1
我想在WTForm中的Jinja2中引发一个错误，如果url输入未经过验证，应该引发错误，但是当我提交一个无效url时， “请输入一个网址”。使用jinja2在WTForm中引发错误
如何传递默认弹出窗口并添加自定义错误消息？
这里是主要潘岳：
from datetime import datetime
from flask import Flask, render_template, url_for, request, redirect,flash
from logging import DEBUG
from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField
from flask.ext.wtf.html5 import URLField
from wtforms.validators import DataRequired , url
app = Flask(__name__)
app.logger.setLevel(DEBUG)
app.config['SECRET_KEY']='{@\x8d\x90\xbf\x89n\x06%`I\xfa(d\xc2\x0e\xfa\xb7>\x81?\x86\x7f\x1e'
@app.route('/')
@app.route('/index')
def index():
return render_template('base.html')
@app.route('/add', methods=['GET','POST'])
def add():
return render_template('add.html')
# HERE IS THE LOGIN FORM
class Login(FlaskForm):
username = StringField('username')
password = PasswordField('password')
url = URLField('url', validators=[DataRequired(),url()])
@app.route('/form', methods=['GET','POST'])
def form():
form = Login()
if form.validate_on_submit():
url = form.url.data
return redirect(url_for('index'))
return render_template('form.html',form = form)
if __name__ =='__main__':
app.run(debug=True)
这里是模板：
<!DOCTYPE html>
<html>
<head>
<title>form</title>
</head>
<body>
<h1>Hello !</h1>
<form method="POST" action="{{url_for('form')}}">
{{ form.hidden_tag() }}
{{ form.csrf_token }}
{{ form.username.label }}
{{ form.username }}
{{ form.password.label }}
{{ form.password }}
{{ form.url.label }}
{{ form.url }}
{% if form.url.errors %} <p> {{error}}</p> {% endif %}
<button type="submit">Submit</button>
</form>
</body>
</html>
