Question

我的Clutch.php entity内有以下代码。

/**
 * Set incubationTemp
 *
 * @param integer $incubationTemp
 * @return Clutch
 */
public function setIncubationTemp($incubationTemp)
{
    $this->incubationTemp = $incubationTemp;

    if($incubationTemp > 77.5 && $incubationTemp < 82.5){
        $estimatedHatchStart = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+60days');
        $estimatedHatchEnd = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+70days');
    } 
    else if($incubationTemp > 82.5 && $incubationTemp < 88.5) {
        $estimatedHatchStart = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+45days');
        $estimatedHatchEnd = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+55days');
    }
    else if($incubationTemp > 88.5 && $incubationTemp < 92.5) {
        $estimatedHatchStart = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+35days');
        $estimatedHatchEnd = new \DateTime($this->getLaidDate()->format('Y-m-d') . '+45days');
    } else {
        // Throw an error here
    }

    $this->setEstimatedHatchStart($estimatedHatchStart);
    $this->setEstimatedHatchEnd($estimatedHatchEnd);

    return $this;
}

如果传递的值介于我在if语句中可以看到的值之间，那么它可以正常工作。我想做的是强制显示错误，以显示$incubationTemp的值是否超出正在检查的值。实现这一目标的最佳方法是什么？

编辑：

根据彼得的回答。这完美地运作了：

use Symfony\Component\Validator\Constraints as Assert;

// ...

/**
 * @var integer
 *
 * @ORM\Column(name="incubation_temp", type="integer")
 * @Assert\Range(
 *      min = 78,
 *      max = 92,
 *      minMessage = "The fahrenheit value you have entered is not a suggested value for incubating leopard geckos. Please make sure the value is at least {{ limit }}°f.",
 *      maxMessage = "The fahrenheit value you have entered is not a suggested value for incubating leopard geckos. Please make sure the value is lower than {{ limit }}°f."
 * )
 */
private $incubationTemp;

Answer 1

不可能有最好的＆＃34;方式，但例外是一种选择：

class InvalidIncubationTemperatureException extends \DomainException {}

然后

else {
    throw new InvalidIncubationTemperatureException(
        'Whatever message you want'
    )
}

当你说＆＃34; show＆＃34;错误可能意味着许多事情，但让我们假设您处于控制器环境中

try {
    $clutch = new Clutch();
    $clutch->setIncubationTemp(0);
}
catch (InvalidIncubationTemperatureException $e)
{
    $this->addFlash('clutch_errors', $e->getMessage())
}

然后在你的树枝

{% set errors = app.session.flashbag.get('clutch_errors') %}
{% if errors|length %}
  {% for message in errors %}
    {{ message}}
  {% endfor %}
{% endif %}

或者你喜欢的任何机制。

然而，处理此问题的更好方法可能是使用validation

如果值与if语句不匹配，则在Symfony2实体内部抛出错误

1 个答案: