Re: [eclipselink-users] Null attribute classification

[Gaurav Malhotra <gaurav.malhotra@xxxxxxxxxx>]

Hi,
  I remember getting this error in the Hiberate earlier version and then
went away. I really investiaged it that time and my conclusion based was

"Exception thrown on incorrect usage of the API, such as failing to
"compile" a query object that needed compilation before execution. 
This represents a problem in our Java data access framework, not the
underlying data access infrastructure. " [This is in accordance with Rod
Johoson]

Intrestingly if I use ReadAllQuery in place of JPQL it goes away

Hence it seems there is a  problem in the Java data access framework when
using with spring and using JPQL query

[I am using Spring 2.5.5.A + eclipse link 1.0.1 + JUnit 4.4 annotation based
tx]



Carl Hall-2 wrote:
> 
> I get the following error when trying to load up my orm.xml files:
> 
> Caused by: Exception [EclipseLink-8030] (Eclipse Persistence Services -
> 1.0.1 (Build 20080905)): org.eclipse.persistence.exceptions.JPQLException
> Exception Description: Error compiling the query [select p from Poll p
> where
> p.siteId = ?1 order by p.creationDate desc], line 1, column 29: unknown
> state or association field [siteId] of class
> [org.sakaiproject.poll.model.Poll].
>     at
> org.eclipse.persistence.exceptions.JPQLException.unknownAttribute(JPQLException.java:450)
>     at
> org.eclipse.persistence.internal.jpa.parsing.DotNode.validate(DotNode.java:77)
>     at
> org.eclipse.persistence.internal.jpa.parsing.Node.validate(Node.java:91)
>     at
> org.eclipse.persistence.internal.jpa.parsing.BinaryOperatorNode.validate(BinaryOperatorNode.java:34)
>     at
> org.eclipse.persistence.internal.jpa.parsing.EqualsNode.validate(EqualsNode.java:41)
>     at
> org.eclipse.persistence.internal.jpa.parsing.WhereNode.validate(WhereNode.java:34)
> <snip/>
> 
> siteId is in my mapping definition for Poll (see below) and I don't get
> any
> errors when starting up the application just when I try to call the query
> noted above.  I've walked the code down to the point where
> TypeHelperImpl.getType(DatabaseMapping) eventually has "type =
> mapping.getAttributeClassification()" which leaves type as null.  What can
> I
> do to get this type to not be null?
> 
> Part of Poll.orm.xml:
> <entity metadata-complete="true" name="Poll"
> class="org.sakaiproject.poll.model.Poll">
>     <table name="POLL_POLL"/>
>     <attributes>
>       <id name="id">
>         <column name="POLL_ID"/>
>         <generated-value strategy="SEQUENCE"
> generator="POLL_POLL_ID_SEQ"/>
>         <sequence-generator name="POLL_POLL_ID_SEQ"
> sequence-name="POLL_POLL_ID_SEQ"/>
>       </id>
>       <basic name="owner">
>         <column name="POLL_OWNER" nullable="false"/>
>       </basic>
>       <basic name="siteId">
>         <column name="POLL_SITE_ID" nullable="false"/>
>       </basic>
>   </attributes>
> </entity>
> 
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> 
> 

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