wtforms 简单使用

from flask import Flask,request,render_template

from wtforms import Form,StringField

from wtforms import validators

from wtforms.validators import Length,EqualTo

class RegisterForm(Form):

    username = StringField(validators=[Length(max=10,min=3,message='用户名长度不正确')])

    password = StringField(validators=[Length(max=10,min=3,message='密码长度不正确')])

    password_repeat = StringField(validators=[Length(max=10,min=3,message='密码长度不正确'),EqualTo('password')])

app = Flask(__name__)

@app.route('/')

def hello_world():

    return 'Hello World!'

@app.route('/register/',methods=['get','post'])

def register():

    if request.method == 'GET':

        return render_template('register.html')

    else:

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

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

        # password_repeat = request.form.get('password_repeat')

        # if 3 > len(username) or len(username)> 10:

        #     return '用户名长度不正确'

        # if 3 > len(password) or len(password)> 10:

        #     return '密码长度不正确'

        # if password != password_repeat:

        #     return '密码输入不一致'

        form = RegisterForm(request.form)

        if form.validate():

            return 'success'

        else:

            print(form.errors)#{'username': ['用户名长度不正确'],

            # 'password': ['密码长度不正确'], 'password_repeat': ['密码长度不正确']}

            #因为是字典，获取方式我就不写了

            return 'fail'

if __name__ == '__main__':

    app.run(debug=True)