backend-architecture-mvc

name: backend-architecture-mvc description: MVC pattern in CodeIgniter, separation of concerns.

Backend Architecture MVC

When to use this skill

• Organizing CodeIgniter applications
• Separating concerns properly
• Building maintainable apps

Workflow

• Controllers handle HTTP requests
• Models handle data logic
• Views handle presentation
• Keep controllers thin
• Business logic in services

Instructions

Controller (Thin)

<?php

namespace App\Controllers;

use App\Services\UserService;

class UserController extends BaseController
{
    public function __construct(
        private readonly UserService $service
    ) {}

    public function index()
    {
        $users = $this->service->getAllUsers();
        return view('users/index', ['users' => $users]);
    }

    public function store()
    {
        $user = $this->service->createUser($this->request->getPost());
        return $this->respond($user);
    }
}

Model (Data Access)

<?php

namespace App\Models;

use CodeIgniter\Model;

class UserModel extends Model
{
    protected $table = 'users';
    protected $allowedFields = ['name', 'email'];
    protected $returnType = 'App\Entities\User';
}

Service (Business Logic)

<?php

namespace App\Services;

class UserService
{
    public function __construct(
        private UserModel $model
    ) {}

    public function getAllUsers()
    {
        return $this->model->findAll();
    }
}

Resources

• Controllers: thin, route to services
• Models: database operations only
• Services: business logic