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Open JPA query with One to Many Relation

Posted on 2009-04-02
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Last Modified: 2013-12-07
How to fetch data from a child table by querying on parent table in openjpa which is One-to-Many Relationship.
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Question by:vkchaitu82
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kingsob earned 500 total points
ID: 24110032
here is a query what will select all children for a parent

select p from Parent p join fetch p.children where p.id = :id

you could then display a list of the children in jsf with something like this (assuming the child table had a column called name)

<h:dataTable "#{bean.parent.children}" var="child">
    <h:column>
        <h:outputText value="#{child.name}"/>
    </h:column>
</h:dataTable>

you would also need a getter in your bean for the public Parent getParent();


if you were to post your two entity's for the parent and child, i could be more specific to your needs


Derek
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