Format of Time with SQLAlchemy (and daterangepicker)

[nypgand1]

Briefly speaking, I 'm try to use the '%M:%S' format of Time like 23:30.

What I have done:

1. Set the form_args and form_widget_args variable of ModelView like example here https://github.com/flask-admin/flask-admin/blob/master/flask_admin/model/base.py#L572
2. Make a new AdminModelConverter which override the method convert_time to return TimeField object with formats=('%H:%M:%S', '%M:%S') and default_formatt='%M:%S'.

What I got and need help with:

1. A edit page with '%M:%S' format, but a list page with '%H:%M:%S' format.
2. A pop up daterangepicker with hour selector & minute selector instead of minute selector & second selector in the edit page which I want.

If TimeField's formats=(''%M:%S') only, it says 'Invalid time format' all the time when I press save in edit page.

And I found that the widget_format parameter in constructor of TimeField may not be used anymore.
https://github.com/flask-admin/flask-admin/blob/master/flask_admin/form/fields.py#L48

[nypgand1]

Alright, I figure it out.
Leave my comment here for others who needs it.

I got my CustomModelView like the following:

class CustomModelView(ModelView):
    # changes how the input is parsed by strptime (12 hour time)
    form_args = dict(
        clock_start=dict(default_format='%M:%S', formats=('%H:%M:%S', '%M:%S')),
        clock_end=dict(default_format='%M:%S', formats=('%H:%M:%S', '%M:%S'))
    )
    # changes how the TimeField displays the time
    form_widget_args = dict(
        clock_start={'data-role': u'timepickersecs', 'data-date-format': u'mm:ss'},
        clock_end={'data-role': u'timepickersecs', 'data-date-format': u'mm:ss'}
    )
    column_formatters = dict(
        clock_start=lambda v, c, m, p:m.clock_start.strftime('%M:%S'),
        clock_end=lambda v, c, m, p:m.clock_end.strftime('%M:%S')
    )

And it shows right in both list and edit page.
(The 'data-role' part will be explained next)

I found a timePickerSeconds option here:
https://github.com/flask-admin/flask-admin/blob/master/flask_admin/static/vendor/bootstrap-daterangepicker/daterangepicker.js#L1281
So I add a new data-role 'timepickersecs' copy from here:
https://github.com/flask-admin/flask-admin/blob/master/flask_admin/static/admin/js/form.js#L398
with timePickerSeconds: true, and it's all good