Odoo - one2many sum

Question

我正在做简单的项目，我遇到了问题。我想在我的one2many领域总结一列我怎么能做到这一点？

from openerp import models, fields, api, _ 


class Fam(models.Model): 
    _name = 'fam' 

    fm_id = fields.Many2one('fam') 
    mileage = fields.Float(string="Mileage", required=True) 
    fueled = fields.Float(string="Fueled", required=True) 
    perliter = fields.Float(string='Price per liter', required=True) 


class Car2(models.Model): 
    _name = 'car2' 
    _description = 'Car record' 
    _log_access = True 

    name = fields.Char(
     string='Name', 
     required=True 
    ) 
    mile = fields.One2many(
     "fam", 
     "fm_id", 
     string='Mileage, Fuel and cost perliter', 
     required=True 
    ) 
    average = fields.Float(
     string='Average' 
    ) 
    combustion = fields.Float(
     string='Combustion' 
    ) 

Answer 1

你可以用下面的例子实现：

for line in self.one2many_field_name: 
    total += line.field_name_in_one2many_table 

# in your case 
total_mileage = 0.0 
total_fueled = 0.0 
total_perliter = 0.0 
for line in self.mile: 
    total_mileage += line.mileage 
    total_fueled += line.fueled 
    total_perliter += line.perliter