laravel形式的问题

My Form:

{{ Form::open(['action' => array('UserMessageController@store', Route::input('user')), 'method' => 'post', 'files' => true]) }}
  <textarea name="text"></textarea><br>
  <input type="file" name="attachment" style="margin-bottom: 10px;"><br>
  <input type="submit">
{{ Form::close() }}

This function can't transmit argument Route::input('user') in the store method:

public function store($userId)
{
    $message = new Message;

    $message->text = Input::get('text');
    $message->user_id_from = Auth::id();
    $message->user_id_to = $userId;
    $message->save();

    require('MessageAttachmentController.php');
    MessageAttachmentController::store($message->id);

    return Redirect::to("contact/$userId/message/create");
}

maybe problem is in routes.php?

  Route::resource('contact', 'UserMessageController');
  Route::get('contact/{user}/message/create', 'UserMessageController@create');
  Route::post('contact/{user}/message/create', 'UserMessageController@store');

debug window:

this is the solution:

{{ Form::open(['url' => 'contact/'. Route::input('user') .'/message/create', 'method' => 'post', 'files' => true]) }}

//Form part

{!! Form::open(array('url' => 'contact/store/'.$userId,'method' => 'post','files' => 'true')) !!}

// Route part

Route::post('contact/store/{id}', 'UserMessageController@store');