Retrieving all morphedByMany relations in Laravel Eloquent

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In the Laravel documentation, there is the following example for retrieving morphedByMany relations, which are many-to-many polymorphic relations.

Laravel Many to Many polymorphic relations documentation

namespace App;

use Illuminate\Database\Eloquent\Model;

class Tag extends Model
{
    /**
     * Get all of the posts that are assigned this tag.
    */
    public function posts()
    {
        return $this->morphedByMany('App\Post', 'taggable');
    }

    /**
     * Get all of the videos that are assigned this tag.
     */
    public function videos()
    {
        return $this->morphedByMany('App\Video', 'taggable');
    }
}

How would I get a list of all morphed relations in one query / collection, for instance, posts and videos, and then if I later added photos (or anything), that too?

eloquent laravel polymorphism php
3 Answers

I use a trick here:

Create a Model Taggable for your connection table taggable and add a hasMany relation to the Tag model.

public function related()
{
    return $this->hasMany(Taggable::class);
}

Within your Taggable model create a morphedTo relation.

public function taggables()
{
    return $this->morphTo();
}

Now you can get all models which are using the tag by calling:

$tagged = Tag::with('related.taggables');
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