Cách chèn bản ghi vào mối quan hệ đa hình trong laravel với các ví dụ

/*
|==============================================================
| Inserting Records in Poly Morphic Relationships
|==============================================================
*/

// METHOD-1
$comment = new App\Comment(['body' => $request->body]);
$post    = App\Post::find($post->id);
$comment = $post->comments()->save($comment);


// METHOD-2
Auth::user()->comments()->create([
  'body'             => $request->body,
  'commentable_id'   => $post->id,
  'commentable_type' => get_class($post)
]);



// METHOD-3
$user->comments()->create([
  'body' => $request->body,
]);

NOTE:
You dont even have to insert commentable_id and commentable_type. 
it will be passed automatically. you can just: