Develop Reference

Hibernate org.hibernate.MappingException... an associon ..to unmapped class- Many toMany

I have auto generated the code using netbeans to create a Hibernate configuration; so I have two tables mapped like this (Many-to-Many) :
<hibernate-mapping auto-import="true">
<class name="com.antoiovi.jobprograms.entity.Roles" table="roles" catalog="jobprograms">
<id name="rolesName" type="string">
<column name="roles_name" length="20" />
<generator class="assigned" />
</id>
<set name="userses" table="users_roles" inverse="true" lazy="false" fetch="select" cascade="all">
<key>
<column name="role_name" length="20" not-null="true" />
</key>
<many-to-many entity-name="com.antoiovi.jobprograms.entity.Users">
<column name="user_name" length="15" not-null="true" />
</many-to-many>
</set>
</class>
<hibernate-mapping auto-import="true">
<class name="com.antoiovi.jobprograms.entity.Users" table="users" catalog="jobprograms">
<id name="idusers" type="java.lang.Integer">
<column name="idusers" />
<generator class="identity" />
</id>
<property name="userName" type="string">
<column name="user_name" length="15" not-null="true" unique="true" />
</property>
<property name="userPass" type="string">
<column name="user_pass" length="15" not-null="true" />
</property>
<property name="firstName" type="string">
<column name="first_name" length="20" />
</property>
<property name="lastName" type="string">
<column name="last_name" length="25" />
</property>
<set name="roleses" table="users_roles" inverse="true" lazy="false" fetch="select" cascade="all">
<key>
<column name="user_name" length="15" not-null="true" />
</key>
<many-to-many entity-name="com.antoiovi.jobprograms.entity.Roles">
<column name="role_name" length="20" not-null="true" />
</many-to-many>
</set>
<set name="jobprograms" table="jobprogram" inverse="true" lazy="false" fetch="select" cascade="all">
<key>
<column name="users_idusers" not-null="true" />
</key>
<one-to-many class="com.antoiovi.jobprograms.entity.Jobprogram" />
</set>
</class>
I have made some modification as you can see above (auto-import=true, lazy=false), cause i have the error message
rg.hibernate.MappingException: An association from the table users_roles refers to an unmapped class: com.antoiovi.jobprograms.entity.Roles
at org.hibernate.cfg.Configuration.secondPassCompileForeignKeys(Configuration.java:1824)
at org.hibernate.cfg.Configuration.originalSecondPassCompile(Configuration.java:1756)
at org.hibernate.cfg.Configuration.secondPassCompile(Configuration.java:1423)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1856)
The config file is
<hibernate-configuration>
org.hibernate.dialect.MySQLDialect
com.mysql.jdbc.Driver
jdbc:mysql://localhost:3306/jobprograms?zeroDateTimeBehavior=convertToNull
jobprograms_ad
xxxxx
thread
true
org.hibernate.hql.classic.ClassicQueryTranslatorFactory
true
the classes have refernce like this :
'#ManyToMany(fetch=FetchType.LAZY, mappedBy="roleses")
public Set<Users> getUserses() {
return this.userses;
} '
#ManyToMany(fetch=FetchType.EAGER)
#JoinTable(name="users_roles", catalog="jobprograms", joinColumns = {
#JoinColumn(name="user_name", nullable=false, updatable=false) }, inverseJoinColumns = {
#JoinColumn(name="role_name", nullable=false, updatable=false) })
public Set<Roles> getRoleses() {
return this.roleses;
}
wHEN RUNNING I HAVE THE ERROR org.hibernate.exception.SQLGrammarException, and in fact the entiti is loaded, but the set<> not..,
When testing the error is
org.hibernate.MappingException: An association from the table users_roles refers to an unmapped class: com.antoiovi.jobprograms.entity.Roles, and the HSQL ar not executed.
I tried to look in others post but i couldn't find an answer. Can anybody help me?
In config file the entities are all declared;
I think yhe promlem is in the mapping :
e <set name="roleses" table="users_roles" inverse="false" lazy="true" fetch="select" >
<key >
<column name="user_name" length="15" not-null="true" />
</key>
<many-to-many entity-name="test.Roles" property-ref="rolesName">
<column name="role_name" length="20" not-null="true" />
</many-to-many>
</set>
<set name="jobprograms" table="jobprogram" inverse="true" lazy="true" fetch="select">
<key>
<column name="users_idusers" not-null="true" />
</key>
<one-to-many class="test.Jobprogram" />
</set>
and
enter <class name="test.Roles" table="roles" catalog="jobprograms">
<id name="rolesName" type="string">
<column name="roles_name" length="20" />
<generator class="assigned" />
</id>
<set name="userses" table="users_roles" inverse="true" lazy="true" fetch="select">
<key property-ref="rolesName">
<column name="role_name" length="20" not-null="true" />
</key>
<many-to-many entity-name="test.Users" property-ref="userName">
<column name="user_name" length="15" not-null="true" />
</many-to-many>
</set>
</class>
....

this error
org.hibernate.MappingException: An association from the table users_roles refers to an unmapped class: com.antoiovi.jobprograms.entity.Roles
comes when hibernate configuration dont know about entity(Roles) mapping , either you have missed introducing enitity Roles to the hibernate configuration or you have not used correct name , please check configuraiton file and included com.antoiovi.jobprograms.entity.Roles as resourse

I think to have resolved the problem. Actually the proble are unmapped entities. But this happens because the database is not 'well formed'. Indeed the database ha 3 table users, users_roles, roles; the table roles has only one column as primarykey (varchar),and the table user_roles refers to it from its column user_roles; when forword enginering the ide (in the case netbeans) creates only 2 entities: 'Users', and 'Roles'; So i have re-designed the schema putting some virtual primary key, and creating unique constaint instead. Now i have 3 entities : Users,UserRoles, and Roles.

Hibernate: Mapping with one-to-many on non-primary-key columns

I'm stuck at the hibernate xml mapping configuration.
I've established some tables with foreign key constraints in my MSSQL database:
Table ItemsBase
ID int primary-key
ItemID int unique index
... some more columns
Table Others
ID int primary-key
ItemID int unique index
... some more columns
The foreign key constraint is configured to connect these two tables by using the column "ItemID".
My ItemsBase.hbm.xml files looks like:
<hibernate-mapping>
<class name="de.delife.sql.ItemsBase" table="ItemsBase" schema="dbo" catalog="Delife_Plenty">
<id name="id" type="int">
<column name="ID" />
<generator class="assigned" />
</id>
<property name="itemId" type="java.lang.Integer">
<column name="ItemID" unique="true" />
</property>
<set name="otherses" table="Others" inverse="true" lazy="true" fetch="select">
<key property-ref="itemId">
<column name="ItemID" />
</key>
<one-to-many class="de.delife.sql.Others" not-found="ignore" />
</set>
</class>
</hibernate-mapping>
and the Others.hbm.xml files looks like:
<hibernate-mapping>
<class name="de.delife.sql.Others" table="Others" schema="dbo" catalog="Delife_Plenty">
<id name="id" type="int">
<column name="ID" />
<generator class="assigned" />
</id>
<many-to-one name="itemsBase" class="de.delife.sql.ItemsBase" fetch="select" property-ref="itemId">
<column name="ItemID" unique="true" />
</many-to-one>
</class>
</hibernate-mapping>
Everything looks fine for me, but when I run my program I get a hibernate error:
property [itemId] not found on entity [de.delife.sql.Others]
I have an established relation between ItemsBase and a table named ItemsProperties and it works, but with this "pretty" table "Others" I'm stuck.
I would be glad, if someone can help me on this matter. Thx in advance.

Try like this. I tried and its working for me.
<set name="otherses" table="Others" inverse="true" lazy="true" fetch="select">
<key column="itemId" foreign-key="itemId" property-ref="itemId"/>
<one-to-many class="de.delife.sql.Others" not-found="ignore" />
</set>

Item id should be defined as a property in Others.hbm.xml:
<property name="itemId" column="ItemId"/>

How do I cascade saves through a many to many relationship with hibernate?

I have a many to many (with a join table) relationship in my database that I need to model in hibernate.
I have POJO classes for all three tables in the database as the join table contains more than just the mapping information.
My problem occurs on save() of class A where class A is told to cascade to class AB (the join table) which is told to cascade to class B, but when it gets to the point where it is saving AB the foriegn key reference to table A is null.
At the end of the day I want to be able to call save() on an instance of the TableA class and have it save all three tables.
Table Diagram
TABLE A Mapping
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Aug 27, 2012 2:16:37 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.example.dbtables.TableA" table="Table A">
<id name="id" type="int">
<column name="id" />
<generator class="sequence">
<param name="sequence">table_a_seq</param>
</generator>
</id>
<natural-id>
<property name="data1" type="int">
<column name="DATA1" not-null="true" />
</property>
<property name="data2" type="string">
<column name="DATA2" length="16" not-null="true" />
</property>
</natural-id>
<set name="tableAB" cascade="save-update" table="TableAB" inverse="true" lazy="true" fetch="select">
<key>
<column name="Table_AB_ID" not-null="true" />
</key>
<one-to-many class="com.example.dbtables.TableAB" />
</set>
</class>
</hibernate-mapping>
TABLE AB Mapping
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Aug 27, 2012 2:16:37 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.example.dbtables.TableAB" table="Table AB">
<id name="id" type="int">
<column name="id" />
<generator class="sequence">
<param name="sequence">table_ab_seq</param>
</generator>
</id>
<natural-id>
<many-to-one name="tableA" class="com.example.dbtables.TableA" fetch="select">
<column name="Table_A_ID" not-null="true" />
</many-to-one>
<many-to-one name="tableB" cascade="save-update" class="com.example.dbtables.TableB" fetch="select">
<column name="Table_B_ID" not-null="true" />
</many-to-one>
<property name="data1" type="int">
<column name="DATA1" not-null="true" />
</property>
<property name="data2" type="int">
<column name="DATA2" not-null="true" />
</property>
</natural-id>
</class>
</hibernate-mapping>
TABLE B Mapping
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Aug 27, 2012 2:16:37 PM by Hibernate Tools 3.4.0.CR1 -->
<hibernate-mapping>
<class name="com.examples.dbtables.TableB" table="Table B">
<id name="id" type="int">
<column name="id" />
<generator class="sequence">
<param name="sequence">table_b_seq</param>
</generator>
</id>
<natural-id>
<property name="data1" type="string">
<column name="DATA1" length="16" />
</property>
<property name="data2" type="java.lang.Integer">
<column name="DATA2" />
</property>
</natural-id>
<set name="TableAB" table="Table AB" inverse="true" lazy="true" fetch="select">
<key>
<column name="Table_AB_ID" not-null="true" />
</key>
<one-to-many class="com.example.dbtables.TableAB" />
</set>
</class>
</hibernate-mapping>
Thanks for any help you can give. Let me know if you need clarification or anymore information.
EDIT: My problem was that the references from AB -> to A were not getting correctly populated. This issue has been resolved thanks to everyone who helped.

A a = new A();
B b = new B();
AB ab = new AB();
ab.setA(a);
ab.setB(b);
a.setAB(ab);
b.setAB(ab);
save(a);
This example not working? Did you get some exception?
EDIT
Look into this Hibernate doc Chapter 5. Basic O/R Mapping to chapter 5.1.4.1. Generator
PostgreSQL doesn't support identity generation type.
Use sequence generation instead of identity, or something else

The problem was that the back references between AB -> A were not getting correctly populated in my code. Thanks to Ilya for the help.

Hibernate Problem Not Saving to database

I am getting a hibernate problem. I am trying with no success. I have a schema where there are Category,Attribute,AttributeOption. e.g. a category can be a 'computer', and its respective attribute can be 'RAM','Hard Disk' and e.g. 'RAM' can have attribute option '512MB','1024MB'
When I try the above schema with hibernate everything is OK.
Now I have one other requirement. A 'Category' can have many sub categories. e.g. a 'Computer' can have 'laptop' or 'Notebook' as sub categories. Now these subcategories are of the class Category themselves
then I get this scheme:
1. Category ------>Category
A category can contain many sub categories
e.g. A computer can be a notebook or laptop
2. Category ------>Attribure
A category can have many attribute
A notebook can have RAM , Hard Disk, Screen Size
3. Attribute ------>AttributeOption
An Attribute can have many attribute options
e.g. RAM can be 512 MB, 1024 MB
These are my classes without their getters and setters
Class Category:
public class Category implements IsSerializable
{
private long CategoryId;
private String CategoryName;
private Set <Category> SubCategory=new HashSet <Category> ();
private Set <Attribute> AllAttributes= new HashSet <Attribute>();
}
Category Mapping File:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 16, 2010 8:07:32 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.Models.Category" table="CATEGORY">
<id name="CategoryId" type="long">
<column name="CATEGORYID" />
<generator class="native" />
</id>
<property name="CategoryName" type="java.lang.String">
<column name="CATEGORYNAME" />
</property>
<many-to-one name="ParentCategory" class="com.BiddingSystem.Models.Category">
<column name="PARENTCATEGORYID" />
</many-to-one>
<set name="SubCategory" inverse="true" lazy="true" cascade="all" fetch="join">
<key>
<column name="PARENTCATEGORYID" />
</key>
<one-to-many class="com.BiddingSystem.Models.Category" />
</set>
<set name="AllAttributes" table="ATTRIBUTE" inverse="false" lazy="true">
<key>
<column name="CATEGORYID" />
</key>
<one-to-many class="com.BiddingSystem.Models.Attribute" />
</set>
</class>
</hibernate-mapping>
Class Attribute:
public class Attribute
{
private long AttributeId;
private String AttributeName;
private Set <AttributeOption> Options= new HashSet <AttributeOption>();
}
Attribute Mapping File:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 16, 2010 5:25:09 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.Models.Attribute" table="ATTRIBUTE">
<id name="AttributeId" type="long">
<column name="ATTRIBUTEID" />
<generator class="native" />
</id>
<property name="AttributeName" type="java.lang.String">
<column name="ATTRIBUTENAME" />
</property>
<set name="Options" table="ATTRIBUTEOPTION" inverse="false" cascade="all">
<key>
<column name="ATTRIBUTEID" />
</key>
<one-to-many class="com.BiddingSystem.Models.AttributeOption" />
</set>
</class>
</hibernate-mapping>
Class AttributeOption:
public class AttributeOption
{
private long AttributeOptionId;
private String Option;
private String SQLValue;
}
Attribute Mapping File:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 16, 2010 5:25:09 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.Models.AttributeOption" table="ATTRIBUTEOPTION">
<id name="AttributeOptionId" type="long">
<column name="ATTRIBUTEOPTIONID" />
<generator class="native" />
</id>
<property name="Option" type="java.lang.String">
<column name="OPTION" />
</property>
<property name="SQLValue" type="java.lang.String">
<column name="SQLVALUE" />
</property>
</class>
</hibernate-mapping>
I am trying the following. I am not getting any error but It is not saving the 'Laptop' which is a category of 'computer' else everything is being saved. So i think the problem is with this part from the category mapping file:
<set name="SubCategory" table="CATEGORY" cascade="all">
<key>
<column name="CATEGORYID" />
</key>
<one-to-many class="com.BiddingSystem.Models.Category" />
</set>
This is part of my program
Category C=new Category();
C.setCategoryName("Computer");
AttributeOption R512= new AttributeOption();R512.setOption("512");R512.setSQLValue("512");
AttributeOption R1024= new AttributeOption();R1024.setOption("1024");R1024.setSQLValue("1024");
Category C0= new Category();
C0.setCategoryName("Laptop");
C.getSubCategory().add(C0);
Attribute RAM= new Attribute();
RAM.setAttributeName("RAM");
RAM.getOptions().add(R512);RAM.getOptions().add(R1024);
C.getAllAttributes().add(RAM);
Transaction tx = null;
try
{
tx=session.beginTransaction();
tx.begin();
session.saveOrUpdate(C);
tx.commit();
return true;
}
catch (Exception e)
{
tx.rollback();
e.printStackTrace();
return false;
}

Something seems wrong with this:
C0.getSubCategory().add(C0);
Shouldn't it be:
C.getSubCategory().add(C0);

Hummm, I see some place for improvement in this code :
First, you should use the persist() method to persist your entities.
Second, to persist a whole object graph, you must either a) persist the sub-objects manually, then the "main" object ; or b) use the Cascade parameter on your relationships so that persisting the "main" object also triggers the persistence of the related sub-objects.
You can find more info on cascading here :
http://docs.jboss.org/hibernate/stable/core/reference/en/html/example-parentchild.html#example-parentchild-cascades

Ok, I made it to work
The key to it is the category mapping file:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Dec 16, 2010 8:37:02 AM by Hibernate Tools 3.4.0.Beta1 -->
<hibernate-mapping>
<class name="com.BiddingSystem.Models.Category" table="CATEGORY">
<id name="CategoryId" type="long">
<column name="CATEGORYID" />
<generator class="native" />
</id>
<property name="CategoryName" type="java.lang.String">
<column name="CATEGORYNAME" />
</property>
<many-to-one name="ParentCategory" class="com.BiddingSystem.Models.Category">
<column name="PARENT_CATEGORY_ID" />
</many-to-one>
<set name="SubCategory" lazy="false" cascade="all-delete-orphan" inverse="true">
<key>
<column name="PARENT_CATEGORY_ID" />
</key>
<one-to-many class="com.BiddingSystem.Models.Category" />
</set>
<set name="AllAttributes" table="ATTRIBUTE" inverse="false" lazy="true">
<key>
<column name="CATEGORYID" />
</key>
<one-to-many class="com.BiddingSystem.Models.Attribute" />
</set>
</class>
</hibernate-mapping>

Hibernate without primary keys generated by db?

I'm building a data warehouse and want to use InfiniDB as the storage engine. However, it doesn't allow primary keys or foreign key constraints (or any constraints for that matter).
Hibernate complains "The database returned no natively generated identity value" when I perform an insert.
Each table is relational, and contains a unique integer column that was previously used as the primary key - I want to keep that, but just not have the constraint in the db that the column is the primary key.
I'm assuming the problem is that Hibernate expects the db to return a generated key. Is it possible to override this behaviour so I can set the primary key field's value myself and keep Hibernate happy?
-- edit --
Two of the mappings are as follows:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jun 1, 2010 2:49:51 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="com.example.project.Visitor" table="visitor" catalog="orwell">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="identity" />
</id>
<property name="firstSeen" type="timestamp">
<column name="first_seen" length="19" />
</property>
<property name="lastSeen" type="timestamp">
<column name="last_seen" length="19" />
</property>
<property name="sessionId" type="string">
<column name="session_id" length="26" unique="true" />
</property>
<property name="userId" type="java.lang.Long">
<column name="user_id" />
</property>
<set name="visits" inverse="true">
<key>
<column name="visitor_id" />
</key>
<one-to-many class="com.example.project.Visit" />
</set>
</class>
</hibernate-mapping>
and:
<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<!-- Generated Jun 1, 2010 2:49:51 PM by Hibernate Tools 3.2.1.GA -->
<hibernate-mapping>
<class name="com.example.project.Visit" table="visit" catalog="orwell">
<id name="id" type="java.lang.Long">
<column name="id" />
<generator class="identity" />
</id>
<many-to-one name="visitor" class="com.example.project.Visitor" fetch="join" cascade="all">
<column name="visitor_id" />
</many-to-one>
<property name="visitId" type="string">
<column name="visit_id" length="20" unique="true" />
</property>
<property name="startTime" type="timestamp">
<column name="start_time" length="19" />
</property>
<property name="endTime" type="timestamp">
<column name="end_time" length="19" />
</property>
<property name="userAgent" type="string">
<column name="user_agent" length="65535" />
</property>
<set name="pageViews" inverse="true">
<key>
<column name="visit_id" />
</key>
<one-to-many class="com.example.project.PageView" />
</set>
</class>
</hibernate-mapping>

As you noted in a comment, there're many id generators you can use. E.g., you many find 'increment' convenient. Complete overview
http://docs.jboss.org/hibernate/core/3.3/reference/en/html/mapping.html#mapping-declaration-id
And hibernate won't care about your db restrictions (both primary keys and foreign keys). In fact, hibernate has no way of knowing about certain db restriction until it's violated. And if restriction doesn't exist, it can never be violated :)

You can remove the <generator class="identity" /> element and set the id manually before saving the object.