Entities and Mappings in Doctrine - php

Question

I'm trying to learn Doctrine2, and am having some trouble wrapping my brain around Entities and Mappings, and how to pull data from the db.
If I understand correctly, an Entity would be created for data in my db, like a User or a Product.
That's where I'm getting hung up though. I have a simple database with tables like User and such. Do I need to create an Entity called "User"? And does that entity pull data from the User table, and then I get data from the User entity?
Can someone provide me a code example of how I would do this?

Answer 1

Entities are regular PHP classes... First u have to create ur table, then u create your entity. Properties of class should be private with setters and getters and usually with same names as field in table. When U want to put new record in DB, u must make instance of class u want and set values then persist and flush the entity manager. Example code:
<?php
namespace Entity;
/**
* #Entity
* #Table(name="users")
*/
class User {
/** #Id
* #Column(type="integer")
* */
private $id;
/** #Column(type="string") */
private $username;
/** #Column(type="string") */
private $password;
/** #Column(type="boolean") */
private $active;
public function getId() {
return $this->id;
}
public function setId($id) {
$this->id = $id;
}
public function getUsername() {
return $this->username;
}
public function setUsername($username) {
$this->username = $username;
}
public function getPassword() {
return $this->password;
}
public function setPassword($password) {
$this->password = $password;
}
public function getActive() {
return $this->active;
}
public function setActive($active) {
$this->active = $active;
}
}
and when u want to put a new record:
$user = new Entity\User();
$user->setName('users name');
$user->setPassword('password');
$entityManager->persist($user); // put that entity in queue;
$entityManager->flush(); // execute all pending entities
If u want to get existing record
$found = $entityManager->find('className', $id); // search by id
or $entityManager->getRepository('className')->findOneBy(array('field', 'value'));