Collections 关于聚合域的一个域,如何使其保持最新?
在doctrine2中,我有一个单一的关联:一个应用程序多个应用程序 在应用程序实体中,我有一个agregate字段sumCosts:Collections 关于聚合域的一个域,如何使其保持最新?,collections,doctrine-orm,associations,aggregate,Collections,Doctrine Orm,Associations,Aggregate,在doctrine2中,我有一个单一的关联:一个应用程序多个应用程序 在应用程序实体中,我有一个agregate字段sumCosts: /** * @ORM\Column(type="decimal", scale=2) */ protected $sumCosts; 在调用addCost和removeCost时更新: // Application.php public function addCost(ApplicationCost $cost) { if (!$this->
/**
* @ORM\Column(type="decimal", scale=2)
*/
protected $sumCosts;
在调用addCost和removeCost时更新:
// Application.php
public function addCost(ApplicationCost $cost)
{
if (!$this->costs->contains($cost)) {
$this->sumCosts += $cost->getBalance();
$this->costs[] = $cost;
$cost->setApplication($this);
}
return $this;
}
public function removeCost(ApplicationCost $cost)
{
if ($this->costs->contains($cost)) {
$this->sumCosts -= $cost->getBalance();
$this->costs->removeElement($cost);
}
}
假设用户可以编辑现有的应用程序成本,并可以更改其父应用程序,如何确保此agregate字段是最新的
我的做法是:
// ApplicationCost.php
public function setApplication(Application $application = null)
{
if ($this->application !== null) {
$this->application->removeCost($this);
}
if ($application !== null) {
$application->addCost($this);
}
$this->application = $application;
return $this;
}
那好吗?或者我在这里犯了一些巨大的错误,成本可能不同步
编辑:我读过条令的聚合字段烹饪书,我有版本控制(我使用锁定机制)。我的问题不是关于并发性
编辑:我创建了一些测试
public function testSumCosts()
{
$app = new Application();
$costA = new ApplicationCost();
$costA->setBalance(150);
$costB = new ApplicationCost();
$costB->setBalance(100);
$costC = new ApplicationCost();
$costC->setBalance(50);
$app->addCost($costA);
$app->addCost($costB);
$app->addCost($costC);
$app->removeCost($costC);
$this->assertEquals(250, $app->sumCosts(), 'Costs are summed correctly');
}
public function testCostsChangeApplication()
{
$appA = new Application();
$appB = new Application();
$costA = new ApplicationCost();
$costA->setBalance(100);
$costB = new ApplicationCost();
$costB->setBalance(50);
$appA->addCost($costA);
$appB->addCost($costB);
$costA->setApplication($appB);
$costB->setApplication(null);
$this->assertEquals(0, $appA->sumCosts(), 'Costs are removed correctly');
$this->assertEquals(100, $appB->sumCosts(), 'Costs are added correctly');
}
在添加
$cost->setApplication($this)之后代码>至附录两项测试均为绿色。虽然我仍然怀疑我是否错过了什么。好吧,我想我终于达到了预期的效果。我将对其进行描述,以供将来参考,以及任何可能有相同问题的人:
首先,批改课文
// Application.php
public function addCost(ApplicationCost $cost)
{
if (!$this->costs->contains($cost)) {
$this->sumCosts += $cost->getBalance();
}
$this->costs[] = $cost;
return $this;
}
public function removeCost(ApplicationCost $cost)
{
if ($this->costs->contains($cost)) {
$this->sumCosts -= $cost->getBalance();
}
$this->costs->removeElement($cost);
}
如果您将其与我的原始代码进行比较,您将看到只有更新agregate字段才是有效的。这并没有什么坏处,因为集合不能保存重复的元素,也不能删除不存在的元素
其次,在关联的反面配置cascade={all}
选项(即在costs
insideapplication.php上)。因此,无论何时添加/删除成本,它们都会被持久化
待续。。。(必须测试当我从拥有方更改应用程序并仅持久化ApplicationCost->旧应用程序和新应用程序都会更新吗?)
// Application.php
public function addCost(ApplicationCost $cost)
{
if (!$this->costs->contains($cost)) {
$this->sumCosts += $cost->getBalance();
}
$this->costs[] = $cost;
return $this;
}
public function removeCost(ApplicationCost $cost)
{
if ($this->costs->contains($cost)) {
$this->sumCosts -= $cost->getBalance();
}
$this->costs->removeElement($cost);
}