未定义属性：Illuminate \ Database \ Eloquent \ Relations \ MorphMany :: $ title

Sorry for bad English at first ) I'm new to laravel5 and trying to use polymorphic relations

here is the code

class Post extends Model
{


    public function seo()
    {
        return $this->MorphMany('App\Seo' , 'seoable');
    }

}


class Seo extends Model
{
    public function seoble()
    {
        return $this->morphTo();
    }
}

and in the view I try to retrieve post seo data like this

$post->seo()->title;

here is my DB

Schema::create('seos', function (Blueprint $table) {
        $table->increments('id');
        $table->string('title');
        $table->text('keywords');
        $table->text('description');
        $table->string('og_type');
        $table->string('og_title');
        $table->text('og_description');
        $table->integer('seoable_id');
        $table->string('seoable_type');
        $table->timestamps();
    });

but I got the error

Undefined property: 
Illuminate\Database\Eloquent\Relations\MorphMany::$title (View: /Applications/MAMP/htdocs/lblog/resources/views/posts/form.blade.php)

Try this: $post->seo->first()->title; or $post->seo()->get()->first()->title;

the reason why it doesn't work because the the seo() function until now is just a query, you need to execute that query like above