17 | Persist error @ManyToMany how to define correct entities relationships too). @Entity public class Product implements Serializable { @Id @GeneratedValue ... public static class Product implements Serializable { @Id //@GeneratedValue ... ; import javax.persistence.GeneratedValue; import javax.persistence.Id; import javax.persistence |
7 | javax.persistence.TableGenerator is specified for the GeneratedValue annotation. A table generator may be specified on the entity class or ... _ID", allocationSize=1) @Id @GeneratedValue(strategy=TABLE, generator ... ", pkColumnValue="ADDR_ID") @Id @GeneratedValue(strategy=TABLE, generator="addressGen |
3 | javax.persistence.SequenceGeneratorjavax.persistence Annotation SequenceGenerator Target: Classes and fields (including property get methods) Defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A sequence generator may be specified on the entity |
3 | javax.persistence.Id: @Id public Long getId() { return id; } Since: JPA 1.0 See Also: Column GeneratedValue Learn |
3 | javax.persistence.GenerationType See Also: GeneratedValue Learn how to define and use automatic value generation in Chapter 2 of the ObjectDB |
3 | Step 2: Entity Class and Persistence Unit.Date; import javax.persistence.Entity; import javax.persistence.GeneratedValue; import javax ... serialVersionUID = 1L; // Persistent Fields: @Id @GeneratedValue Long id |
3 | Step 2: Define a JPA Entity Class.GeneratedValue; import javax.persistence.Id; @Entity public class Guest implements Serializable ... @GeneratedValue Long id; private String name; private Date signingDate |
2 | New entity objects are duplicated on merge cascading(); } @Entity public static class Book { @Id @GeneratedValue(strategy ... static class Chapter { @Id @GeneratedValue(strategy = GenerationType.AUTO ... A { @Id @GeneratedValue long id; @OneToOne(fetch = FetchType.LAZY, cascade |
2 | Step 2: Define a JPA Entity Class { private static final long serialVersionUID = 1L; @Id @GeneratedValue private long |
2 | Step 2: Define a JPA Entity Class @GeneratedValue private long id; private int x; private int y; public Point |
