Spring Data MongoDB：当Document嵌入另一个时，如何忽略唯一索引字段？

问题描述

我的Contract类定义如下：

I have a Contract class defined like this:

@Document
public class Contract {

    @Id
    private String id;

    @Indexed(unique = true)
    private String ref;

    private String status = "pending";

    // getter & setter & hashcode & equals & tostring...
}

我想保存合同状态随着时间的推移，所以我创建了像这样的Version类：

I want to save contract state over time, so I created a Version class like this:

@Document
public class Version {

    @Id
    private String id;

    private Contract contract;

    private Instant createdAt;

    // getter & setter & hashcode & equals & tostring...
}

当我尝试多次保存版本对象时，我有一个重复的键异常。我认为这是合约裁判的重复关键指数，在这里抱怨。

When I try to save multiple times the version object over time, I have a duplicate keys exception. I think it's the duplicate key index on contract's ref which complains here.

我怎样才能做到这一点？

How can I achieve this kind of thing?

推荐答案

只需像这样添加@Reference：

Simply add @Reference like this:

@Document
public class Version {

  @Id
  private String id;

  @Reference
  private Contract contract;

  private Instant createdAt;

  // getter & setter & hashcode & equals & tostring...
}

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