MongoDB 唯一索引不允许覆盖 [英] MongoDB unique indexes disallow overwrite

问题描述

我在我的 Mongo 文档中的一个字段上创建了一个 unique=true 的索引.这按预期工作 - 它通过覆盖现有条目来禁止重复.

I have created an index with unique=true on one of the fields in my Mongo document. This works as expected - it disallows duplicates by overwriting the existing entry.

我想禁止覆盖，而是在尝试插入重复项时收到错误或异常.有没有办法做到这一点?我将如何使用 Spring Data MongoDB 执行此操作?

I would like to disallow overwrites, and instead get an error or exception when an attempt is made to insert a duplicate. Is there any way to do this? How would I do this with Spring Data MongoDB?

推荐答案

通过将 WriteConcern=SAFE 添加到 MongoTemplate 配置中，我能够在违反unique=true"约束时获得异常.我处理异常并禁止覆盖.

By adding WriteConcern=SAFE to the MongoTemplate configuration, I was able to get exceptions when the "unique=true" constraint is violated. I handle the exception and disallow overwrites.

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