Update To `relationLoaded()` Causes Problems When Accessing Attributes On A Model Containing A Period

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Introduction

In Laravel 12.10.0, a change was introduced in the relationLoaded() method to handle nested relationships in models. However, this update has caused problems when attempting to access attributes on a model that contain a period (.). In this article, we will explore the issue, its causes, and possible solutions.

Problem Description

The problem arises when trying to access attributes on a model that contain a period. For example, if you have a model named User with an attribute first_name, accessing it using $user->first_name will result in an error. This is because the relationLoaded() method is called, which was updated to handle nested relationships in the PR #55471.

Causes of the Problem

The problem is caused by the update to the relationLoaded() method in the PR #55471. This method is responsible for checking if a relationship is loaded on a model. However, in the updated method, the . character is treated as a nested relationship, which causes the problem.

Steps to Reproduce

To reproduce the problem, you can follow these steps:

  1. Create a new Laravel project using the command composer create-project --prefer-dist laravel/laravel project-name.
  2. In the app/Models directory, create a new model named User.php with the following code:
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    protected $fillable = ['first_name', 'last_name'];
}
  1. In the app/Http/Controllers directory, create a new controller named UserController.php with the following code:
namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;

class UserController extends Controller
{
    public function show(User $user)
    {
        return $user->first_name;
    }
}
  1. Run the command php artisan serve to start the development server.
  2. Open a web browser and navigate to http://localhost:8000/user/1. This should result in an error.

Related Test Failure

A related test failure can be found in the following link: https://github.com/filamentphp/filament/actions/runs/14589554182/job/40966543141.

Solution

To solve the problem, you can use the following workarounds:

  1. Use a different attribute name: Instead of using an attribute name with a period, use a different name without a period.
  2. Use the attribute method: You can use the attribute method to access the attribute value. For example, $user->getAttribute('first_name').
  3. Update the relationLoaded() method: You can update the relationLoaded() method to exclude the . character as a nested relationship.

Conclusion

In conclusion, the update to the relationLoaded() method in Laravel 12.10.0 has caused problems when accessing attributes on a model that contain a period. This problem can be solved by using workarounds such as using a different attribute name, using the attribute method, updating the relationLoaded() method.

Update to relationLoaded() Method

To update the relationLoaded() method, you can use the following code:

namespace Illuminate\Database\Eloquent;

use Illuminate\Database\Eloquent\Model;

trait HasAttributes
{
    // ...

    public function relationLoaded($relation)
    {
        // ...

        if (strpos($relation, '.') !== false) {
            // Exclude the '.' character as a nested relationship
            return false;
        }

        // ...
    }
}

This update will exclude the . character as a nested relationship, solving the problem.

Commit Message

The commit message for this update should be:

Update relationLoaded() method to exclude '.' character as a nested relationship

This commit message clearly describes the update made to the relationLoaded() method.

API Documentation

The API documentation for this update should include the following information:

  • Method: relationLoaded()
  • Description: Updates the relationLoaded() method to exclude the . character as a nested relationship.
  • Parameters: $relation
  • Returns: bool

Introduction

In our previous article, we discussed the issue caused by the update to the relationLoaded() method in Laravel 12.10.0. This update has caused problems when attempting to access attributes on a model that contain a period (.). In this article, we will answer some frequently asked questions related to this issue.

Q: What is the cause of the problem?

A: The problem is caused by the update to the relationLoaded() method in the PR #55471. This method is responsible for checking if a relationship is loaded on a model. However, in the updated method, the . character is treated as a nested relationship, which causes the problem.

Q: How can I reproduce the problem?

A: To reproduce the problem, you can follow these steps:

  1. Create a new Laravel project using the command composer create-project --prefer-dist laravel/laravel project-name.
  2. In the app/Models directory, create a new model named User.php with the following code:
namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class User extends Model
{
    protected $fillable = ['first_name', 'last_name'];
}
  1. In the app/Http/Controllers directory, create a new controller named UserController.php with the following code:
namespace App\Http\Controllers;

use App\Models\User;
use Illuminate\Http\Request;

class UserController extends Controller
{
    public function show(User $user)
    {
        return $user->first_name;
    }
}
  1. Run the command php artisan serve to start the development server.
  2. Open a web browser and navigate to http://localhost:8000/user/1. This should result in an error.

Q: What are the possible solutions to the problem?

A: There are several possible solutions to the problem:

  1. Use a different attribute name: Instead of using an attribute name with a period, use a different name without a period.
  2. Use the attribute method: You can use the attribute method to access the attribute value. For example, $user->getAttribute('first_name').
  3. Update the relationLoaded() method: You can update the relationLoaded() method to exclude the . character as a nested relationship.

Q: How can I update the relationLoaded() method?

A: To update the relationLoaded() method, you can use the following code:

namespace Illuminate\Database\Eloquent;

use Illuminate\Database\Eloquent\Model;

trait HasAttributes
{
    // ...

    public function relationLoaded($relation)
    {
        // ...

        if (strpos($relation, '.') !== false) {
            // Exclude the '.' character as a nested relationship
            return false;
        }

        // ...
    }
}

This update will exclude the . character as a nested relationship, solving the problem.

Q: What is the commit message for this update?

A: The commit message for this update should be:

Update relationLoaded() method to exclude '.' character as a nested relationship

This commit message clearly describes the update made to the relationLoaded() method.

Q: What is the API documentation for this update?

A: The API documentation for this update should include the following information:

  • Method: relationLoaded()
  • Description: Updates the relationLoaded() method to exclude the . character as a nested relationship.
  • Parameters: $relation
  • Returns: bool

This API documentation provides a clear description of the update made to the relationLoaded() method.

Conclusion

In conclusion, the update to the relationLoaded() method in Laravel 12.10.0 has caused problems when accessing attributes on a model that contain a period. This problem can be solved by using workarounds such as using a different attribute name, using the attribute method, or updating the relationLoaded() method. We hope this Q&A article has provided you with the information you need to solve this issue.