How to set Dropdown list value in form model binding in L4.2

did you specify a name="" attribute on the dropdown list? So it looks kind of like this:

<select id="dropdown" name="dropdown">
    <option value="0">Displayname</option>
</select>

@deadlockgB my form like this

@extends('layouts.master')

@section('content')

   <h1 class="profile-edit">Edit your profile</h1>
   <div class="row">
     @include('layouts.partials.errors')
     {{  Form::model($user->profile, ['method' => 'PATCH', 'route' => ['profile.update', $user->username] ,'files' =>true]) }}
                <div class="col-md-4">

                   
                  @include('profile.partials.about-form')
               

                  </div>

                 <div class="col-md-3">

                  @include('profile.partials.address-form')
                   {{ Form::submit('Update Profile', ['class' => 'btn btn-primary']) }}
                 </div>
                 <div class="col-md-5">
                   @include('profile.partials.image')
                 </div>
              
                  
      {{ Form::close() }}

    </div>
@stop

and @include('profile.partials.about-form')

   <div class="form-group">
                     <lable for="storename">Shop Name:</lable>
                     {{ Form::text('storename', null, ['class' => 'form-control']) }}
                 </div>
                  
                 <div class="form-group">
                     <lable for="category">Select your shop category:</lable>
                     <select name="category_id" id="category" class="form-control" >
                      <option value="-1">Select category</option>
                      @foreach($categories as $category )
                      <option value="{{ $category->id }}">{{ $category->name }}</option>
                       @endforeach
                    </select> 
                     
                 </div>

                 <div class="form-group">
                     <lable for="subcategory_id">Select your shop subcategory:</lable>
                     <select name="subcategory_id" id="subcategory" class="form-control">
                    
                     <option value="-1">Select subcategory</option>
                      <option value=""></option>
                    
                    </select> 
                     
                 </div>

to use model binding you need to use blade, the key-value needs to be an array as the second parameter

//View
 <div class="field">
    {{Form::label('auction_date_id','Preferred Auction Date')}}
    {{Form::select('auction_date_id',$auctiondates)}}
</div>

//Controller
  $getAuctionDates = AuctionDate::lists('auction_date_time','id');
return View::make(edit.view)->with('auctiondates',$getAuctionDates);

all it wants is that array. Also your field names must be the same as the Schema names you are passing it.

@Penderis but i have two dropdown list where subcategory dependent on first when i try like this

<div class="form-group">
                     <lable for="subcategory_id">Select your shop subcategory:</lable>
                     {{ Form::select('subcategory_id', null, ['class' => 'form-control' ,'id' => 'subcategory']) }}
                                                                         
            </div>

I got error

Invalid argument supplied for foreach()

first dropdown list working fine and its value store in model method but what about second

I do not see that you would have a problem if you ensure that both follow the same pattern, query DB->if possible two separate queries if need be so you can receive your values as an array via the lists method (Category::lists('value','key')) straight from the queries then if you did it as seperate you will

//Do not be scared to use multiple with statements to make what you are doing more clear.
View::make('page')->with('categories',$categories)->with('subcategories',$subcategories)

As for the foreach error I think it is because of the null which should be the array pair of key-value. Unfortunately do not have my server running to test any code.

@Penderis I'm using ajax method for dependent dropdown list like this

$('#category').change(function()
{
    $.get('/categories/' + this.value + '/subcategory.json', function(states)
    {
        var $subcategory = $('#subcategory');

        $subcategory.find('option').remove().end();

        $.each(states, function(index, subcategory) {
            $subcategory.append('<option value="' + subcategory.id + '">' + subcategory.name + '</option>');
        });
    });
})

and in my route

Route:: get('categories/{code}/subcategory.json', function($code)
{
    return Subcategory::where('category_id', $code)->get();
});

????

@Penderis thanks my problem is solved