We have write one method to send daily task notification email on my custom module, that we need to call via ir.cron . When cron run automatically it works fine but when I click on run manually button it gives strange error as "Comparing apples and oranges".here is the steps.
I write following methods for cron job.

Put this method in cron job and when cron run it works perfectly and send daily emails to the users.
But when I click on Run Manually button on ir.cron, it throws error.
Current behavior:
when I click on Run Manually button on ir.cron with above method, it throws following error.
Comparing apples and oranges: res.users(1,) == 1 (/home/browseinfo/workspace/v9/openerp/addons/base/ir/ir_model.py:783)2016-12-15 06:50:59,236 13934 INFO v9c_project_task_old_api openerp.sql_db: Programming error: can't adapt type 'res.users', in query SELECT MAX(CASE WHEN perm_read THEN 1 ELSE 0 END) FROM ir_model_access a JOIN ir_model m ON (m.id = a.model_id) JOIN res_groups_users_rel gu ON (gu.gid = a.group_id) WHERE m.model = %s AND gu.uid = %s AND a.active IS True2016-12-15 06:50:59,237 13934 ERROR v9c_project_task_old_api openerp.addons.base.ir.ir_cron: Call of self.pool.get('project.task').send_summery(cr, uid, *(False,)) failed in Job 6

@api.model    def send_summery(self):
        user_ids = []        review_ids = []        user_id = self.env['res.users']        template_id = self.env['ir.model.data'].get_object_reference(                                                  'v9c_custom_project',                                                  'email_template_send_summery')[1]        email_template_obj = self.env['mail.template'].browse(template_id)        if template_id:
            res_user_ids = user_id.browse(user_id.search([]))            for record in res_user_ids:
                email_to = ''                table = ''                search_task = self.search(['|',                                          ('user_id', '=', record.id),                                          ('reviewer_id', '=', record.id),                                          ])                                if search_task:
                    stage_id = self.env['project.task.type'].search([('name', '=', 'Done')])                    if stage_id:                         search_task1 = search_task.search([('date_deadline', '<', time.strftime('%Y-%m-%d')),                                              ('stage_id', '!=', stage_id[0].id)])                    table = "<table border='1'><tr><td>Task Name</td><td>deadline Date</td>"                                                for task in search_task1:
                        table += "<tr><td>" + str(task.name) +"</td><td>" + str(task.date_deadline) + "</td></tr>"                    table += "</tr></table>"                    email_to += str(record.login)                     if search_task:
                        values = email_template_obj.generate_email(self.id, fields=None)                        values['email_from'] = self.env['res.users'].sudo(1).browse(self._uid).partner_id.email                        values['email_to'] = email_to                        values['res_id'] = False                        values['body_html'] = table                        mail_mail_obj = self.env['mail.mail']                        msg_id = mail_mail_obj.sudo(1).create(values)                        if msg_id:
                            mail_mail_obj.send([msg_id])        return True