Hibernate Bi Directional Problem

[Anna Madhusudhanan Natanagopalan]

Hi ,
I am facing a problem in hibernate bidirectional. I have 2 classes TOrder and LineItem.

What is the problem in the xml file. Is this correct? Or do i need to create the seperate xml file ?

for Bi directional i created the Ora.hbm.xml as

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping SYSTEM "http://hibernate.sourceforge.net/hibernate-mapping-2.0.dtd" >
<hibernate-mapping>
<class name="com.bo.TOrder" table="T_ORDER">
<id name ="orderID" type="int">
<column name="ORDERID" not-null="true"/>
<generator class="hilo"/>
</id>
<property column="userName" name="userName" />
<property column="total" name="total" />
<set name="lineItem" inverse="true" lazy="true" cascade="all">
<key column="orderID"/>
<one-to-many class="com.bo.LineItem"/>
</set>
</class>

<class name="com.hibernate.example.bo.LineItem" table="T_LINEITEM">
<id type="int">
<column name="ID" not-null="true"/>
<generator class="hilo"/>
</id>
<property column="itemName" name="itemName" />
<property column="unitPrice" name="unitPrice" />
<property column="discount" name="discount" />
<many-to-one name="order" class="com.bo.TOrder" column="orderID"/>
</class>
</hibernate-mapping>


Thanks in Advance
Anna Madhusudhanan

[Lasse Koskela]

The <key/> element in the <set/> should name the column in the "other" table that holds a reference to "this" table's ID.

I.e. something like:

<class name="TOrder" table="T_ORDER">
<id name="orderID" type="int">
<column name="ORDERID" not-null="true"/>
<generator class="hilo"/>
</id>
<property column="userName" name="userName" />
<property column="total" name="total" />
<set name="lineItem" inverse="true" lazy="true" cascade="all">
<key column="ORDERID"/>
<one-to-many class="com.bo.LineItem"/>
</set>
</class>
 
<class name="LineItem" table="T_LINEITEM">
<id type="int">
<column name="ID" not-null="true"/>
<generator class="hilo"/>
</id>
<property column="itemName" name="itemName" />
<property column="unitPrice" name="unitPrice" />
<property column="discount" name="discount" />
<many-to-one name="order" class="TOrder" column="ORDERID"/>
</class>

[Lasse Koskela]

Oh, wait. That's exactly how you had it. Hmm.

[David Harkness]

Originally posted by Anna Madhusudhanan Natanagopalan:
I am facing a problem in hibernate bidirectional. I have 2 classes TOrder and LineItem.

Would you care to share it with us? What exactly is the problem? Does Hibernate give you an error when reading the mapping files? Do you get a runtime error when loading objects?

[Anna Madhusudhanan Natanagopalan]

I am getting error at run time.

[Lasse Koskela]

Do you have a stack trace to give us? Otherwise it's rather difficult to get an idea of what's happening.