具有递归结构的ReactiveMongoDB插件

Question

我使用带有插件的 Play Framework 2.2.1 和 reactivemongo "org.reactivemongo" %% "play2-reactivemongo" % "0.10.2"

我的模型：

package models
import system.db.Mongo
import play.api.libs.concurrent.Execution.Implicits.defaultContext
import play.api.libs.json.Json
import scala.concurrent.Awaitable
import scala.concurrent.duration._
import scala.concurrent.Await
object Template {
  import system.db.Mongo.JsonFormats._
  def findAll = Await.result(Mongo.templates.find(Json.obj()).cursor[Template].collect[List](), 3 seconds)
}
case class Template(name: String, marks: List[Mark], sections: List[Section])
case class Mark(name: String, description: String, index: Int, indexTree: String, dataType: String, rate: Int)
case class Section(name: String, index: Int, indexTree: String, marks: List[Mark], section: List[Section])

Mongo.templates是一个JSONCollection： val templates: JSONCollection = db.collection[JSONCollection]("Templates")

Json格式：

object JsonFormats {
    implicit val markFormat = Json.format[Mark]
    implicit val sectionFormat = Json.format[Section]
    implicit val templateFormat = Json.format[Template]
}

当我用数据调用Template.findAll时

{
    "name": "Caption",
    "sections": [{
        "name": "Section name",
        "index": 1,
        "indexTree": "1",
        "marks": [],
        "sections": []
    }],
    "marks": []
}

存在执行异常： [RuntimeException： JsError（List（（/section（0）/section，List（ValidationError（error.path.missing，WrappedArray（）

）））））]

但它适用于空白部分：{"name": "Caption", "sections": [], "marks": []}

此驱动程序是否支持回收结构？

Answer 1

嗯。我已经解决了将归档部分重命名为部分：

case class Template(name: String, marks: List[Mark], sections: List[Section])
case class Mark(name: String, description: String, index: Int, indexTree: String, dataType: String, rate: Int)
case class Section(name: String, index: Int, indexTree: String, marks: List[Mark], parts: List[Section])

收集：

{
    "name": "Caption",
    "sections": [{
        "name": "Section name",
        "index": 1,
        "indexTree": "1",
        "marks": [],
        "parts": [{
           ...
           "parts": [...]
        }, ...]
    }],
    "marks": []
}