在Spring Data MongoDB中与众不同 [英] Distinct in Spring Data MongoDB

问题描述

有人尝试使用Spring Data for Mongo将distinct合并到查询中.如果您有示例，请张贴.我应该在哪里以及如何添加distinct flag?

Has anyone tried incorporating distinct in their query using Spring Data for Mongo. If you have an example can you please post it. Where and how should I include the distinct flag?

链接到Spring Data Mongo示例-Example 4.4. Query creation from method names

// Enables the distinct flag for the query
List<Person> findDistinctPeopleByLastnameOrFirstname(String lastname, String firstname);
List<Person> findPeopleDistinctByLastnameOrFirstname(String lastname, String firstname);

推荐答案

自发布此问题以来，地段已更改.随着这个问题不断出现，回答了我自己的问题.

Lot has changed since this question was posted. Answering my own question as this question keeps popping up.

从3.0及更高版本开始提供支持

Support is there since 3.0 and higher

public DistinctIterable<String> getUniqueTask() {
    return mongoTemplate.getCollection(TABLE).distinct("FIELD", String.class);
}

侧面注意:您甚至可以向该查询添加过滤器/正则表达式.阅读文档.如果找不到，请ping，将发布答案.

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