- Objective-c 中的算术函数和常数的表示
- linux:基本命令
- DOS(Disk Operation System:磁盘操作系统)常见命令
- css简单实现五角星评分、点赞收藏、展示评分(半颗星、1/3颗星)
- Spring_Spring与IoC_Bean的装配
- python3 lcs 最大公共子序列
- 2019浙大校赛--A--Thanks, TuSimple!(简单模拟题)
- ZOJ Problem Set - 2397 Tian Ji -- The Horse Racing
- Confluence 6 恢复一个站点有关使用站点导出为备份的说明