Mongo Scala驱动程序集合不更新文档

Question

def read() = {
val query = Document("title" -> "Text Tiling")
methods.find(query).subscribe(
  (method: Document) => update(method.toJson()),                              // onNext
  (error: Throwable) => Logger.debug(s"Query failed: ${error.getMessage}"),   // onError
  () => Logger.debug("onComplete")                                            // onComplete
)}

def update(jsonSting:String): Unit = {
Logger.debug("update() " + jsonSting)

Logger.debug(methods.find().first().toString)
val observer = new Observer[UpdateResult] {
  override def onSubscribe(subscription: Subscription): Unit = {
    Logger.debug("onSubscribe: " + subscription.toString)
  }
  override def onComplete: Unit = {
    Logger.debug("onComplete")
  }
  override def onError(e: Throwable): Unit = {
    Logger.debug("onError: " + e.getMessage)
  }
  override def onNext(doc: UpdateResult) {
    Logger.debug("onNext")
  }
}

val filter = Document("title" -> "Text Tiling")
val mod = Document("$set" -> Document("reputation" -> 5))
val result = methods.updateOne(filter,mod).subscribe(observer)
Logger.debug("result: " + result)}

[debug]应用程序-update（）{“_id”：{“$OID”：“5759542A4E0BF602ADCAB149”},“title”：“文本平铺”,“信誉”：0}

[debug]application-org.mongodb.scala.observableImplicits$boxedobservable@61ddc581

[debug]application-onsubscribe:org.mongodb.scala.observableimplicits$boxedsubscribut@6252b659

[debug]应用程序-结果：（）

[debug]应用程序-onComplete

Answer 1

我对订阅的电话请求起作用了。其他事件随后被调用。

override def onSubscribe(subscription: Subscription): Unit = {
    subscription.request(1)
  }

[debug]应用程序-onNext

[调试]应用程序-OnComplete！