records
        .where(
            :id => Call
                       .select(:call_group_id)
                       .joins(:user)
                       .where(
                           'users.name LIKE ? OR users.last_name LIKE ?',
                           "%#{name}%",
                           "%#{last_name}%"
                       )
                       .where(
                           '(`calls`.`created_at`, `call_group_id`) IN (?)',
                           Call
                               .select('MAX(`created_at`), `call_group_id`')
                               .group(:call_group_id)
                       )
        )