mongodb - Doctrine/MongoDB : Use key-value pairs instead numeric array

Question

我正在将 Doctrine ODM 与 MongoDB 结合使用。我有一个这样的“产品模型”:

namespace Cms\Model;

/** @Document(collection="products") */
class Product
{
    /** @Id */
    private $id;

    /** @String */
    private $title;

    /** @String */
    private $description;

    /** @Date */
    private $createdAt;

    /** @EmbedMany(targetDocument="Cms\Model\ProductParam") */
    private $params;

    /** @EmbedOne(targetDocument="Cms\Model\Coordinate") */
    private $coordinate;

    public function  __construct()
    {
        $this->details = new \Doctrine\Common\Collections\ArrayCollection();
        $this->params = new \Doctrine\Common\Collections\ArrayCollection();
    }
}

我的 ProductParam 模型是这样的:

namespace Cms\Model;

/** @EmbeddedDocument */
class ProductParam
{
    /** @String */
    private $type;

    /** @String */
    private $value;
}

当我插入具有此模式的文档时，结果是这样的:

{
   "_id": ObjectId("4d17ac603ffcf6d01300002a"),
   "title": "Peugeot 206 2001-X-Reg, 1.4lx Air-con, 12 months mot, Credit Cards Accepted.",
   "description": "PEUGEOT 206 1.4LX IMMACULATE THROUGHOUT DRIVES ABSOLUTELY SUPERB",
   "params": {
     "0": {
       "type": "carBrand",
       "value": "PEUGEOT"
    },
     "1": {
       "type": "carModel",
       "value": "206 LX"
    }
}

但是我需要的是这样的:

{
   "_id": ObjectId("4d17ac603ffcf6d01300002a"),
   "title": "Peugeot 206 2001-X-Reg, 1.4lx Air-con, 12 months mot, Credit Cards Accepted.",
   "description": "PEUGEOT 206 1.4LX IMMACULATE THROUGHOUT DRIVES ABSOLUTELY SUPERB",
   "params": {
     carBrand: "PEUGEOT",
     carModel: "206 LX"
   }
}

我该怎么做？谢谢。

Answer 1

我建议你不要使用 PostLoad、PrePersist 等，因为它们真的很昂贵，而是使用 strategy="set"例如:

@EmbedMany(targetDocument="Field", strategy="set")