Hello All,

I have a One2many field and three fields inside the One2many field 'name','weight' and 'price'. I want that all values for 'weight' field added from multiple rows of One2many field.

My Python and XML Code is here:

Python Code:

class body_processing(models.Model):
    _name = 'body.processing'
     
     machine_weight_id = fields.One2many('machine.weight', 'machine_id', string='Weight         Machine')
class machine_weight(models.Model):
    _name = 'machine.weight'

    @api.depends('weight','sum', 'machine_id')
    def _onchange_amount_weight(self):
        sum = 0.0
        vals = 0.0
        for line in self.machine_id:
            vals = line.weight + line.sum
            print"a", vals
            line.sum = line.vals
            print"b", line.sum
            line.sum += line.weight
            print"c", line.sum

    machine_id = fields.Many2one('sale.pet', string='Machine Weight', ondelete='cascade', index=True,
                                copy=False)
    pet = fields.Char()
    weight = fields.Integer()
    price = fields.Integer()
    sum = fields.Integer('SUM', change_default = True, default= _onchange_amount_weight)

XML Code:

<group>
    <field name="machine_weight_id" style="width:630px">
        
        <tree editable="bottom">
            <field name="pet"/>
            <field name="weight"/>
            <field name="price"/>
            <field name="sum"/>
        </tree>
    </field>
</group>