Spring Data REST 和自定义实体查找(提供错误类型的 id) [英] Spring Data REST and custom entity lookup (Provided id of the wrong type)

问题描述

我有一个看起来像这样的模型:

I have a model that looks something like this:

@Entity
public class MyModel {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    @Column(unique = true, nullable = false)
    @RestResource(exported = false)
    private int pk;

    @Column(unique = true, nullable = false)
    private String uuid = UUID.randomUUID().toString();

    @Column(nullable = false)
    private String title;

    public int getPk() {
        return pk;
    }

    public void setPk(int pk) {
        this.pk = pk;
    }

    public String getUuid() {
        return uuid;
    }

    public void setUuid(String uuid) {
        this.uuid = uuid;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }
}

如您所见，我有一个自动递增的 PK 作为模型的 ID，还有一个随机的 UUID.我想使用数据库中的 PK 作为主键，但想使用 UUID 作为面向公众的 ID.(用于网址等)

As you can see I have an auto-incrementing PK as my ID for the model, but also a random UUID. I want to use the PK in the database as the primary key, but want to use the UUID as a public facing ID. (To be used in URLs etc.)

我的存储库如下所示:

@RepositoryRestResource(collectionResourceRel = "my-model", path = "my-model")
public interface MyModelRepository extends CrudRepository<MyModel, String> {

    @RestResource(exported = false)
    MyModel findByUuid(@Param("uuid") String id);
}

如您所见，我已将存储库设置为使用字符串作为 ID.

As you can see I've set the repository to use a String as the ID.

最后，我在这样的配置文件中设置了实体查找:

Finally I set the entity lookup in a config file like this:

@Component
public class RepositoryEntityLookupConfig extends RepositoryRestConfigurerAdapter {

    @Override
    public void configureRepositoryRestConfiguration(RepositoryRestConfiguration config) {

        config.withEntityLookup().forRepository(MyModelRepository.class, MyModel::getUuid, MyModelRepository::findByUuid);

    }
}

这对于 GET 和 POST 请求非常有效，但由于某种原因，我在 PUT 和 DELETE 方法上返回了一个错误.

This works perfectly well for GET and POST requests, but for some reason I get an error returned on PUT and DELETE methods.

o.s.d.r.w.RepositoryRestExceptionHandler : Provided id of the wrong type for class MyModel. Expected: class java.lang.Integer, got class java.lang.String

有谁知道这可能是什么原因造成的?我不明白为什么它期待一个整数.

Anyone know what might be causing this? I don't understand why it's expecting an Integer.

我可能在做一些愚蠢的事情，因为我对这个框架还很陌生.感谢您的帮助.

I may be doing something stupid as I'm quite new to the framework. Thanks for any help.

推荐答案

域对象的标识符显然是 int 类型.这意味着，您的存储库需要声明为 extends CrudRepository.

The identifier of your domain object is obviously of type int. That means, your repository needs to be declared as extends CrudRepository<MyModel, Integer>.

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