Spring MongoDB在保存后获取插入项目的ID

本文介绍了Spring MongoDB在保存后获取插入项目的ID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

我正在使用Spring MongoDb.

I am working with Spring MongoDb.

我使用insert方法创建各种实体: docs.spring.io/spring-data/mongodb/docs/current/api/org/springframework/data/mongodb/core/MongoOperations.html#insert-java.lang.Object-

I create various entities using insert method: docs.spring.io/spring-data/mongodb/docs/current/api/org/springframework/data/mongodb/core/MongoOperations.html#insert-java.lang.Object-

但是，所有方法都返回void.我需要返回插入文档的ObjectId.

However, all methods return void. I need to return the ObjectId of the inserted document.

获得它的最好方法是什么?

What is the best way to get it?

推荐答案

这很有趣，我想分享一下.我只是在上面的BatScream评论的帮助下找到了解决方案:

This is pretty interesting and thought I would share. I just figured out the solution for this with the help of BatScream comment above:

您将创建一个对象并将其插入到MongoDB中:

You would create an object and insert it into your MongoDB:

Animal animal = new Animal(); animal.setName(name); animal.setCat(cat); mongoTemplate.insert(animal);

您的动物类如下所示，其中包含所有字段的吸气剂和设置:

Your animal class looks like this with getters and settings for all fields:

public class Animal { @Id @JsonProperty private String id; @JsonProperty private String name; @JsonProperty private String cat; public String getId() { return id; } }

在mongoTemplate.insert(animal);下完成插入后，您实际上可以调用方法animal.getId()，它将返回创建的ObjectId.

AFTER you have done the insert under mongoTemplate.insert(animal);, you can actually call the method animal.getId() and it will return back the ObjectId that was created.