morph relation laravel

1You may register the morphMap in the boot function of your 
2App\Providers\AppServiceProvider class or create a separate service provider 
3if you wish.
4
5use Illuminate\Database\Eloquent\Relations\Relation;
6
7Relation::morphMap([
8    'post' => 'App\Models\Post',
9    'video' => 'App\Models\Video',
10]);

1posts
2    id - integer
3    title - string
4    body - text
5
6videos
7    id - integer
8    title - string
9    url - string
10
11comments
12    id - integer
13    body - text
14    commentable_id - integer
15    commentable_type - string

1<?php
2
3namespace App\Models;
4
5use Illuminate\Database\Eloquent\Model;
6
7class Comment extends Model
8{
9    /**
10     * Get the parent commentable model (post or video).
11     */
12    public function commentable()
13    {
14        return $this->morphTo();
15    }
16}
17
18class Post extends Model
19{
20    /**
21     * Get all of the post's comments.
22     */
23    public function comments()
24    {
25        return $this->morphMany(Comment::class, 'commentable');
26    }
27}
28
29class Video extends Model
30{
31    /**
32     * Get all of the video's comments.
33     */
34    public function comments()
35    {
36        return $this->morphMany(Comment::class, 'commentable');
37    }
38}