Hi, i'm testing and i write this code:

Function read_group is the key!

# -*- coding: utf-8 -*-
import logging, re

from odoo import api, fields, models
from odoo.exceptions import UserError
from odoo.osv.expression import expression
from pprint import pformat

_logger = logging.getLogger(__name__)


class SaleReport(models.Model):
    _inherit = "sale.report"

    # @api.depends('partner_id')
    def _compute_objetivo_zona(self):
        for rec in self:
            _logger.warning("sadjhasjkdasjdkjjjkjhkjhk")
            _logger.warning(rec.partner_id.x_zonas.x_studio_objetivos)

            objetivo_zona = 0.0
            partner = rec.partner_id
            zone_id = partner.x_zonas

            if zone_id:
                objetivo_zona = zone_id.x_studio_objetivos

            _logger.warning(objetivo_zona)
            _logger.warning("sadjhasjkdasjdkjjjkjhkjhk")

            rec.update({
                'objetivo_zona': 5.0
            })

    zone_id = fields.Many2one('x_zonas', 'Zonas', readonly=True)
    objetivo_zona = fields.Float('Objetivo', default=0.0, readonly=True)

    def _select(self):
        return super(SaleReport, self)._select() + ", zone.x_studio_objetivos as objetivo_zona"

    @api.model
    def read_group(self, domain, fields, groupby, offset=0, limit=None, orderby=False, lazy=True):
        _logger.warning("HACK ESCONDER CAMPO")
        _logger.warning(pformat(fields))
        has_field_objetivo = False
        newfields = []

        # Buscar campos objetivos para no molestar en suma
        for field in fields:
            if field != 'objetivo_zona:sum':
                newfields.append(field)
            else:
                has_field_objetivo = True

        res = super(SaleReport, self).read_group(domain, newfields, groupby, offset=offset, limit=limit,
                                                 orderby=orderby,
                                                 lazy=lazy)

        _logger.warning("RES ANTES")
        _logger.warning(res)

        if has_field_objetivo:
            zones = {}
            zone_total = 0

            # Procesar Campos
            for dato in res:
                _logger.warning("DATO INDIVIDUAL")
                _logger.warning(pformat(dato))

                if 'zone_id' in dato:
                    if dato['zone_id']:
                        zone_id = dato['zone_id'][0]

                        if zone_id in zones:
                            zone = zones[zone_id]
                            dato['objetivo_zona'] = 0
                        else:
                            zone = self.env['x_zonas'].search([('id', '=', dato['zone_id'][0])])
                            zones[zone_id] = zone
                            if zone:
                                dato['objetivo_zona'] = zone.x_studio_objetivos

                        if zone:
                            zone_total += zone.x_studio_objetivos

            _logger.warning(zone_total)

        _logger.warning("RES FINAL")
        _logger.warning(res)

        return res

    def _query(self, with_clause='', fields={}, groupby='', from_clause=''):
        fields['zone_id'] = ", partner.x_studio_zona as zone_id"
        fields['objetivo_zona'] = ", zone.x_studio_objetivos as objetivo_zona"
        #
        from_clause = 'left join x_zonas zone on (partner.x_studio_zona = x_zonas.id)'

        groupby += ', partner.x_studio_zona'
        return super(SaleReport, self)._query(with_clause, fields, groupby, from_clause)

Anyone suggest an odoo addon that report sale summary. for example, there are dozens sale orders, I want to get the summary list of sale products among these orders, then I can get the total qty of each product.