CODEWITHSUNDEEP
laraveleloquent
Sudeesh Rajeevan
Sudeesh Rajeevan

Reputation: 3

How to transform eloquent relation object?

We have following models -

Post

----------------------------------------------
| id | title | text | creator | status | etc |
----------------------------------------------
|    |       |      |         |        |     |
----------------------------------------------

creator -> belongsTo User

group -> belongsTo group

User

posts -> hasMany Posts

avatar -> hasOne Media

Media

user -> belongsTo User

Group

post - belongsTo Post

When I fetch posts using eloquent I can use transform function to transform post attributes but unable to transform relations in the Post collections.

$posts = Post::where('status', 'active')
            ->with(['creator.avatar','group'])
            ->get();

$posts->transform(function($post) {
    $post->title = 'Transformed'; // works
    $post->creator->avatar = ['path'=>'/avatar/','file_name'=>'a.png']; // does not work
});

Upvotes: 0

Views: 2294

Answers (1)

Jack Robertson
Jack Robertson

Reputation: 383

When you call $post->creator, you're essentially calling $post->getRelation('creator') via a "magic method".

This is important because it means that you're setting a property on the object returned by the getRelation method, you are not updating the creator relationship by reference - so when you call getRelation('creator') again, the original relationship value is returned.

Therefore, to achieve what you want to accomplish, you need to overwrite the creator relation value:

$posts->transform(function ($post) {
    $post->title = 'Transformed';

    $creator = $post->creator;

    $creator->avatar = [
        'path' => '/avatar/',
        'file_name' => 'a.png'
    ];

    $post->setRelation('creator', $creator); // or $post->creator = $creator;
});

Upvotes: 6

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