找不到类型的属性...自定义 Spring 数据存储库

问题描述

我正在尝试实现一个自定义 Spring 存储库.我有接口:

I'm trying to implement a custom Spring repository. I have the interface:

public interface FilterRepositoryCustom {
    List<User> filterBy(String role);
}

实施:

public class FilterRepositoryImpl implements FilterRepositoryCustom {
...
}

和主"存储库，扩展我的自定义存储库:

and the "main" repository, extending my custom repository:

public interface UserRepository extends JpaRepository<User, String>, FilterRepositoryCustom {
...
}

我正在使用 Spring Boot，并且根据 docs:

I'm using Spring Boot and, according to the docs:

默认情况下，Spring Boot 将启用 JPA 存储库支持并查看@SpringBootApplication 所在的包(及其子包)位于.

当我运行我的应用程序时，我得到了这个错误:

When I run my application, I get this error:

org.springframework.data.mapping.PropertyReferenceException: No property filterBy found for type User!

推荐答案

这里的问题是你正在创建 FilterRepositoryImpl 但是你在 用户存储库.您需要创建 UserRepositoryImpl 来完成这项工作.

The problem here is that you are creating FilterRepositoryImpl but you are using it in UserRepository. You need to create UserRepositoryImpl to make this work.

阅读此文档了解更多信息详情

基本上

public interface UserRepositoryCustom {
    List<User> filterBy(String role);
}

public class UserRepositoryImpl implements UserRepositoryCustom {
...
}

public interface UserRepository extends JpaRepository<User, String>, UserRepositoryCustom {
...
}

Spring Data 2.x 更新
这个答案是为 Spring 1.x 编写的.作为 Matt Forsythe 指出，命名期望随着 Spring Data 2.0 而改变.实现从 the-final-repository-interface-name-with-an-additional-Impl-suffix 更改为 the-custom-interface-name-with-an-additional-Impl-后缀.

Spring Data 2.x update
This answer was written for Spring 1.x. As Matt Forsythe pointed out, the naming expectations changed with Spring Data 2.0. The implementation changed from the-final-repository-interface-name-with-an-additional-Impl-suffix to the-custom-interface-name-with-an-additional-Impl-suffix.

所以在这种情况下，实现的名称是:UserRepositoryCustomImpl.

So in this case, the name of the implementation would be: UserRepositoryCustomImpl.

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