mongodb - mongodb 更改流无法解析订阅

Question

我想在 mongo db 上设置一个更改流，但是有一个“无法解决重载方法订阅”，我无法找到问题的根源：

import org.mongodb.scala.{Document, MongoClient, MongoCollection, MongoDatabase}

object App {

  def main(args: Array[String]): Unit = {

      val mongoClient: MongoClient = MongoClient("mongodb://localhost")

      val database: MongoDatabase = mongoClient.getDatabase("db")

      val collection: MongoCollection[Document] = database.getCollection("col")
          collection.watch().subscribe(
            (doc: Document) => println(doc.toJson),
            (t: Throwable) => println(""),
              () => println()
          )
  }

}


libraryDependencies += "org.mongodb.scala" %% "mongo-scala-driver" % "2.7.0"

Answer 1

代替：

(doc: Document) => println(doc.toJson),

和：

(csd: ChangeStreamDocument[Document]) => println(csd.getFullDocument()),