{!! Form::model($user, ['route'=> ['detach.buildings', $user->id], 'method'=>'PUT', 'class'=> 'form-horizontal needs-validation', 'novalidate'=>'' ]) !!}
<div class="modal fade" id="detachbuilding-{{$user->id}}" tabindex="-1" role="dialog" aria-hidden="true">
  <div class="modal-dialog modal-lg modal-dialog-centered">
    <div class="modal-content">
      <div class="modal-header bg-green">
        <h3 class="modal-title">Συσχέτιση με Κτήρια</h3>
        <button type="button" class="close" data-dismiss="modal" aria-label="Close">
          <span aria-hidden="true">&times;</span>
        </button>
      </div> <!-- End Modal Header -->
      <div class="modal-body">
        <div class="row justify-content-center">
          <div class="col-4 ">
            <div class="icon text-center">
              <i class="fas fa-warehouse text-green" style="font-size:50px; text-center;"></i>
            </div>
          </div>
        </div>
        <div class="modal-body">
          <div class="form-group row">
            <div class="col-sm-2 col-form-label">
              <label for="validationUserName">Κτήρια *</label>
            </div>
            <div class="col-sm-10">
               <select class="buildings form-control" name="building_id[]" multiple="multiple" id="edit_building_id-{{$user->id}}" style="width: 100%" > <!-- required -->
                  @foreach ($buildings as $building)
                  <option value="{{$building->id}}" {{ old('building_id', $user->building_id) == $user->building_id ? 'selected' : '' }}>{{ $building->BuildingName }}</option>
                  @endforeach
                </select>
              <div class="invalid-feedback">
                Παρακαλώ συμπληρώστε την επιλογή Κτηρίου
              </div>
            </div>
          </div>
        </div>
      </div> <!-- End Modal Body -->
      <div class="modal-footer">
        <div class="col-xs-6"><button type="button" class="btn btn-success" data-dismiss="modal">Ακύρωση</button></div>
        <div class="col-xs-6"><input type="submit" value="Αποθήκευση" class="btn btn-danger" id="confirm"></div>
      </div> <!-- End Modal Footer -->
    </div> <!-- End Modal Content -->
  </div> <!-- End Modal Dialog -->
</div> <!-- End Modal -->
{!! Form::close() !!}
<script type="text/javascript">
   $(function (){
      $('#edit_building_id-{{$user->id}}').select2({
         theme: "classic",
         width: 'resolve'
      });
      $('#edit_building_id-{{$user->id}}').select2().val( {!! json_encode($user->buildings()->pluck('building_id')) !!} ).trigger('change');
   });
 </script>