python 3.x - Wtforms.fields.html5 DateField not working as plain old DateField in Flask -

i have problem getting html5 datepicker provide value form in flask using wtf-forms. same form working expected if drop html5 datefield plain old vanilla wtf-forms datefield.

for curious: versions: python 3.5.2, flask: 0.11.1, flask-wtf: 0.12

the relevant code be:

model:

class order(db.model):     __tablename__ = 'orders'     paid_date = db.column(db.datetime, nullable=true) 

form shouldn't make difference completeness here snippet order-update.html:

    <div class="form-group">         {{ form.paid_date.label }}         {% if form.paid_date.errors %}           {% error in form.paid_date.errors %}               <p class="error-message">{{  error }}</p>           {% endfor %}         {%  endif %}         {{ form.paid_date }}     </div> 

minimal controller:

@app.route('/orders/update/<int:order_number>', methods=['get', 'post']) def update_order(order_number):     order = order.query.get(order_number)     if request.method == 'post':         if not form.validate():             return render_template('update-order.html', form=form, order=order)         else:             form.populate_obj(order)             db.session.commit()         return redirect(url_for('user')     elif request.method == 'get':         return render_template('update-order.html', form=form, order=order) 

here works form declaration:

from flask_wtf import form wtforms import datefield  class updateorderform(form):     paid_date = datefield('date order paid', format='%m/%d/%y',                           render_kw={'placeholder': '6/20/15 june 20, 2015'})     submit = submitfield('update order') 

while following break:

from flask_wtf import form wtforms.fields.html5 import datefield  class updateorderform(form):     paid_date = datefield('date order paid', format='%m/%d/%y',                           render_kw={'placeholder': '6/20/15 june 20, 2015'})     submit = submitfield('update order') 

to describe behavior, plain datefield, render form string input (which displaying present value should after form.populate_obj() allows me stick in new date, e.g., 9/12/16, , passes controller form.paid_date datefield, has value of 09/20/16, , form.paid_date.data=2016-09-20. passes validation , commits db.

when switch html5 date picker, nice have, render form datepicker (i set present date in object btw) has form.paid_date above, i.e., datefield , value same. however, datepicker showing mm/dd/yyyy. if enter 09/20/2016 either hand or picker , submit, form.paid_date.data comes none. furthermore, have

process_errors = <class 'list'>: ['not valid date value']

raw_data = <class 'list'>: ['2016-09-20'].

so see data returned, doesn't pass form processing , placed data slot. can write code pull out raw_data surely missing or bug!?

i found out in chrome browser raw_data ['2011-01-01'] doesn't match time format!

you should change this:

format='%y-%m-%d',