jpa - Spring Data 通过枚举查找

Question

我遇到了这样的问题，不知道如何解决。接下来是问题:我有下一个模型:

@Entity(name="Authority")
@Table(name="AUTHORITIES")
public class Authority implements GrantedAuthority {

@Id
private long id;

@Enumerated(EnumType.STRING)
@Column(name="authority")
private asdevelopment.action.enums.Authority authority;

/**
 * 
 */
private static final long serialVersionUID = 1L;

@Override
public String getAuthority() {
    return authority.toString();
}

/**
 * @return the id
 */
public long getId() {
    return id;
}

}


public enum Authority {

CLIENT_ROLE, ADMIN_ROLE;

}

我可以保存权限并通过ID获取，没有任何问题。但是当我调用存储库中的下一个方法时:

domain.Authority findByAuthority(enums.Authority authority);

我得到下一个异常(exception):

Hibernate: select top ? authority0_.id as id1_, authority0_.authority as authority1_ from AUTHORITIES authority0_ where authority0_.authority=?
13:48:01.125  WARN [main] org.hibernate.engine.jdbc.spi.SqlExceptionHelper:143 - SQL   Error: 1064, SQLState: 42000
13:48:01.125 ERROR [main] org.hibernate.engine.jdbc.spi.SqlExceptionHelper:144 - You    have an error in your SQL syntax; check the manual that corresponds to your MySQL server    version for the right syntax to use near '2 authority0_.id as id1_, authority0_.authority as authority1_ from AUTHORITIES ' at line 1

Answer 1

选择顶部？ ... 肯定不是 MySQL 的有效查询。

检查 SQL dialect setting在你的 Hibernate 配置中。