Suppose I have 2 models:

modela.py :

    start_date = fields.Date('Date working')

modelb.py:

    name = fields.Many2one('hr.employee', 'Employee')

    start_datetime = fields.Datetime('Datetime working')

In modelb.py, I created 3 records via field name and start_datetime:

Employee Name              Datetime working

A                                        10/18/2021    07.00

B                                        10/18/2021    08.00

C                                        10/18/2021    09.00

In modela.py, I selected via field start_date: 10/18/2021

and want to load ALL records of modelb.py which have: 10/18/2021 without going through time, via the function button using @onchange('Date')

I'd tried to convert the start_datetime from Datetime to Date in modelb.py First like this:

        import dateutil.parser

        start_datetime = fields.Datetime('Datetime working')

        get_date = dateutil.parser.parse(start_datetime).date()

But I got Errors this way.

Note: I want to keep the format of the start_datetime field as Datetime.

So how to get/load Date from the Datetime field in Odoo 13?

Please help!

Thank you!