【Flask】wtforms表单验证

forms.py

import wtforms
from wtforms.validators import length,email

# 登录的验证器
class LoginForm(wtforms.Form):
    email = wtforms.StringField(validators=[length(min=5,max=20),email()])
    password = wtforms.StringField(validators=[length(min=6,max=20)])

login.html

    
    



    
        
            邮箱:
            
        
        
            密码:
            
        
        
            登录
            
        
    

app.py

from flask import Flask,request,render_template
from forms import LoginForm

app = Flask(__name__)


@app.route('/')
def hello_world():  # put application's code here
    return 'Hello World!'

@app.route('/login',methods=['GET','POST'])
def login():
    if request.method == 'GET':
        return render_template('login.html')
    else:
        form = LoginForm(request.form)
        if form.validate():
            return '登录成功'
        else:
            return "邮箱或密码错误!"

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