gpt4 book ai didi

flask - WTForms 日期验证

转载 作者:行者123 更新时间:2023-12-05 05:17:01 26 4
gpt4 key购买 nike

我目前正在尝试使用 Flask 构建一个简单的 Web 应用程序。有了这个,我也在使用 WTForms,但是我在从表单中获取日期信息并对其进行验证时遇到了问题。

这是表格:

from flask_wtf import FlaskForm
from wtforms import SubmitField
from wtforms.fields.html5 import DateField
from wtforms.validators import DataRequired
from datetime import date

class LeasForm(FlaskForm):
start_date = DateField("Start date", default=date.today(), format='%d/%m/%Y', validators=[DataRequired(message="You need to enter the start date")],)
end_date = DateField("End date", validators=[DataRequired(message="You need to enter the end date.")], format='%d/%m/%Y')
submit = SubmitField("To payment")

然后在 route 我有以下内容:

@app.route('/url/<int:some_id>', methods=['GET', 'POST'])
def some_route(some_id):
....
form = LeasForm()
print("Request form: {}".format(request.form))
print("Start date data: {}".format(form.start_date.data))
print("End date data: {}".format(form.end_date.data))
print("Leas form: {}".format(form.validate()))
print("Leas form errors: {}".format(form.errors))
if form.validate():
return redirect(url_for('another_url'))
....

在 View 中:

....
<form action="" method="post">
<div>{{form.errors}}</div>
{{ form.hidden_tag() }}
{{ form.start_date.title}}
{{ form.start_date}}
{{ form.end_date.title}}
{{ form.end_date}}
{{ form.submit}}
</form>

但是问题来了,当提交表单并且我尝试获取它说没有的数据时。这是路由中打印语句给出的输出:

Request form: ImmutableMultiDict([('csrf_token', 'CHANGED_TOKEN'), ('start_date', '2018-04-04'), ('end_date', '2018-04-06'), ('submit', 'To payment')])
Start date data: None
End date data: None
Leas form: False
Leas form errors: {'start_date': ['You need to enter the start date'], 'end_date': ['You need to enter the end date.']}

我试图在 WTForms 文档和使用谷歌中找到答案,但没有结果。

在此先致谢,如果需要更多信息,请发送消息或发表评论。

最佳答案

WTForm custom date validation compare two dates Start date and End date [Start date should not be greater than end date if so give error].

日期示例.py

    from flask import Flask, render_template
from flask_wtf import FlaskForm
from datetime import date
from wtforms.fields.html5 import DateField
from wtforms.fields.html5 import DateTimeField

app = Flask(__name__)
app.config['SECRET_KEY']='secretkey'

class TestForm(FlaskForm):
startdate = DateField('Start Date',default=date.today)
enddate = DateField('End Date',default=date.today)

def validate_on_submit(self):
result = super(TestForm, self).validate()
if (self.startdate.data>self.enddate.data):
return False
else:
return result

@app.route('/dateExample',methods=['GET','POST'])
def index():
error = None
form = TestForm()
if form.validate_on_submit():
return 'Start Date is : {} End Date is : {}'.format(form.startdate.data, form.enddate.data)
else:
error = "Start date is greater than End date"
return render_template('dateExample.html',form=form,error = error)

if __name__ =="__main__":
app.run(debug=True,port=5000)

DateExample.html

<html>
<body>
<h1> Flask WFForm </h1>

{% if error %}
<p><strong> Error: </strong></p> {{error}}
{% endif %}

<form method="POST" action="{{url_for('index')}}">
{{ form.csrf_token }}
{{ form.startdate.label }}
{{ form.startdate }}
{{ form.enddate.label }}
{{ form.enddate }}
<input type="submit" value="Submit">
</form>
</body>
</html>

关于flask - WTForms 日期验证,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/49633323/

26 4 0
Copyright 2021 - 2024 cfsdn All Rights Reserved 蜀ICP备2022000587号
广告合作:1813099741@qq.com 6ren.com