我刚开始冬眠,被困在了一个问题上。我无法保存包含CustomObject的List< List< Coordinate>>。我将MySQL与SpingBoot结合使用。
CustomOjbect:
@Entity
public class CustomOjbect implements Serializable{
private static final long serialVersionUID = -4288223602669270676L;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
我知道orphanRemoval属性存在于hibernate-jpa-2.1-api-1.0.0.Final.jar中,这是在我的项目中使用的库。
我添加了Maven依赖项:
org.hibernate hibernate-核心4.3.0
我仍然得到错误:行中的The attribute orphanRemoval is undefined for the annotation type OneToMany:
@OneToMany(fetch = FetchType.LAZY, mappedBy = "id.store", cascade = {
Cas
我有三个类,一个名字是User,这个用户有其他类实例。就像这样;
public class User{
@OneToMany(fetch=FetchType.LAZY, cascade = CascadeType.ALL)
public List<APost> aPosts;
@OneToMany(fetch=FetchType.LAZY, cascade = CascadeType.ALL)
public List<BPost> bPosts;
}
public class BPost extends Post {
我正在开发EJB项目。但我有个问题。我得到这个查询的一个错误:
select u from Ucretlendirme u join u.tarife_KullanimTipiServis tks join tks.kullanimTipiServis ks join ks.servis s join tks.tarife t join ks.kullanimTipi k where s.servisID=:sID and t.tarifeID=:tID and k.kullanimTipiID=:kID
Error: javax.ejb.EJBException: javax.persi
我一直试图在我的一个实体中使用onDelete="SET NULL“,但是它返回这个错误:
[Creation Error] The annotation @ORM\OneToMany declared on property AppBundle\Entity\Genre::$movie does not have a property named "onDelete". Available properties: mappedBy, targetEntity, cascade, fetch, orphanRemoval, indexBy
实体看起来如下:
/**
*
我有两个实体-业务部,由一个部门组成
@Entity
@Table(name = "Business")
public class Business implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
@Column(name = "Id")
private Long id;
@OneToMany(mappedBy =
假设我的Person和Order实体处于单向的one-to-many关系中。
Person
@Entity
public class Person {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@OneToMany(mappedBy = "person")
Set<Order> orders = new HashSet<Order>();
// other fields, constructor, setters and gett
我试图在Play Framework2.1中创建一个带有JoinTable的单向OneToMany关系。然而,框架并没有生成'JoinTable':"transformation_input_files“。奇怪的是,如果我将关系更改为ManyToMany,则会生成表。代码如下:
所以它是关于一个包含多个S3Files的转换类。以下是转换文件:
@Entity
@Table(name = "transformations")
public class Transformation extends Model {
@Id
public Lo