I am using laravel and i need to populate multiple select according to what user choose from a database.
I have 2 select box, one choose category, then once i choose the category, the second select box is populated with product.
Once the second select is populate with product i need to fetch from database all the description of that product and show in a form so it can be modified.

I did a Route:

 Route::get('api/dropdown', function(){

            $input =Input::get('option');



                $prodotti= DB::table('prod')                

                    ->join('cat','cat.id_prod','=','prod.id')

                    ->where('cat.id','=',$input)

                    ->select('prod.id as idprod','prod.nome as nomeprod')

                    ->lists('nomeprod','idprod');





            return Response::json($prodotti);

            });

This should send a response

{{ Form::open(array('url' => 'admin/create/mod', 'files'=> true)) }}

        <span>

        {{ Form::select('categorie',  $categorie,'default', array('id'=> 'a')) }}

            <br/>



        {{ Form::select('a',array('a'=> 'scegli'),'default', array('id'=> 'b')) }}



        Scegli il nome del prodotto



        {{Form::text('nome')}}

        <br/>

        {{Form::label('*Descrizione in Italiano')}}

        <br/>

        {{Form::textarea('descrizioneit','',array('id'=>'descrizioneit'))}}

        {{Form::textarea('descrizioneit','',array('id'=>'previewit', 'readonly'=>'readonly', 'onfocus'=>'this.blur();'))}}

        <br/>

        {{Form::label('*Descrizione in Inglese')}}

        <br/>

        {{Form::textarea('descrizioneen','',array('id'=>'descrizioneen'))}}

        {{Form::textarea('descrizioneen','',array('id'=>'previewen', 'readonly'=>'readonly', 'onfocus'=>'this.blur();'))}}

        <br/>



{{Form::close()}}

This is my javascript

jQuery(document).ready(function($){

    $('#a').change(function(){

            $.get({{ URL::to('api/dropdown')}}, 

                { option: $(this).val() }, 

                function(data) {

                    var model = $('#b');

                    model.empty();



                    $.each(data, function(element) {

                        model.html(element);

                    });

                });

        });

    });

Then i should do another api to populate the textbox with the product description i have chosen?

I would follow this idea but even the firt part of this doesn't work.
It seems that my javascript code is ignored.