WTF表单验证

WTF表单验证可分为3个步骤：

①导入wtf扩展提供的表单验证器。（from wtforms.validators import DataRequired,EqualTo）

②定义表单类

# 定义表单类

class RegisterForm(FlaskForm):

    username =StringField('账号：',validators=[DataRequired()])

    password =PasswordField('密码：',validators=[DataRequired()])

    password2 = PasswordField('确认密码：',validators=[DataRequired(),EqualTo('password','两次密码不一致')])

    submit=SubmitField('提交')

③验证逻辑（判断请求方式——>请求参数——>验证）

redist_form=RegisterForm()

    if request.method=='POST':

        username=request.form.get('username')

        password = request.form.get('password')

        password2 = request.form.get('password2')

        if redist_form.validate_on_submit():

            print(username,password)

            return 'success'

        else:

            flash('参数有误')

    return render_template('registform.html',form=redist_form)

完整代码：

app.py

from flask import Flask,render_template,request,flash

from flask_wtf import FlaskForm

from wtforms import StringField, PasswordField,SubmitField

from wtforms.validators import EqualTo,DataRequired

app = Flask(__name__)

app.secret_key='yingjie'

# 定义表单类

class RegisterForm(FlaskForm):

    username =StringField('账号：',validators=[DataRequired()])

    password =PasswordField('密码：',validators=[DataRequired()])

    password2 = PasswordField('确认密码：',validators=[DataRequired(),EqualTo('password','两次密码不一致')])

    submit=SubmitField('提交')

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

def regist_form():

    redist_form=RegisterForm()

    if request.method=='POST':

        username=request.form.get('username')

        password = request.form.get('password')

        password2 = request.form.get('password2')

        if redist_form.validate_on_submit():

            print(username,password)

            return 'success'

        else:

            flash('参数有误')

    return render_template('registform.html',form=redist_form)

if __name__ == '__main__':

    app.run()

registform.html

<!DOCTYPE html>

<html lang="en">

<head>

    <meta charset="UTF-8">

    <title>Title</title>

</head>

<body>

    <form method="post">

        {{ form.csrf_token() }}

        {{ form.username.label }}{{ form.username }}<br>

        {{ form.password.label }}{{ form.password }}<br>

        {{ form.password2.label }}{{ form.password2 }}<br>

        {{ form.submit }}

    </form>

{% for message in get_flashed_messages() %}

        {{ message }}

{% endfor %}

</body>

</html>

运行截图：

巴特西

WTF表单验证

WTF表单验证可分为3个步骤：

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