Nested Model Relations for CodeIgniter 4

Nested Model Relations for CodeIgniter 4 - Printable Version

+- CodeIgniter Forums (https://forum.codeigniter.com)
+-- Forum: CodeIgniter 4 (https://forum.codeigniter.com/forumdisplay.php?fid=28)
+--- Forum: CodeIgniter 4 Addins (https://forum.codeigniter.com/forumdisplay.php?fid=34)
+--- Thread: Nested Model Relations for CodeIgniter 4 (/showthread.php?tid=92250)

Nested Model Relations for CodeIgniter 4 - michalsn - 12-31-2024

This library simplifies managing model relationships (e.g., parent-child or related entities) in CodeIgniter 4. It extends the base model functionality, making it easier to define and work with nested relations. It supports eager and lazy loading.

GitHub Repository: codeigniter-nested-model

Installation:

Code:
composer require michalsn/codeigniter-nested-model

Example Usage:
Initialize nad define relations.

PHP Code:
use Michalsn\CodeIgniterNestedModel\Relation;
use Michalsn\CodeIgniterNestedModel\Traits\HasRelations;

class PostModel extends Model
{
    use HasRelations;

    // ...

    protected function initialize()
    {
        $this->initRelations();
    }

    public function author(): Relation
    {
        return $this->hasOne(UserModel::class);
    }
} 

Use in action:

PHP Code:
use App\Models\PostModel;

$postModel = model(PostModel::class);

// Retrieve a post with its author relation
$post = $postModel->with('author')->find(1);

// Access the related author data
echo $post->author->name; 

The best part is that it uses the same models you normally create, so you can take full advantage of this fact.

Docs:
https://michalsn.github.io/codeigniter-nested-model/

RE: Nested Model Relations for CodeIgniter 4 - foxbille - 03-06-2025

Hello,
Have tried it, but get a Call to undefined method App\Models\PraticienModel::initRelations exception.
Can't find out why.
Eric

RE: Nested Model Relations for CodeIgniter 4 - michalsn - 03-06-2025

You probably forgot to add the HasRelations trait to your model.

RE: Nested Model Relations for CodeIgniter 4 - foxbille - 03-06-2025

no...
Have followed instructions scrupulously
Started a fresh CI4 installation with composer create-project
Then added codeigniter-nested-model
checked everything i could (Model, Entity, controller, route)
Then deleted folder and made it twice again
Tried to add full path to HasRelation :
use Michalsn\CodeIgniterNestedModel\Traits\HasRelation;
Nothing could fix the problem

RE: Nested Model Relations for CodeIgniter 4 - michalsn - 03-06-2025

The trait's name is plural - HasRelations (with an "s" at the end).

RE: Nested Model Relations for CodeIgniter 4 - foxbille - 03-11-2025

I know, it's a typo in my post, script is fine.

RE: Nested Model Relations for CodeIgniter 4 - foxbille - 03-13-2025

got it!
use \Michalsn\CodeIgniterNestedModel\Traits\HasRelations;
was outside model class definition Sad

now i get :
Method "specialite()" returned an incorrect type. ("App\Models\Relation" instead of "Michalsn\CodeIgniterNestedModel\Relation")
What am I doing wrong?

RE: Nested Model Relations for CodeIgniter 4 - michalsn - 03-13-2025

You need to import the Relation class:

PHP Code:
use Michalsn\CodeIgniterNestedModel\Relation; 

I updated the docs - now examples have full imports of necessary classes, to prevent these types of confusion.

https://michalsn.github.io/codeigniter-nested-model/basic_usage/