Spring Boot 2.3.0-MongoDB库不会自动创建索引

Question

我提供了一个示例项目来阐明此问题：https://github.com/nmarquesantos/spring-mongodb-reactive-indexes

根据spring mongo db文档（https://docs.spring.io/spring-data/mongodb/docs/current/reference/html/#mapping-usage）：

the @Indexed annotation tells the mapping framework to call createIndex(…) on that property of your document, making searches faster. Automatic index creation is only done for types annotated with @Document.

在我的Player类中，我们可以同时观察@Document和@Indexed批注：

@Document
public class Player {

@Id
private String id;

private String playerName;

@Indexed(name = "player_nickname_index", unique = true)
private String nickname;


public Player(String playerName, String nickname) {
    this.id = UUID.randomUUID().toString();
    this.playerName = playerName;
    this.nickname = nickname;
}

public String getPlayerName() {
    return playerName;
}

public void setPlayerName(String playerName) {
    this.playerName = playerName;
}

public String getNickname() {
    return nickname;
}

public void setNickname(String nickname) {
    this.nickname = nickname;
}
}`

并且在我的应用程序类中，我正在插入一个元素以检查是否已成功填充数据库：

@PostConstruct
public void seedData() {
    var player = new Player("Cristiano Ronaldo", "CR7");

    playerRepository.save(player).subscribe();

}

如果在运行应用程序后检查MongoDb，则可以看到集合和成功创建的元素。

未创建昵称的唯一索引。我只能看到为@Id属性创建的索引。我有什么想念的吗？我是否误解了文档？

Answer 1

Spring Boot 2.3.0附带的Spring Data MongoDB版本。RELEASE是3.0.0.RELEASE。从Spring Data MongoDB 3.0开始，the auto-index creation is disabled by default.

要启用自动索引创建，请设置spring.data.mongodb.auto-index-creation = true，或者如果您具有自定义的Mongo配置，请设置override the method autoIndexCreation

autoIndexCreation