使用MongoDB Java 3.0驱动程序批量Upsert

本文介绍了使用MongoDB Java 3.0驱动程序批量Upsert的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

在MongoDB Java驱动程序的早期版本中，要运行查询并对结果执行无序批量upsert，我们所做的就是：

In the earlier versions of MongoDB Java drivers , to run a query and do unordered bulk upsert on the result all we had do was :

BulkWriteOperation bulk = dbCollection.initializeUnorderedBulkOperation(); bulk.find(searchQuery).upsert().update(new BasicDBObject("$set", getDbObjectModel()));

但是在版本3中，随着Bson Document支持和MongoCollection.bulkWrite（）方法的引入怎么能这样做了吗？

But in version 3, with the introduction of Bson Document support and MongoCollection.bulkWrite() method how can this be done?

我试过这个：

List<WriteModel<Document>> documentList = new ArrayList<>(); collection.bulkWrite(documentList, new BulkWriteOptions().ordered(false));

但是，我需要upsert功能。

but, I need the upsert functionality.

谢谢。

推荐答案

您仍然可以使用所有功能，只是BulkWrites现在有不同的语法：

You can still use all of the functionality, it's just that BulkWrites now have a different syntax:

MongoCollection<Document> collection = db.getCollection("sample"); List<WriteModel<Document>> updates = Arrays.<WriteModel<Document>>asList( new UpdateOneModel<Document>( new Document(), // find part new Document("$set",1), // update part new UpdateOptions().upsert(true) // options like upsert ) ); BulkWriteResult bulkWriteResult = collection.bulkWrite(updates);

所以你使用 UpdateOneModel （如果需要，可以为很多人设置）并设置 UpdateOptions 作为构造函数的第三个参数。

So you use the UpdateOneModel ( or for many if you want ) and set the UpdateOptions as the third argument to the constructor.

需要习惯，但它基本上只是构建列表，其语法与其他地方相同。我猜这是改变的主要原因。

Takes some getting used to, but it's basically just building "Lists" with all the same syntax as elsewhere. I guess that's the main reason for the change.