# -*- coding:utf-8 -*- from openerp import fields, models, api class ResPartner(models.Model): _inherit="res.partner" def _activity_count(self): for partner in self: partner.activity_count = self.env['crm.task'].search_count([('partner_id', '=', partner.id),('state','=','pending')]) task_ids = fields.One2many('crm.task', 'partner_id','Actividades') activity_count = fields.Integer(compute="_activity_count", string="Actividades", store=False)