How to parse data on parent write method?

Support Developer
1

I have a child class as below:

class ProjectPeriod(ModelSQL, ModelView):
    "Project Period"
    __name__ = "afx.project.period"
    _rec_name = 'po_no'

    update_mode = fields.Selection([
            (None, 'None'),
            ('MOVE_PERIOD', 'Move Period'),
            ('UPDATE_DATE', 'Update Date')
        ], 'Update Mode', sort=False,
        states={
            'invisible': Eval('id', -1) < 0,
        }
    )
    project = fields.Many2One('afx.project', "Project", required=True, ondelete='CASCADE')
    proj_phase = fields.Char("Project Phase", required=False, states={
        'readonly': True
    })
    start_date = fields.Date("Period Start Date", required=True, 
        states={
            'readonly': Eval('is_running', False) == True,
        }
    )
    end_date = fields.Date("Period End Date", required=True, 
        states={
            'readonly': Eval('is_running', False) == True,
        }
    )
    chargeable = fields.Boolean("Chargeable", 
        states={
            'readonly': Eval('is_running', False) == True,
        }
    )
    sow_no = fields.Char("SOW Number", 
        states={
            'invisible': Eval('chargeable', False) == False,
            'readonly': Eval('is_phase_different', False) == True,
        }
    )
    po_no = fields.Char("PO Number", 
        states={
            'invisible': Eval('chargeable', False) == False,
            'readonly': Eval('is_phase_different', False) == True,
        }
    )
    quot_no = fields.Char("Quotation Number", 
        states={
            'invisible': Eval('chargeable', False) == False,
            'readonly': Eval('is_phase_different', False) == True,
        }
    )
    loa = fields.Char("LOA", 
        states={
            'invisible': Eval('chargeable', False) == False,
            'readonly': Eval('is_phase_different', False) == True,
        }
    )
    remark = fields.Char('Remark', states={
        'readonly': Eval('is_phase_different', False) == True,
    })
    commitment = fields.Integer('Commitment (Days)', 
        states={
            'required': Eval('is_support', False) == True,
            'readonly': Or(
                Eval('is_running', False) == True,
                Eval('is_phase_different', False) == True,
            )
        }
    )
    uuid = fields.Char('UUID', states= {
        'invisible': True,
        'readonly': True,
    })

And inside a parent class I have One2Many of the above object under planning_periods_on_details_pg field as below:

    planning_periods_on_details_pg = fields.One2Many('afx.project.period', 'project', "Planned Periods", 
        required=False,
        filter=[('proj_phase', '=', 'PLANNING')],
        order=[('start_date', 'asc')],
        states={
            'readonly': Eval('id', -1) < 0,
            'invisible': Or(
                Eval('proj_type_view') == 'SUPPORT-SP',
                Eval('proj_type_view') == 'SUPPORT-MP',
            ),
        }, depends=['id','proj_type_view']
    )

During updates and parent class execute def write method, and I received data something like below:

[['add', [506, 507]], ['write', [506], {'end_date': datetime.date(2026, 9, 10), 'start_date': datetime.date(2025, 10, 13)}, [507], {'end_date': datetime.date(2026, 7, 28), 'update_mode': 'UPDATE_DATE'}]]

I tried to parse it below:

    @classmethod
    def write(cls, records, values, *args):
        if 'planning_periods_on_details_pg' in values:
            cmd = values['planning_periods_on_details_pg'][0][0]
            logger.info(f'>>>>>>>>>>>>>>>>> CMD: {cmd}')
            if cmd == 'add':
                ids = values['planning_periods_on_details_pg'][0][1]
                logger.info(f'>>>>>>>>>>>>>>>>> IDS: {ids}')
                upd_info = values['planning_periods_on_details_pg'][1]
                upd_info = upd_info[1:]
                logger.info(f'>>>>>>>>>>>>>>>>> OPT: {upd_info}')
                n = len(upd_info)
                logger.info(f'>>>>>>>>>>>>>>>>> UPD INFO LENGTH: {n}')
                operation = values['planning_periods_on_details_pg'][1][0]
                logger.info(f'>>>>>>>>>>>>>>>>> OPT: {operation}')
                if operation == 'write':
                    for i in range(n):
                        info = upd_info[i]
                        logger.info(f'>>>>>>>>>>>>>>>>> INFO: {info}')

I know I am doing a wrong thing in-order to parse the received data.

Anybody knows how to parse the data in python ORM way? any link to a sample code?

Bromo