Implementing Laravel Eloquent Polymorphic One-to-Many Relationships

// In App\Models\Comment.php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\MorphTo;

class Comment extends Model
{
    protected $fillable = ['body'];

    /**
     * Get the parent model (post or video) that owns the comment.
     */
    public function commentable(): MorphTo
    {
        return $this->morphTo();
    }
}

// In App\Models\Post.php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\MorphMany;

class Post extends Model
{
    protected $fillable = ['title', 'body'];

    /**
     * Get all of the post's comments.
     */
    public function comments(): MorphMany
    {
        return $this->morphMany(Comment::class, 'commentable');
    }
}

// In App\Models\Video.php
namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\MorphMany;

class Video extends Model
{
    protected $fillable = ['title', 'url'];

    /**
     * Get all of the video's comments.
     */
    public function comments(): MorphMany
    {
        return $this->morphMany(Comment::class, 'commentable');
    }
}

// Usage example
use App\Models\Post;
use App\Models\Video;
use App\Models\Comment;

// Create a post and a video
$post = Post::create(['title' => 'My First Post', 'body' => 'Content of the post.']);
$video = Video::create(['title' => 'Laravel Tutorial', 'url' => 'https://example.com/video']);

// Add comments to the post
$post->comments()->create(['body' => 'Great post!']);
$post->comments()->create(['body' => 'Very informative.']);

// Add comments to the video
$video->comments()->create(['body' => 'Awesome video!']);
$video->comments()->create(['body' => 'Helped me a lot.']);

// Retrieve comments for the post
$postComments = $post->comments;
echo "Comments for Post '{$post->title}':
";
foreach ($postComments as $comment) {
    echo "- {$comment->body}
";
}

// Retrieve comments for the video
$videoComments = $video->comments;
echo "
Comments for Video '{$video->title}':
";
foreach ($videoComments as $comment) {
    echo "- {$comment->body}
";
}

// Retrieve a comment and its parent
$firstComment = Comment::first();
if ($firstComment) {
    echo "
First comment body: {$firstComment->body}
";
    echo "It belongs to type: " . $firstComment->commentable_type . " with ID: " . $firstComment->commentable_id . "
";
    echo "Parent Title: " . $firstComment->commentable->title . "
";
}

// Database migration structure (example for 'comments' table)
// Schema::create('comments', function (Blueprint $table) {
//     $table->id();
//     $table->text('body');
//     $table->morphs('commentable'); // Adds commentable_id (INT) and commentable_type (VARCHAR)
//     $table->timestamps();
// });