Adds MorphToOne relation to Laravel eloquent

📣 Shoutout to Ankur Kumar who wrote the original code for this relation in their package Eloquent Relations. I created this package as I needed to make a few tweaks to suit my needs. 🙌

Installation

You can install the package via composer:

composer require fidum/laravel-eloquent-morph-to-one

Usage

The MorphToOne relation is uses Laravel's MorphToMany under the hood. However, the difference is that it returns one model instead of a Collection of models.

If there is no related model in the database it will return null where MorphToMany would return an empty Collection.

Example:

<?php

namespace App;

use Fidum\EloquentMorphToOne\HasMorphToOne;
use Fidum\EloquentMorphToOne\MorphToOne;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\MorphToMany;

class Post extends Model
{
    use HasMorphToOne;

    public function featuredImage(): MorphToOne
    {
        return $this->morphToOne(Image::class, 'imageable')
            ->wherePivot('featured', 1);
            //->withDefault();
    }
    
    public function images(): MorphToMany
    {
        return $this->morphToMany(Image::class, 'imageable')
            ->withPivot('featured');
    }

}

<?php

namespace App;

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

class Image extends Model
{
    public function posts(): MorphToMany
    {
        return $this->morphedByMany(Post::class, 'imageable');
    }

    public function videos(): MorphToMany
    {
        return $this->morphedByMany(Video::class, 'imageable');
    }
}

Now you can access the relationship like:

<?php

// eager loading
$post = Post::with('featuredImage')->first();
dump($post->featuredImage);
// lazy loading
$post->load('featuredImage');

Prefer using sync instead of save when updating your relation.

$post->featuredImage()->sync([Image::find(123)]);
$post->featuredImage()->sync([Image::find(456)]);
$post->images->count(); // 1 row :)

❌ DO NOT use save it will follow morphToMany behaviour and create rather than update existing.

$post->featuredImage()->save(Image::find(123));
$post->featuredImage()->save(Image::find(456));
$post->images->count(); // 2 rows :(

Testing

composer test

Changelog

Please see CHANGELOG for more information on what has changed recently.

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email fidum.dev@gmail.com instead of using the issue tracker.

Credits

• Daniel Mason
• All Contributors

License

The MIT License (MIT). Please see License File for more information.