In PHP, the Unit of Work sample is a design pattern that is normally utilized in Object-Relational Mapping (ORM) systems. The pattern is used to tune changes to objects and to control the endurance of these modifications to the database.
The Unit of Work pattern includes the following key additives:
- Entity Manager: This aspect is chargeable for dealing with the persistence of objects and tracking modifications made to them.
- Entities: These are the objects that represent domain entities and are mapped to database tables.
- Repository: This factor is chargeable for querying and persisting entities in the database.
Example:
Let’s say you’re building a web application that allows users to manage their to-do lists. You have a “Task” entity that represents a to-do item and is mapped to a “responsibilities” table inside the database. You need to put into effect the Unit of Work sample to control changes to obligations and persist them in the database.
Here is an example implementation in PHP:
<?php
class Task {
private $id;
private $description;
private $completed;
public function __construct($description) {
$this->description = $description;
$this->completed = false;
}
public function getId() {
return $this->id;
}
public function getDescription() {
return $this->description;
}
public function setDescription($description) {
$this->description = $description;
}
public function isCompleted() {
return $this->completed;
}
public function complete() {
$this->completed = true;
}
}
class TaskRepository {
private $entityManager;
public function __construct($entityManager) {
$this->entityManager = $entityManager;
}
public function getById($id) {
return $this->entityManager->find('Task', $id);
}
public function save($task) {
$this->entityManager->persist($task);
$this->entityManager->flush();
}
public function delete($task) {
$this->entityManager->remove($task);
$this->entityManager->flush();
}
}
class TaskManager {
private $taskRepository;
public function __construct($taskRepository) {
$this->taskRepository = $taskRepository;
}
public function markTaskAsCompleted($taskId) {
$task = $this->taskRepository->getById($taskId);
$task->complete();
$this->taskRepository->save($task);
}
}
// Example usage
$entityManager = new EntityManager();
$taskRepository = new TaskRepository($entityManager);
$taskManager = new TaskManager($taskRepository);
$task = new Task("Buy groceries");
$taskRepository->save($task);
$taskManager->markTaskAsCompleted($task->getId());
?>
In this case, the Task entity represents a to-do object with a description and a final touch repute. The TaskRepository is chargeable for querying and persisting Task entities to the database using an instance of EntityManager. The TaskManager uses the TaskRepository to mark a mission as completed by loading the challenge through ID, updating its finishing touch popularity, after which saving it is returned to the database. The EntityManager is chargeable for tracking adjustments made to Task entities and flushing the changes to the database using the persist and flush methods.
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