有没有办法在 ReactiveMongo 上执行批量更新? [英] Is there any way to perform bulk updates on ReactiveMongo?

问题描述

假设我想执行以下操作(在 mongo shell 中):

Suppose I want to do the following (in mongo shell):

var bulk = db.vectors.initializeOrderedBulkOp()

bulk.find({"_id" : ObjectId("53f265da13d3f885ed8bf75d")}).updateOne({"$pop": {"v": 1}})

bulk.find({"_id" : ObjectId("53f265da13d3f885ed8bf75d")}).updateOne({"$push": {"v": 5}})

bulk.execute()

推荐答案

我找到了答案！ReactiveMongo 有 RawCommand 命令，可以让我们运行任何 MongoDB 命令(比如更新，在这种情况下 >> http://docs.mongodb.org/manual/reference/command/update/#dbcmd.update):

I found the answer! ReactiveMongo has RawCommand command that let us run any MongoDB command (like update, in this case >> http://docs.mongodb.org/manual/reference/command/update/#dbcmd.update):

  val commandDoc =
        BSONDocument(
          "update" -> COLLECTION,
          "updates" -> BSONArray(
            BSONDocument("q" -> <query>, "u" -> BSONDocument("$pop" -> BSONDocument("v" -> 1))),
            BSONDocument("q" -> <query>, "u" -> BSONDocument("$push" -> BSONDocument("v" -> 5)))
          ),
          "ordered" -> true
        )

      // we get a Future[BSONDocument]
      val futureResult = db.command(RawCommand(commandDoc))

      futureResult.map { result => // result is a BSONDocument
           //...
      }

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