<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Notifications\Notifiable;
use Illuminate\Auth\Authenticatable;
use Illuminate\Auth\Passwords\CanResetPassword;
use Illuminate\Foundation\Auth\Access\Authorizable;
use Illuminate\Contracts\Auth\Authenticatable as AuthenticatableContract;
use Illuminate\Contracts\Auth\Access\Authorizable as AuthorizableContract;

class User extends Model implements
    AuthenticatableContract,
    AuthorizableContract
{
    use Authenticatable, Authorizable, CanResetPassword;
    use Notifiable;
}

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class Post extends Model
{
      /**
      * Get the publisher for this model.
      */
      public function publisher()
      {
          return $this->belongsTo(User::class, 'user_id', 'id');
      }
}

[
    score => '4',
    view_count  => '10-100',
    publisher => [
      age => '20-30',
      type => 'guest'
    ],
    created_at => '02/02/2018-04/02/2018'
]

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Post;

class PostController extends Controller
{

    public function index(Request $request)
    {
        $query = Post::where('score', $request->input('score'));

        if ($request->has('view_count'))
             $query->whereBetween('view_count', explode('-',$request->get('view_count')));

        if ($request->has('created_at'))
             $query->whereBetween('created_at', explode('-',$request->get('created_at')));

        // filter relation
        if ($request->has('publisher')){
            $query->whereHas('publisher', function ($q) use ($request)
            {
                $publisher = $request->get('publisher');
                if(!empty($publisher['age']))
                    $q->whereBetween('age', explode('-',$publisher['age']));
                if(!empty($publisher['type']))
                    $q->where('type', $publisher['type']);
                return $q;
            });
        }
        return $query->get();
    }

}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Post;

class PostController extends Controller
{

    public function index(Request $request)
    {
        return Post::filter()->get();
    }

}

use VelitSol\EloquentFilter\Filtrable;

class Post extends Model {
    use Filtrable;
}

<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Requests;
use App\Post;

class PostController extends Controller
{

    public function index(Request $request)
    {
        return Post::filter()->get();
    }

}