I have table CUSTOMER with id CUS_ID, and table CUSTOMER_ADD with attribute CUS_ID which is FK on CUSTOMER and attribute varchar(255) MISC. Because CUSTOMER_ADD does not have PK it must be as collection in CUSTOMER. Here is mapping Customer.hbm.xml:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "file:///C:/var/ws/ks/src/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
<class name="Customer" table="CUSTOMER">
<id name="cus_id" column="CUS_ID" type="long" unsaved-value="null">
<generator class="native" />
</id>
<list name="customerAdd" table="CUSTOMER_ADD">
<key column="CUS_ID" foreign-key="CUS_ID"></key>
<index column="CUS_ID"></index>
<one-to-many class="CustomerAdd"/>
</list>

</class>
</hibernate-mapping>

When I run from prompt "net.sf.hibernate.tool.hbm2ddl.SchemaExport --text customer.hbm.xml" I get error:

01:00:58,507 ERROR SchemaExport:310 - Error creating schema
net.sf.hibernate.MappingException: Association references unmapped class: CustomerAdd

What I am doing wrong?

Well, you have not mapped CustomerAdd. Either map it or consider using a collection of value type (http://www.hibernate.org/hib_docs/reference/html/collections.html#collections-s1-5)

Besides, why are you running SchemaExport? You have your DB allready don't you?

Thanks, works with:

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Configuration DTD//EN" "file:///C:/var/ws/ks/src/hibernate-mapping-2.0.dtd">

<hibernate-mapping>
<class name="Customer" table="CUSTOMER">
<id name="cus_id" column="CUS_ID" type="long" unsaved-value="null">
<generator class="native" />
</id>

<set name="customerAdd" table="CUSTOMER_ADD">
<key column="CUS_ID" />
<element column="MISC" type="string"/>
</set>
</class>
</hibernate-mapping>


Here is DDL:

create table CUSTOMER_ADD (CUS_ID BIGINT not null, MISC VARCHAR(255))

create table CUSTOMER (CUS_ID BIGINT not null, primary key (CUS_ID))

alter table CUSTOMER_ADD add constraint FKBFDC7CA07729A7F9 foreign key (CUS_ID) references CUSTOMER

CREATE TABLE hibernate_sequence(id NUMERIC)

Or even better, instead of set I can use bag because bag does not create PK(cus_id, misc) in CUSTOMET_ADD table.