mongodb - 为嵌套案例类自动创建 mongo 编解码器

Question

我想为嵌套的案例类自动创建 mongo 编解码器，这些案例类很大并且有很多层次的组合。

举个简单的例子，假设我想为以下类创建编解码器：

case class Person(name: String, address: Address, birthDate: Date)
case class Address(country: String, city: String, streetAddress: String)

使用 createCodecProvider 时：

    private val customCodecs = Macros.createCodecProvider[Person]()

    private val javaCodecs = CodecRegistries.fromCodecs(
        new DateCodec())

    private val codecRegistry = fromRegistries(fromProviders(customCodecs),
        javaCodecs,
        DEFAULT_CODEC_REGISTRY)

我收到错误：

org.bson.codecs.configuration.CodecConfigurationException: Can't find a codec for class io.equalum.server.alert.Address.

以下方法确实有效：

    private val customCodecs = fromProviders(classOf[Person], classOf[Address])

    private val javaCodecs = CodecRegistries.fromCodecs(
        new DateCodec())

    private val codecRegistry = fromRegistries(customCodecs,
        javaCodecs,
        DEFAULT_CODEC_REGISTRY)

但是，当然，对于大型案例类，这将很难编写和维护。