title
description
seoble_id
seoble_type
timestamps

namespace AppModels;

class Post extends Eloquent {
  public function seo()
  {
    return $this->morphOne('AppModelsSeo', 'seoble');
  }
}

title
description
object_id
type
timestamps

namespace AppModels;

class Post extends Eloquent {
  public function seo()
  {
    return $this->hasOne('AppModelsSeo', 'object_id')->where('type', 'post');
  }
}

namespace AppModels;

class Seo extends Eloquent {

    public function seoable()
        {
           return $this->morphTo();
        }

    public function post()
    {
        return $this->belongsTo('AppModelsSeo', 'seoable_id');
    }
}

/*----*/

namespace AppModels;

class Post extends Eloquent {

    public function getSeo($type)
    {
        return $this->morphOne('AppModelsSeo', 'seoable');
    }
}


// you can using like this :
$seo = Seo::where('seoable_type', 'post');
$seo->post->first();

// or like this :
$post = Post::with('getSeo')->findOrFail($id)->toArray();