way-data save multiple options of select

Dear, as I can be stored in the "way-data" a set of elements? I need to store in a select multiple options.???

generates the following structure:

way data

{ "requestFoundsTransports": { "transports": [ { "transport_participants": { "[]": "20" }, "transport_ammount": "1212", "transport_details": "1ssssss" } ] } }

and I need something like this:

way data

{ "requestFoundsTransports": { "transports": [ { "transport_participants": { "[]": "20,21,23" }, "transport_ammount": "1212", "transport_details": "1ssssss" } ] } }

or this way:

way data

{ "requestFoundsTransports": { "transports": [ { "transport_participants": { "[0]": "20", "[1]": "21", "[2]": "22" ....... }, "transport_ammount": "1212", "transport_details": "1ssssss" } ] } }

greeeeetings !!!!

HTML is:

            <div class="tab-pane" id="transport">
                <h3>Transporte<a class="btn btn-small btn-default add-remove-transport" style="margin-left:5%; margin-top: 0%;"  way-action-push="requestFoundsTransports.transports"><i class="fa fa-plus"></i></a></h3>
                <div class="row" style="margin-top:0%;">
                    <div class="span2" style="margin-left:3%;"> 
                        {{ Form::label('transport_ammount','Monto') }}
                    </div>
                    <div class="span2" style="margin-left:3%;"> 
                        {{ Form::label('transport_participants','Participantes') }}
                    </div>                      
                    <div class="span7" style="margin-left:3%;"> 
                        {{ Form::label('transport_details','Detalles') }}
                    </div>
                    <div class="span1" style="margin-left:3%;"> 
                        {{ Form::label('remove','Quitar') }}
                    </div>
                </div>                      
                <div class="row" style="margin-top:0%;" way-repeat="requestFoundsTransports.transports">                    
                    <div class="span2" style="margin-left:3%;"> 
                        {{ Form::text('transport_ammount[$$key]', 0,array('class'=>'span2 sum-real-time', 'placeholder'=>'ej: 15260', 'way-data' => 'transport_ammount')) }}
                    </div>
                    <div class="span2" style="margin-left:3%;">
                        {{ Form::select('transport_participants[$$key][]', $usersServices_select2, Auth::user()->id, array('class'=>'form-control span2', 'multiple', 'data-placeholder'=>'--seleccione--', 'way-data'=>'transport_participants')) }}   
                    </div>
                    <div class="span7" style="margin-left:3%;"> 
                        {{ Form::textarea('transport_details[$$key]','',array('rows'=>2, 'class'=>'span7 transport-details', 'way-data'=>'transport_details')) }}
                    </div>
                    <div class="span1" style="margin-left:3%;margin-top:0%; width:5%;">
                        <a class="btn btn-small btn-default recalcule-sum add-remove-transport" way-action-remove="requestFoundsTransports.transports.$$key"><i class="fa fa-times"></i></a>
                    </div>  
                </div>
                <div class="row"  style="margin-top:0%;">
                    <div class="span7" style="margin-left:3%;">
                        <h4>way data</h4>
                        <pre way-data="__all__" way-json="true" way-default="{}"></pre>
                        <button class="btn btn-danger" way-clear way-persistent="true">Clear data</button>
                    </div>
                </div>
            </div>

gwendall / way.js

way-data save multiple options of select #69