五十三：WTForms表单验证之常用验证器

Email：验证数据是否为邮箱
EqualTo：验证此字段的数据是否和另一个字段的值相等，常用与校验密码和确认密码
InputRequired：检验数据必传
Length：校验数据长度
NumberRange：检验数据需在指定数字的区间
Regexp：自定义正则表达式（如手机号码）
URL：必须是url的形式
UUID：必须是UUID

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册</title>
</head>
<body>
<form action="#" method="post">
    <table>
        <tbody>
        <tr>
            <td>用户名：</td>
            <td><input type="text" name="username"></td>
        </tr>
        <tr>
            <td>邮箱：</td>
            <td><input type="text" name="email"></td>
        </tr>
        <tr>
            <td>年龄：</td>
            <td><input type="text" name="age"></td>
        </tr>
        <tr>
            <td>手机号：</td>
            <td><input type="text" name="phone"></td>
        </tr>
        <tr>
            <td>个人主页：</td>
            <td><input type="text" name="home_page"></td>
        </tr>
        <tr>
            <td>uuid：</td>
            <td><input type="text" name="uuid"></td>
        </tr>
        <tr>
            <td>密码：</td>
            <td><input type="text" name="password"></td>
        </tr>
        <tr>
            <td>确认密码：</td>
            <td><input type="text" name="check_password"></td>
        </tr>
        <tr>
            <td></td>
            <td><input type="submit" value="点击注册"></td>
        </tr>
        </tbody>
    </table>
</form>
</body>
</html>

from wtforms import Form, StringField, IntegerField
from wtforms.validators import Length, EqualTo, Email, InputRequired, NumberRange, Regexp, URL, UUID

class RegistForm(Form):
    """ 注册参数验证 """
    # form表单中参数的name属性值
    username = StringField(validators=[Length(3, 10, message='用户名长度为3~10位')])
    email = StringField(validators=[Email(message='非邮箱格式')])
    password = StringField(validators=[InputRequired(message='密码必传'), Length(6, 10, message='密码长度为6~10位')])
    check_password = StringField(validators=[Length(6, 10, message='密码长度为6~10位'), EqualTo('password', message='两次密码不一致')])
    age = IntegerField(validators=[NumberRange(18, 50, message='年龄需为18~50岁')])
    phone = StringField(validators=[Regexp(r'1[34578]\d{9}', message='手机号格式错误')])
    home_page = StringField(validators=[URL(message='home_page必须为url格式')])
    uuid = StringField(validators=[UUID(message='uuid格式错误')])

from flask import Flask, request, render_template

from forms import RegistForm

app = Flask(__name__)

@app.route('/regist/', methods=['GET', 'POST'])
def regist():
    form = RegistForm(request.form)
    if request.method == 'POST':
        if form.validate():
            return '验证通过'
        else:
            print(form.errors)
            return form.errors
    return render_template('regist.html')

if __name__ == '__main__':
    app.run(debug=True)

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五十三：WTForms表单验证之常用验证器

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