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( strategy = GenerationType . AUTO ) long id; : } AUTO is the default strategy, so the following ... = GenerationType . IDENTITY ) long id; : } The IDENTITY strategy also generates an automatic value ... EntityWithSequenceId { // Use the sequence that is defined above: @GeneratedValue ( strategy = GenerationType

JPA Enum GenerationType java.lang.Object ∟  java.lang.Enum ∟  javax.persistence. GenerationType Defines the types of primary key generation strategies. See Also: GeneratedValue Since: JPA 1.0 The Auto Generated Values article explains how to use GenerationType . Enum Constants AUTO

JPA Enum Constant in javax.persistence. GenerationType TABLE Indicates that the persistence provider must assign primary keys for the entity using an underlying database table to ensure uniqueness. Since: JPA 1.0

JPA Enum Constant in javax.persistence. GenerationType AUTO Indicates that the persistence provider should pick an appropriate strategy for the particular database. The AUTO generation strategy may expect a database resource to exist, or it may attempt to create one. A vendor may provide

JPA Enum Constant in javax.persistence. GenerationType IDENTITY Indicates that the persistence provider must assign primary keys for the entity using a database identity column. Since: JPA 1.0

JPA Enum Constant in javax.persistence. GenerationType SEQUENCE Indicates that the persistence provider must assign primary keys for the entity using a database sequence. Since: JPA 1.0

Automatically generated values are mainly useful for primary key fields, but are supported by ObjectDB also for regular (non primary key) persistent fields. At the field level, the @GeneratedValue with an optional GenerationType strategy is specified: The @GeneratedValue annotation

.persistence.GeneratedValue; import javax.persistence. GenerationType ; import javax.persistence.Id ... = GenerationType .AUTO) private Long id; private static final long serialVersionUID = 1L; @Index @OneToOne ... ; import javax.persistence.GeneratedValue; import javax.persistence. GenerationType ; import javax

= "b", allocationSize = 1) public class Parent { @Id @GeneratedValue(strategy = GenerationType .SEQUENCE ... @GeneratedValue(strategy = GenerationType .SEQUENCE, generator = "b") private int id; @ManyToOne ... = GenerationType .AUTO) private int id; @OneToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL) private OTO

.persistence.FetchType; import javax.persistence.GeneratedValue; import javax.persistence. GenerationType ... ") @GeneratedValue(strategy = GenerationType .IDENTITY) private int id; @Column(name = "username") private ... javax.persistence.GeneratedValue; import javax.persistence. GenerationType ; import javax.persistence.Id

= javax.persistence. GenerationType .TABLE, generator = "objectValueGen")   @javax.persistence ... ; @javax.persistence.GeneratedValue(strategy=javax.persistence. GenerationType .TABLE, generator ... ; @javax.persistence.GeneratedValue(strategy = javax.persistence. GenerationType .TABLE, generator

.persistence.GeneratedValue; import javax.persistence. GenerationType ; import javax.persistence.Id ... class Node { @Id     @GeneratedValue(strategy= GenerationType .IDENTITY) int id

follows: @Id @GeneratedValue(strategy = GenerationType .AUTO) private Long id; private String ... fields are as follows: @Id @GeneratedValue(strategy = GenerationType .AUTO) private Long id; private

= GenerationType .AUTO)     @Id     private long id;   ... , Convertable {     @GeneratedValue(strategy = GenerationType .AUTO)     

") @GeneratedValue(strategy = GenerationType .AUTO) private Long id; @OneToMany (fetch=FetchType.LAZY,cascade ... ; @Id @Column(name = "ID") @GeneratedValue(strategy = GenerationType .AUTO) private Long id

. GenerationType ; import javax.persistence.Id; import javax.persistence.Persistence; import javax.persistence ... ;     @GeneratedValue(strategy= GenerationType .SEQUENCE, generator="DateTime_sequence

: @Entity public class Request { public Request() { } @Id @GeneratedValue(strategy= GenerationType ... @GeneratedValue(strategy= GenerationType .IDENTITY)         private

; @GeneratedValue(strategy = GenerationType .SEQUENCE , generator = "gen") @Id private int principalId; public ... ") }) public class UserInfo implements Serializable { @GeneratedValue(strategy = GenerationType .AUTO

(strategy = GenerationType .IDENTITY). 5. Any ideas why this would happen? @Stateless ClientC ... () should just return the "long" field which is @Id @GeneratedValue(strategy = GenerationType .IDENTITY

and 36: @GeneratedValue(strategy= GenerationType .SEQUENCE)//, generator="seq") @Id @SequenceGenerator ... using the  GenerationType .SEQUENCE strategy without specifying a sequence is meaningless

_BOARD", strategy = GenerationType .SEQUENCE) lwalkowski Lukasz Walkowski Also, when I modify ... ;     @GeneratedValue(generator = "SEQ_BOARD", strategy = GenerationType .SEQUENCE

; import javax.persistence. GenerationType ; import javax.persistence.Id; import javax.persistence ... ;   @Id         @GeneratedValue(strategy= GenerationType

; @GeneratedValue(strategy = GenerationType .AUTO)     private Long id;     ... ; @GeneratedValue(strategy = GenerationType .AUTO)     private Long id;    

If I put the mappedBy element to the @OneToMany, the owned side (the many side) will never persist ! for example @Entity public class Employee { @Id @GeneratedValue(strategy = GenerationType ... ") public List addresses; } @Entity public class Address { @Id @GeneratedValue(strategy = GenerationType

(strategy = GenerationType .TABLE, generator = "sequences") // @TableGenerator(name = "sequences", initialValue = 1, allocationSize = 50) // @GeneratedValue(strategy = GenerationType .SEQUENCE

; import javax.persistence.GeneratedValue; import javax.persistence. GenerationType ; import javax ... ; @Id @GeneratedValue(strategy = GenerationType .IDENTITY) @Basic(optional = false) @Column(name = "id

= GenerationType .AUTO) private Long id; @OneToMany (fetch=FetchType.LAZY,cascade=CascadeType.ALL, mappedBy ... ") @GeneratedValue(strategy = GenerationType .AUTO) private Long id; @ManyToOne @Column(name = "VERLAG

persistence provider. Since: JPA 1.0 GenerationType strategy default AUTO (Optional) The primary key

JPA Annotation Attribute in javax.persistence.GeneratedValue GenerationType strategy default AUTO (Optional) The primary key generation strategy that the persistence provider must use to generate the annotated entity primary key. Since: JPA 1.0

: FAILS on @OneToMany with @TableGenerator/strategy = GenerationType .TABLE (www.objectdb.com

= GenerationType .SEQUENCE, generator = "sampleSeqGenerator") @Id long id;   The id field is as expected

= GenerationType .SEQUENCE, generator="user_pwd_seq")     @SequenceGenerator(name="user_pwd

instrumentation: @Entity class User implements Serializable { @Id @GeneratedValue(strategy = GenerationType

="0") public class Nodes { @Id     @GeneratedValue(strategy= GenerationType .IDENTITY

    @GeneratedValue(strategy = GenerationType .AUTO)     private Long id

@GeneratedValue (strategy = GenerationType . SEQUENCE , generator = "seq" ) private Long id

; @GeneratedValue(strategy= GenerationType .IDENTITY)     private Long id; }   Tsu

.persistence.Entity; import javax.persistence.GeneratedValue; import javax.persistence. GenerationType

In user model class I have the following: public class User implements Serializable {     @Id     @GeneratedValue(strategy = GenerationType .AUTO)     private Long id;     @ManyToMany(mappedBy = "attendees", cascade

(strategy= GenerationType .IDENTITY) Should I remove the whole db? TIA gzdillon Lai Yang Adding 

up to another element) I am using the following for the ID: @Id //@GeneratedValue(strategy = GenerationType .AUTO

Player { @Id @GeneratedValue(strategy = GenerationType .IDENTITY) public int id; @Temporal(TemporalType

for primary key: @Id @GeneratedValue(strategy= GenerationType .IDENTITY) private String ID; kiki

;   @Id     @GeneratedValue(strategy= GenerationType .TABLE, generator

@GeneratedValue(strategy= GenerationType .SEQUENCE, generator="seq") private int gid; @Index private int id

class Patient {     @Id     @GeneratedValue(strategy= GenerationType

(strategy= GenerationType .TABLE) protected Long id; @Override public Long getId() { return id ... { @Id @Column(name = "project_id") @GeneratedValue(strategy= GenerationType .TABLE) protected Long id

        @GeneratedValue(strategy = GenerationType .AUTO)    ... ; @Id         @GeneratedValue(strategy = GenerationType .AUTO

hello support, what is wrong? --- package debug ; import static java.lang . System . out ; import static javax.persistence . GenerationType . IDENTITY ; import static javax.persistence . Persistence . createEntityManagerFactory ; import java.io . File ; import java.util . List ; import javax

a bug in using @TableGenerator / GenerationType .TABLE. Fixed handling classes with no persistent fields