WTForms日期验证 [英] WTForms date validation
问题描述
我目前正在尝试使用Flask构建一个简单的Web应用程序.与此同时，我也使用了WTForms，但是我在从表单获取日期信息并对其进行验证时遇到了问题.
I am currently trying to build a simple web application using Flask. With this i am also using WTForms, however i am having problem with getting date information from the form and getting it validated.
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")
然后在路线中，我有以下内容:
Then in routes i have the following:
@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'))
....
并在视图中:
....
<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，当表单被提交时，我尝试获取数据，但事实却并非如此.这是从路由中的打印语句给出的输出:
but here comes the problem, when the form is submitted and i try to get the data it says it is none. This is the output that is given from the print statements in route:
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.']}
我已经尝试在WTForms文档和google中都找到了答案，但没有结果.
I have tried to find the answer in both the WTForms docs and using google with no result.
在此先感谢您，如果需要更多信息，请发送邮件或发表评论.
Thanks in advance and just send a message or comment if more information is needed.
推荐答案
WTForm自定义日期验证比较两个日期开始日期和结束日期 日期[开始日期不应大于结束日期 错误].
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].
DateExample.py
DateExample.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
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>
这篇关于WTForms日期验证的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
