Hi, By default, collection-based relationships (ie. one-to-many) are lazily fetched. That means that they will not be included in a query of the entity containing this relationship. You either need to touch that collection filed or change the fetch mode to Eager.
Kevin On Wed, Feb 22, 2012 at 3:38 AM, aabbcc (Created) (JIRA) <[email protected]>wrote: > One-To-Many mapping is not working > ---------------------------------- > > Key: OPENJPA-2138 > URL: https://issues.apache.org/jira/browse/OPENJPA-2138 > Project: OpenJPA > Issue Type: Bug > Components: jpa > Affects Versions: 2.1.1 > Reporter: aabbcc > > > I have business object model with below structure > > Class A { > private B b; > > } > > Class B { > private String joinKey; > private List<C> c; > } > > Class C { > private String joinKey; > private String str1; > private String str2; > } > > In the ORM.xml,I have specified mapping like this > > <entity class="xxx.xxx.A"> > <table name="table1"/> > <attributes> > <one-to-one name="name1" target-entity="xxx.xxx.B"> > <join-column name='"column1"' referenced-column-name='"column1"'/> > </one-to-one> > </attributes> > </entity> > > <entity class="xxx.xxx.B"> > <table name="table2"/> > <attributes> > <basic name="joinKey"> > <column name="column1"/> > </basic> > <one-to-many name="name1" target-entity="xxx.xxx.C"> > <join-column name='"column1"' referenced-column-name='"column1"'/> > </one-to-many> > </attributes> > </entity> > > <entity class="xxx.xxx.C"> > <attributes> > <basic name="joinKey"> > <column name="column1"/> > </basic> > <basic name="str1"> > <column name="str1Column"/> > </basic> > <basic name="str2"> > <column name="str2Column"/> > </basic> > </attributes> > > </entity> > > > The one-to-many mapping specified in the entity C does not work by both > approach 1) JoinColumn 2) JoinTable. My code skips this mapping while > generating SQL query. > But instead of one-to-many mapping If I specify one-to-one mapping and > change class B to replace "private List<C> c;" with "private C c;" then the > one-to-one mapping works fine. > > I am using OPENJpa 2.1.1, as per the documentation one-to-many mapping > should work but it seems OPENJpa 2.1.1 API is working as expected. It seems > there is bug in API. > > Can you please advise to fix this issue? > > -- > This message is automatically generated by JIRA. > If you think it was sent incorrectly, please contact your JIRA > administrators: > https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa > For more information on JIRA, see: http://www.atlassian.com/software/jira > > >
