I try to do it: 

I get an error that 'my_module' has no attribute 'cr'. I fixed it by replacing cr = self.env.cr and I continue to get other error : 'psycopg2.extensions.cursor' object has no attribute 'excute'. Please give me advice.

recipient_model_real = fields.Selection(selection='get_contact',required=True)@api.crdef get_contacts(self):    cr = self.cr    cr.excute("SELECT name FROM sms_mass_sms_contacts_sms_list where name!= NULL;")    result = cr.dictfetchall()    data = simplejson.load(result)    return data.item()