MongoDb批量操作获取ID [英] MongoDb bulk operation get id

问题描述

我想通过MongoDb执行批量操作.如何获取将在其后返回的ID数组?

I want to perform bulk operation via MongoDb. How to get array of Ids that will be returned after it?

我可以在不使用批量操作的情况下更快地执行单操作插入吗?您能建议我其他方法吗? 我正在使用C# mongoDb driver 2.0和MongoDb v. 3.0.2

Can i perform single-operation insert faster without using bulk ? Can you advise me some other approach ? I'm using C# mongoDb driver 2.0 and MongoDb v. 3.0.2

更新: 我找到了以下解决方案-保存mongo集合的最大ObjectId

update: I found the following solution - save maximum ObjectId of mongo collection,

db.col.find().sort({_id:-1}).limit(1).pretty()

，并在插入后执行相同的操作 这样我们就可以获得插入文档的范围，这有意义吗?

and do the same after insert So we will get the range of inserted documents, does it make a sense?

推荐答案

您可以使用带有InsertManyAsync的新驱动程序批量插入项目.如果您希望驱动程序为这些项目生成的ID，则只需在插入项目后将它们从项目本身中取出即可.例如:

You can insert items in bulk using the new driver with InsertManyAsync. If you want the Ids that the driver generated for these items you can simply get them out of the items themselves after they are inserted. For example:

Hamster[] hamsters = { new Hamster { Name = "Vaska" }, new Hamster { Name = "Petzka" } };
await collection.InsertManyAsync(hamsters);
var insertedIDs = hamsters.Select(_ => _.Id);

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