laravel中的搜索引擎无法正常工作+功能

so this is my controller :

        class PostsController extends BaseController
    {
        public function postSearch()
        {
        $q = Input::get('username');

        $posts = DB::table('users')->whereRaw(
            "MATCH(username) AGAINST(? IN BOOLEAN MODE)",
            array($q)
        )->get();

        return View::make('posts.index', compact('posts'));

    }


}

and my route :

Route::get('posts/index', function()
{
    return View::make('posts/index');
});


Route::post(
    ''posts/index',
    array(
        'as' => 'posts.index',
        'uses' => 'PostsController@postSearch'
    )


);

and my html :

<div class="search">
    {{ Form::model(null, array('route' => array('posts.index'))) }}
    {{ Form::text('username', null, array( 'placeholder' => 'Search query...' )) }}
    {{ Form::submit('Search') }}
    {{ Form::close() }}


</div>

the problem is it give me error :

MethodNotAllowedHttpException

so i wasnt for users to be able to search in the index page and give them the result in the diffident page in a table how can i make the result appear and what is this error ?

You are doing everything fine,but in route file your class is named as PostsController but the actual controller class name is postController this is why it says PostsController not found.

Route:

Route::get('posts/index', function()
{
    return View::make('posts/index');
});

Route::post('posts/index', array('as' => 'posts.index','uses' => 'PostsController@postSearch'));

Controller

class PostsController extends BaseController
{
    public function postSearch()
    {
        $q = Input::get('username');

        $posts = DB::table('users')->whereRaw(
            "MATCH(username) AGAINST(? IN BOOLEAN MODE)",
            array($q)
        )->get();

        return View::make('posts.index', compact('posts'));

    }
}

View

<div class="search">
    {{ Form::open(array('route' => 'post.index', 'method' => 'POST', 'role' => 'search')) }}
    {{ Form::text('username',null, array( 'placeholder' => 'Search query...' )) }}
    {{ Form::submit('Search') }}
    {{ Form::close() }}
</div>

@if(isset($posts))

@foreach($posts as $post)

{{$post->id}}

@endforeach

@endif