Good Day, Gonna asked how to inherit the two models from different model. I want to inherit the field "min_date" from stock.picking and also the field "date_invoice" from account.invoice. But I can only inherit the min_date

from odoo import fields,models,api


class Picking(models.Model):
_inherit ='stock.picking'

force_date = fields.Datetime("Put Dates")
min_date = fields.Datetime('Please Change', related="force_date",store=True)


@api.multi
def write(self,vals):
record = super(Picking,self).write(vals)
print("Test the Edit Button")
print("Schedule " + self.min_date)
print("Next")
return record

class SaleOrder(models.Model):
_inherit = 'sale.order'

confirmation_date = field.DateTime('Change This')

I think this is not right............................

Please help me, any hint or documentation that I can study to, Thank in advance and what is related mean in the field? Does it update the record in the database?