CRUD存儲庫沒有返回超類數據

Question

我有一個類，它擴展了另一個類的一些基本屬性。我正在使用CRUD存儲庫與我的MySql數據庫進行通信。我沒有得到在基類中定義的字段的值。

例如：我將createdBy和modifiedBy設置爲null。

實體類

@JsonInclude(JsonInclude.Include.NON_NULL) 
@Entity 
@Table(name = "user") 
class User extends BaseEntity { 

@JsonProperty("id") 
@Id 
@GeneratedValue(strategy = GenerationType.AUTO) 
@Column(name = "id") 
private String id; 

@JsonProperty("firstName") 
@Column(name = "first_name") 
private String firstName; 

@JsonProperty("lastName") 
@Column(name = "last_name") 
private String lastName; 

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

/** 
    * @param id the id to set 
    */ 
public void setId(String id) { 
    this.id = id; 
} 

/** 
    * @return the firstName 
    */ 
public String getFirstName() { 
    return firstName; 
} 

/** 
    * @param firstName the firstName to set 
    */ 
public void setFirstName(String firstName) { 
    this.firstName = firstName; 
} 

/** 
    * @return the lastName 
    */ 
public String getLastName() { 
    return lastName; 
} 

/** 
    * @param lastName the lastName to set 
    */ 
public void setLastName(String lastName) { 
    this.lastName = lastName; 
} 
} 

基類

class BaseEntity { 

@JsonProperty("createdBy") 
@Column(name = "created_by") 
public String createdBy; 

@JsonProperty("modifiedBy") 
@Column(name = "modified_by") 
public String modifiedBy; 

/** 
    * @return the createdBy 
    */ 
public String getCreatedBy() { 
    return createdBy; 
} 

/** 
    * @param createdBy the createdBy to set 
    */ 
public void setCreatedBy(String createdBy) { 
    this.createdBy = createdBy; 
} 

/** 
    * @return the modifiedBy 
    */ 
public String getModifiedBy() { 
    return modifiedBy; 
} 

/** 
    * @param modifiedBy the modifiedBy to set 
    */ 
public void setModifiedBy(String modifiedBy) { 
    this.modifiedBy = modifiedBy; 
} 
} 

庫

@Transactional 
public interface UserRepo extends CrudRepository < User, String > {} 

服務實現方法

public User getUser(String userId) { 
    User user = gUnifyUserRepository.findOne(userId); 
    //Here the data for createdBy and modifiedBy is returned as null though i have value in DB 
    return response; 
} 

任何幫助表示讚賞。

Answer 1

public class BaseEntity implements Serializable { 

    @LastModifiedDate 
    private Date lastModified; 
    @CreatedDate 
    private Date createdAt; 

使用上面的代碼，讓我知道