Hibernate Field id doesn t have a default value

Question

I m facing what I think is a simple problem with Hibernate  but can t solve it  Hibernate forums being unreachable certainly doesn t help    I have a simple class I d like to persist  but keep getting   SEVERE  Field  id  doesn t have a default value Exception in thread  main  org hibernate exception GenericJDBCException  could not insert   hibtest model Mensagem      at org hibernate exception SQLStateConverter handledNonSpecificException SQLStateConverter java 103      at org hibernate exception SQLStateConverter convert SQLStateConverter java 91        a bunch more   Caused by  java sql SQLException  Field  id  doesn t have a default value       a bunch more     The relevant code for the persisted class is   package hibtest model   import javax persistence Entity  import javax persistence GeneratedValue  import javax persistence Id  import javax persistence Inheritance  import javax persistence InheritanceType    Entity  Inheritance strategy   InheritanceType JOINED  public class Mensagem        protected Long id       protected Mensagem             Id      GeneratedValue     public Long getId             return id         public Mensagem setId Long id            this id   id          return this            And the actual running code is just plain   SessionFactory factory   new AnnotationConfiguration        configure        buildSessionFactory           Session session   factory openSession        Transaction tx   session beginTransaction         Mensagem msg   new Mensagem  YARR          session save msg        tx commit        session close        I tried some  strategies  within the GeneratedValue annotation but it just doesn t seem to work  Initializing id doesn t help either   eg Long id   20L    Could anyone shed some light   EDIT 2  confirmed  messing with GeneratedValue strategy   GenerationType XXX  doesn t solve it  SOLVED  recreating the database solved the problem

User · Answer

Another suggestion is to check that you use a valid type for the auto-generated field. Remember that it doesn't work with String, but it works with Long:

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

@Constraints.Required
public String contents;

The above syntax worked for generating tables in MySQL using Hibernate as a JPA 2.0 provider.

User · Answer

I had the same problem  I found the tutorial Hibernate One-To-One Mapping Example using Foreign key Annotation and followed it step by step like below   Create database table with this script   create table ADDRESS      id INT 11  NOT NULL AUTO INCREMENT     street VARCHAR 250  NOT NULL     city  VARCHAR 100  NOT NULL     country  VARCHAR 100  NOT NULL     PRIMARY KEY  id      create table STUDENT       id            INT 11  NOT NULL AUTO INCREMENT       name          VARCHAR 100  NOT NULL       entering date DATE NOT NULL       nationality   TEXT NOT NULL       code          VARCHAR 30  NOT NULL      address id INT 11  NOT NULL      PRIMARY KEY  id       CONSTRAINT student address FOREIGN KEY  address id  REFERENCES ADDRESS  id          Here is the entities with the above tables   Entity  Table name    STUDENT   public class Student implements Serializable        private static final long serialVersionUID   6832006422622219737L        Id      GeneratedValue strategy   GenerationType IDENTITY      private int id        Entity  Table name    ADDRESS   public class Address         Id  GeneratedValue      Column name    ID       private long id      The problem was resolved    Notice  The primary key must be set to AUTO INCREMENT

User · Answer

Try to change Long object type to long primitive type  if using primitives is ok for you     I had the same problem and changing type helped me

User · Answer

Just add not-null constraint   I had the same problem  I just added not-null constraint in xml mapping  It worked   lt set name  phone  cascade  all  lazy  false   gt       lt key column  id  not-null  true    gt      lt one-to-many class  com practice phone   gt   lt  set gt

User · Answer

I tried the code and in my case the code below solve the issue  I had not settled the schema properly        Entity      Table name  table            catalog  databasename            Please try to add   catalog  databasename   the same as I did     catalog  databasename

User · Answer

Please check whether the Default value for the column id in particular table if not make it as default

User · Answer

Take a look at GeneratedValue s strategy   It typically looks something like    GeneratedValue strategy GenerationType IDENTITY

User · Answer

Dropping the table from the database manually and then re-running the application worked for me  In my case table was not created properly with constraints  I guess

User · Answer

This issue is because sometimes you need to again update create the database or sometimes if you have added the field in db table but not not entity class then it can not insert any null value or zero so this error came   So check both side Db and Entity class

User · Answer

This happened to me with a  ManyToMany relationship   I had annotated one of the fields in the relationship with  JoinTable  I removed that and used the mappedBy attribute on  ManyToMany instead

User · Answer

I came here because of the error message  turns out I had two tables with the same name

User · Answer

In my case   I altered that offending tables and the field  id  in question I made it AUTO INCREMENT  I still need to figure out why on deployment time it was not making it  AUTO INCREMENT  so that I have to do it by myself

User · Answer

What about this    lt set name  fieldName  cascade  all  gt       lt key column  id  not-null  true    gt      lt one-to-many class  com yourClass   gt   lt  set gt    I hope it helps you

User · Answer

I had the same problem   I was using a join table and all I had with a row id field and two foreign keys   I don t know the exact caused but I did the following   Upgraded MySQL to community 5 5 13 Rename the class and table Make sure I had hashcode and equals methods   Entity   Table name    USERGROUP   public class UserGroupBean implements Serializable   private static final long serialVersionUID   1L    Id  GeneratedValue strategy GenerationType AUTO   Column name    USERGROUP ID   private Long usergroup id    Column name    USER ID      private Long user id    Column name    GROUP ID   private Long group id

User · Answer

i have got such error in GCP cloud sql when model field didn t match correct table field in db  Example  when in model field is fieldName table in db should have field field name Fixing table field name helped me

User · Answer

I had this issue  My mistake was i had set the insertable and updatable fileds as false and was trying to set the field in the request  This field is set as NON NULL in DB    ManyToOne  JoinColumn name  roles id    referencedColumnName    id   insertable   false  updatable   false  nullable false   JsonBackReference private Role role    Later I changed it to - insertable   true  updatable   true    ManyToOne  JoinColumn name  roles id    referencedColumnName    id   insertable   true  updatable   true  nullable false   JsonBackReference    JsonIgnore private Role role    It worked perfectly later

User · Answer

The same exception was thrown if a DB table had an old unremoved column   For example  attribute id NOT NULL BIGINT 20   and attributeId NOT NULL BIGINT 20    After removing the not used attribute  in my case contractId  the problem was resolved

User · Answer

In addition to what is mentioned above  do not forget while creating sql table to make the AUTO INCREMENT as in this example  CREATE TABLE MY SQL TABLE      USER ID INTEGER NOT NULL AUTO INCREMENT PRIMARY KEY    FNAME VARCHAR 50  NOT NULL    LNAME VARCHAR 20  NOT NULL    EMAIL VARCHAR 50  NOT NULL

User · Answer

I had this issue  by mistake I had placed  Transient annotation above that particular attribute  In my case this error make sense

User · Answer

Sometimes changes made to the model or to the ORM may not reflect accurately on the database even after an execution of SchemaUpdate   If the error actually seems to lack a sensible explanation  try recreating the database  or at least creating a new one  and scaffolding it with SchemaExport

User · Answer

Maybe that is the problem with the table schema  drop the table and rerun the application

User · Answer

When your field is not nullable it requires a default value to be specified on table creation  Recreate a table with AUTO INCREMENT properly initialized so DB will not require default value since it will generate it by itself and never put NULL there   CREATE TABLE Persons   Personid int NOT NULL AUTO INCREMENT  LastName varchar 255  NOT NULL  FirstName varchar 255   Age int  PRIMARY KEY  Personid        https   www w3schools com sql sql autoincrement asp

User · Answer

you must be using update in your hbm2ddl property  make the changes and update it to Create so that it can create the table    lt property name  hbm2ddl auto  gt create lt  property gt    It worked for me

User · Answer

Field  id  doesn t have a default value  because you didn t declare GenerationType IDENTITY in GeneratedValue Annotation    Id  GeneratedValue strategy   GenerationType IDENTITY  private int id

User · Answer

If you want MySQL to automatically produce primary keys then you have to tell it when creating the table  You don t have to do this in Oracle   On the Primary Key you have to include AUTO INCREMENT  See the example below   CREATE TABLE  supplier           ID  int 11  NOT NULL   AUTO INCREMENT         FIRSTNAME  varchar 60  NOT NULL       SECONDNAME  varchar 100  NOT NULL       PROPERTYNUM  varchar 50  DEFAULT NULL       STREETNAME  varchar 50  DEFAULT NULL       CITY  varchar 50  DEFAULT NULL       COUNTY  varchar 50  DEFAULT NULL       COUNTRY  varchar 50  DEFAULT NULL       POSTCODE  varchar 50  DEFAULT NULL       HomePHONENUM  bigint 20  DEFAULT NULL       WorkPHONENUM  bigint 20  DEFAULT NULL       MobilePHONENUM  bigint 20  DEFAULT NULL       EMAIL  varchar 100  DEFAULT NULL      PRIMARY KEY   ID         ENGINE InnoDB DEFAULT CHARSET latin1      Here s the Entity  package com keyes jpa     import java io Serializable  import javax persistence    import java math BigInteger          The persistent class for the parkingsupplier database table           Entity  Table name    supplier   public class supplier implements Serializable     private static final long serialVersionUID   1L      Id      GeneratedValue strategy   GenerationType IDENTITY       Column name    ID     private long id      Column name    CITY     private String city      Column name    COUNTRY     private String country      Column name    COUNTY     private String county      Column name    EMAIL     private String email      Column name    FIRSTNAME     private String firstname      Column name    HomePHONENUM     private BigInteger homePHONENUM      Column name    MobilePHONENUM     private BigInteger mobilePHONENUM      Column name    POSTCODE     private String postcode      Column name    PROPERTYNUM     private String propertynum      Column name    SECONDNAME     private String secondname      Column name    STREETNAME     private String streetname      Column name    WorkPHONENUM     private BigInteger workPHONENUM     public supplier              public long getId           return this id         public void setId long id          this id   id         public String getCity           return this city         public void setCity String city          this city   city         public String getCountry           return this country         public void setCountry String country          this country   country         public String getCounty           return this county         public void setCounty String county          this county   county         public String getEmail           return this email         public void setEmail String email          this email   email         public String getFirstname           return this firstname         public void setFirstname String firstname          this firstname   firstname         public BigInteger getHomePHONENUM           return this homePHONENUM         public void setHomePHONENUM BigInteger homePHONENUM          this homePHONENUM   homePHONENUM         public BigInteger getMobilePHONENUM           return this mobilePHONENUM         public void setMobilePHONENUM BigInteger mobilePHONENUM          this mobilePHONENUM   mobilePHONENUM         public String getPostcode           return this postcode         public void setPostcode String postcode          this postcode   postcode         public String getPropertynum           return this propertynum         public void setPropertynum String propertynum          this propertynum   propertynum         public String getSecondname           return this secondname         public void setSecondname String secondname          this secondname   secondname         public String getStreetname           return this streetname         public void setStreetname String streetname          this streetname   streetname         public BigInteger getWorkPHONENUM           return this workPHONENUM         public void setWorkPHONENUM BigInteger workPHONENUM          this workPHONENUM   workPHONENUM

User · Answer

Add a method hashCode   to your Entity Bean Class and retry it

[java] Hibernate: "Field 'id' doesn't have a default value"

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