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POHibernate hbm many to many mapping
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  1. POHibernate hbm many to many mapping
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    copied!<p>I am trying to create a one-to-many mapping between 2 objects (work with Java). I am able to save the objects in the database, but not their relationship. I have a class called "AuthorizationPrincipal" and it contains a set of "Privileges"</p> <pre><code>&lt;?xml version="1.0"?&gt; &lt;!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" &gt; &lt;hibernate-mapping package="org.openmrs"&gt; &lt;class name="AuthorizationPrincipal" table="authorization_principal" lazy="false"&gt; &lt;id name="authorizationPrincipalId" type="int" column="authorization_principal_id" unsaved-value="0" &gt; &lt;generator class="native" /&gt; &lt;/id&gt; &lt;discriminator column="authorization_principal_id" insert="false" /&gt; &lt;property name="name" type="java.lang.String" column="name" unique="true" length="38"/&gt; &lt;many-to-one name="creator" class="org.openmrs.User" not-null="true" /&gt; &lt;property name="uuid" type="java.lang.String" column="uuid" length="38" unique="true" /&gt; &lt;property name="dateCreated" type="java.util.Date" column="date_created" not-null="true" length="19" /&gt; &lt;property name="policy" type="java.lang.String" column="policy" not-null="true" length="255" /&gt; &lt;!-- Associations --&gt; &lt;set name="privileges" inverse="true" cascade="" table="authorization_principal_privilege" &gt; &lt;key column="authorization_principal_id" not-null="true"/&gt; &lt;many-to-many class="Privilege"&gt; &lt;column name="privilege" not-null="true" /&gt; &lt;/many-to-many&gt; &lt;/set&gt; &lt;/class&gt; </code></pre> <p></p> <p>I came up with the "set" tag by following through a few tutorials and examples, but it still won't save in the database. </p>
 

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