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pythonpython2.7odooodoo10
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Fazryan Fareka Riznendi

Hiii,

I am a beginner in python programming, how do you calculate the value of the one2many field? I have tried various kinds of references but still not resolved.

this is my code:

    parking_log_ids=fields.One2many('parking_log','parking_log_id',string='Log Parkir', ondelete='cascade')


class ParkingLog(models.Model):
    _name='parking_log'
    _rec_name='vehicle_id'
    

    vehicle_id=fields.Many2one('vehicle',string='Nomor Kendaraan')
    vehicle_type_id=fields.Char(string='Jenis Kendaraan', related='vehicle_id.vehicle_type.name')
    start_time=fields.Datetime(string='Masuk', default=fields.Datetime.now, required='True', readonly='True')
    end_time=fields.Datetime(string='Keluar' ,states={'in' : [('readonly', 'True')], 'paid' : [('readonly', 'True')]})
    rate_id=fields.Integer('Tarif / Jam', related='vehicle_id.vehicle_type.billing')

the value will always be updated as the value in the one2many field increases

and this is an image that shows the value that I will total (but in the picture the value is still 0) :
https://drive.google.com/file/d/1ecUEU9-UvyJcUdnzaXD5sHw7KrVkhZEq/view?usp=sharing

thank you in advance :D

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Yenthe Van Ginneken (Mainframe Monkey)
Best Answer

Hi Fazryan,

Why don't you make a field that is computed and which counts the amount of records you have on the one2many field?

total_blaya_parkir = fields.Integer("Total blaya parkir", compute="_compute_blaya_total")

@api.multi
def _compute_blaya_total(self):
    self.total_blaya_parkir = len(self.parking_log_ids)

The result will be the total of lines that are set on the parking_log_ids field.

Regards,
Yenthe

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Fazryan Fareka Riznendi
Author

Hai Yenthe.

if that's what I input, in the field of one2many. I can't 'add items'

Fazryan Fareka Riznendi
Author

and the plan for the one2many field will be related to another field of type monetary float + widget (say field B), and the value will always be updated as the value in the one2many field increases

Fazryan Fareka Riznendi
Author

errata, Yenthe Your code can be implemented without error. but how do you calculate the total value in that field? because now it only counts the number of fields, not the number of values, thank you

Fazryan Fareka Riznendi
Author

cause float/int cant use len()

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