Doctrine在prod环境Symfony2中没有正常工作

Question

似乎我的Symfony2项目的prod环境中的学说不能正常工作。

当我尝试执行以下代码时：

   $query = $em->createQuery("SELECT c FROM MyProjectDataTierBundle:WidgetContainer c WHERE c.identity = ?1");
   $query->setParameter(1, $container);
   $results = $query->getResult();
   $container = $results[0];
   $widgets = $container->getWidgets();

在开发环境中它正常运行并返回一个小部件的ArrayCollection，但是当我在prod环境中尝试这个时，我得到一个空数组。

我尝试删除缓存，但这无济于事。

下面我复制了带有映射的类，我做错了吗？

WidgetContainer.php

    <?php

        namespace MyProject\DataTierBundle\Entity;

        use Doctrine\ORM\Mapping as ORM;
        use Doctrine\Common\Collections\ArrayCollection;



        /**
         * @ORM\Entity()
         *
         */
        class WidgetContainer {

            /**
             * @var integer
             * @ORM\Column(name="id", type="integer")
             * @ORM\Id
             * @ORM\GeneratedValue(strategy="AUTO")
             */
            private $id;

            /**
             * @var string
             * @ORM\Column(name="name", type="string", length=255)
             */
            private $name;

            /**
             * @var string
             * @ORM\Column(name="identity", type="string", length=255)
             */
            private $identity;

            /**
             * @var \Doctrine\Common\Collections\ArrayCollection
             * @ORM\OneToMany(targetEntity="Widget",mappedBy="widgetContainer")
             */
            private $widgets;

            public function getId() { return $this->id; }
            public function setId($id) { $this->id = $id; return $this; }
            public function getName() { return $this->name; }
            public function setName($name) { $this->name = $name; return $this; }
            public function getIdentity() { return $this->identity; }
            public function setIdentity($identity) { $this->identity = $identity; return $this; } 
            public function getWidgets() { return $this->widgets; }
            public function setWidgets($widgets) { $this->widgets = $widgets; return $this; }

            public function __construct() {
                $this->widgets = new ArrayCollection();
            }

        }

    ?>

Widget.php

    <?php

        namespace MyProject\DataTierBundle\Entity;

        use MyProject\DataTierBundle\Entity\Traits\TTimeStampable;
        use MyProject\DataTierBundle\Entity\Traits\TOrderableInt;
        use Doctrine\ORM\Mapping as ORM;

        /**
         * Widget
         *
         * @ORM\Table()
         * @ORM\Entity
         * @ORM\HasLifecycleCallbacks
         * @ORM\InheritanceType("SINGLE_TABLE")
         * @ORM\DiscriminatorColumn(name="type", type="string")
         * @ORM\DiscriminatorMap({"content" = "ContentWidget", "slider" = "SliderWidget"})
         */
        class Widget {

            /**
             * @var integer
             * @ORM\Column(name="id", type="integer")
             * @ORM\Id
             * @ORM\GeneratedValue(strategy="AUTO")
             */
            private $id;

            /**
             * @var string
             * @ORM\Column(name="name", type="string", length=255)
             */
            private $name;

            /**
             * Can be small, medium, large, extra large
             * @ORM\Column(name="size", type="string", length=20)
             */
            private $size = "small";

            /**
             * @var boolean
             * @ORM\Column(name="active", type="boolean")
             */
            private $active = false;

            /**
             * @var string
             * @ORM\Column(type="string", length=5)
             */
            private $lang;

            /**
             * @ORM\ManyToOne(targetEntity="WidgetContainer", inversedBy="widgets")
             */
            private $widgetContainer;

            public function getId() { return $this->id; }
            public function getName() { return $this->name; }
            public function setName($name) { $this->name = $name; return $this; }
            public function getActive() { return $this->active; }
            public function setActive($active) { $this->active = $active; return $this; }
            public function getLang() { return $this->lang; }
            public function setLang($lang) { $this->lang = $lang; return $this; }
            public function getSize() { return $this->size; }
            public function setSize($size) { $this->size = $size; return $this; }
            public function getWidgetContainer() { return $this->widgetContainer; }
            public function setWidgetContainer($widgetContainer) { $this->widgetContainer = $widgetContainer; return $this; }


            use TTimeStampable;
            use TOrderableInt;

        }

    ?>

SliderWidget.php

    <?php

    namespace MyProject\DataTierBundle\Entity;

    use Doctrine\ORM\Mapping as ORM;

    /** @ORM\Entity */
    class SliderWidget extends Widget {

        /**
         * @ORM\OneToMany(targetEntity="SliderWidgetSlide", mappedBy="sliderWidget")
         */
        private $slides;

        public function getSlides() {
            return $this->slides;
        }

        public function setSlides($slides) {
            $this->slides = $slides;
            return $this;
        }

    }