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Re: [eclipselink-users] Exception on using VariableOneToOneannotation
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Hi Chris,
I am able to persists the SourceEntity with no CacadeType and PrivateOwned
annotation as this was trying to insert Target table that I don't want. Now
I am having trouble while fetching the SourceEntity. The SourceEntity is
having null value for foreignEnity.
Thanks,
Kiran
Kiran Kumar Gubbi wrote:
>
> Hi Chris,
>
> Thanks for your help. The issue was columnDefinition of the
> discriminatorColumn. I changed that to 'name', now it is fine. I have the
> same issue which James has explained. I am using two separate attributes
> one for FORIEGN_ID and other one for FOREING_CLASS_TYPE both insertable +
> updatable set to false. I hope there won't be any further issue on this.
>
> Thanks,
> Kiran
>
>
>
>
> christopher delahunt wrote:
>>
>> Hello Kiran,
>>
>> Only potential problems I can see in your mapping is that the spelling
>> of foreign is different in your join column from everywhere else.
>>
>> The exception implies you are trying to execute a query - are there any
>> problems persisting or reading in entities? If the only problem you
>> have is queries, the exception states queries over over VariableOneToOne
>> mappings are not supported. James answers a similar question in the
>> Eclipselink forum at:
>> http://www.eclipse.org/forums/index.php?t=msg&goto=537838&#msg_537838
>>
>>
>> Regards,
>> Chris
>>
>> On 30/11/2010 10:48 AM, Kiran Kumar Gubbi wrote:
>>> Hi Chirs,
>>> I have changed my code to use @VariableOneToOne annotation instead of
>>> Customizer. But I am getting the following exception.
>>>
>>> 'Mapping:
>>> [org.eclipse.persistence.mappings.VariableOneToOneMapping[foreignEntity]]
>>> at
>>> org.eclipse.persistence.exceptions.QueryException.cannotQueryAcrossAVariableOneToOneMapping(QueryException.java:405)'
>>>
>>> My annotation details are
>>>
>>> @VariableOneToOne( targetInterface = EntityInterface.class,
>>> discriminatorColumn =
>>> @DiscriminatorColumn(
>>> columnDefinition = "FOREING_CLASS_TYPE",
>>> discriminatorType = DiscriminatorType.STRING ),
>>> discriminatorClasses = {
>>> @DiscriminatorClass( discriminator = "TargetTable1", value =
>>> TargetTable1.class ),
>>> @DiscriminatorClass( discriminator = "TargetTable2", value =
>>> TargetTable2.class )
>>> },
>>> fetch = FetchType.LAZY
>>> )
>>> @JoinColumn( name = "FORIENG_ID", referencedColumnName = "id" )
>>> @PrivateOwned
>>> private EntityInterface foreignEntity;
>>>
>>> I hope there might be some error in my annotation.
>>>
>>> Thanks,
>>> Kiran
>>>
>>>
>>>
>>> christopher delahunt wrote:
>>>
>>>> Hello Kiran,
>>>>
>>>> You have the foreignEntity attribute mapped twice; once when you add
>>>> the @VariableOneToOne() annotation, and the second is when you add the
>>>> customizer code to create the new VariableOneToOneMapping.
>>>> Since the annotation has nothing defined, it will use the default
>>>> fields
>>>> - FOREIGNENTITY_ID for the foreign key, and DTYPE for the type field.
>>>>
>>>> Map the column entirely through annotations, or look up the mapping on
>>>> the descriptor in the customizer instead of creating a new one. ie
>>>> descriptor.getMapping("foreignEntity")
>>>>
>>>> Regards,
>>>> Chris
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 29/11/2010 5:11 AM, Kiran Kumar Gubbi wrote:
>>>>
>>>>> Hi Chris,
>>>>>
>>>>> After correcting the customizer I am not getting exception on server
>>>>> start
>>>>> up. But while on page loading I am getting ' java.sql.SQLException:
>>>>> ORA-00904: "T1"."DTYPE": invalid identifier ' exception. My source
>>>>> class
>>>>> is
>>>>> having the foreignClassType and foreignId which are set insertable +
>>>>> updatable as 'false' (This fields are very much required as our JPQL
>>>>> uses
>>>>> this fields in where clause). But when I see in the server log it
>>>>> seems
>>>>> the
>>>>> sql is having two new column t1.FOREIGNENTITY_ID , t1.DTYPE which I
>>>>> have
>>>>> not defined in my entity.
>>>>>
>>>>> To make further clear I am giving my lates entity and customizer
>>>>> details
>>>>>
>>>>> @Entity
>>>>> @Table( name = "SourceTable" )
>>>>> @Customizer( SourceCustomizer.class )
>>>>> public class SourceTable
>>>>> {
>>>>>
>>>>> @Column( name = "SOURCE_ID", nullable = false, unique = true )
>>>>> private Integer id;
>>>>>
>>>>> @VariableOneToOne()
>>>>> private EntityInterface foreignEntity;
>>>>>
>>>>> @Column( name = "FORIENG_ID", nullable = false, insertable = false,
>>>>> updatable = false )
>>>>> private Integer foreignId;
>>>>>
>>>>> @Column( name = "FOREING_CLASS_TYPE", nullable = false, insertable =
>>>>> false,
>>>>> updatable = false )
>>>>> private String foreignClassType;
>>>>>
>>>>> // atttribute setter and getter method
>>>>>
>>>>> }
>>>>>
>>>>> My DescriptorCustomizer detail is
>>>>>
>>>>> public class SourceCustomizer implements DescriptorCustomizer {
>>>>> public void customize( final ClassDescriptor descriptor ) {
>>>>> VariableOneToOneMapping variableOneToOneMapping = new
>>>>> VariableOneToOneMapping();
>>>>> variableOneToOneMapping.setAttributeName( "foreignEntity" );
>>>>> variableOneToOneMapping.setReferenceClass( EntityInterface.class );
>>>>> variableOneToOneMapping.setForeignQueryKeyName(
>>>>> "SourceTable.FORIENG_ID",
>>>>> "id" );
>>>>> variableOneToOneMapping.setTypeFieldName(
>>>>> "SourceTable.FOREING_CLASS_TYPE" );
>>>>> // configure class indicators
>>>>> variableOneToOneMapping.addClassIndicator( TargetTable1.class,
>>>>> "TargetTable1" );
>>>>> variableOneToOneMapping.addClassIndicator(
>>>>> TargetTable2.class,"TargetTable2" );
>>>>> variableOneToOneMapping.dontUseIndirection();
>>>>> variableOneToOneMapping.privateOwnedRelationship();
>>>>>
>>>>> // add mapping to descriptor
>>>>> descriptor.addMapping( variableOneToOneMapping );
>>>>> }
>>>>> }
>>>>>
>>>>> Any suggestion is very helpfull.
>>>>>
>>>>> Thanks,
>>>>> Kiran
>>>>>
>>>>>
>>>>>
>>>>> christopher delahunt wrote:
>>>>>
>>>>>
>>>>>> yes, that was only part of the problem. The other part is you are
>>>>>> using
>>>>>> the setForeignQueryKeyName incorrectly.
>>>>>> The method signature is addForeignQueryKeyName(String
>>>>>> sourceForeignKeyFieldName, String targetQueryKeyName)
>>>>>> where as you are passing in two fields - the second parameter should
>>>>>> be
>>>>>> a query key, not a database field. It should look something like:
>>>>>> variableOneToOneMapping.setForeignQueryKeyName(
>>>>>> "SourceTable.FORIENG_ID", "queryKeyName");
>>>>>>
>>>>>> The "queryKeyName" must be a query key in the target variable
>>>>>> descriptor that will be mapped to the primary key in the hard
>>>>>> implementation descriptors.
>>>>>> So it will need to be mapped to "TargetTable1.T1_ID" and
>>>>>> "TargetTable2.T2_ID" depending on the concrete class the
>>>>>> discriminator
>>>>>> indicates.
>>>>>>
>>>>>> Variable mappings are described at:
>>>>>> http://wiki.eclipse.org/Configuring_a_Relational_Variable_One-to-One_Mapping_(ELUG)
>>>>>>
>>>>>> Best Regards,
>>>>>> Chris
>>>>>>
>>>>>> On 26/11/2010 9:47 AM, Kiran Kumar wrote:
>>>>>>
>>>>>>
>>>>>>> Hello Chris,
>>>>>>>
>>>>>>> Even after removing 'foreignId' attribute from the 'SourceEntity'
>>>>>>> still
>>>>>>> getting the exception saying 'Only one may be defined as writable,
>>>>>>> all
>>>>>>> others must be specified read-only'. I have a doubt is it because of
>>>>>>> 'setForeignQueryKeyName' in SourceCustomizer class using twice to
>>>>>>> set
>>>>>>> the foreign_id to the primary key of TargetTable1 and TargetTable2.
>>>>>>>
>>>>>>> Thanks,
>>>>>>> Kiran
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> -----Original Message-----
>>>>>>> From: eclipselink-users-bounces@xxxxxxxxxxx
>>>>>>> [mailto:eclipselink-users-bounces@xxxxxxxxxxx] On Behalf Of
>>>>>>> Christopher
>>>>>>> Delahunt
>>>>>>> Sent: 26 November 2010 13:19
>>>>>>> To: EclipseLink User Discussions
>>>>>>> Subject: Re: [eclipselink-users] Exception on using
>>>>>>> VariableOneToOneannotation
>>>>>>>
>>>>>>> Hello Kiran,
>>>>>>>
>>>>>>> Yes, as the exception states, you have the "SourceTable.FORIENG_ID"
>>>>>>> mapped twice - the first being the foreignId mapping, and the second
>>>>>>> in
>>>>>>> the foreignEntity mapping.
>>>>>>> Only 1 can be writable; the others need to be set to read-only (or
>>>>>>> insertable+updatable =false ). Otherwise, should they ever be set
>>>>>>> differently, there is no way to tell which one
>>>>>>> should be written to the database.
>>>>>>>
>>>>>>> Best Regards,
>>>>>>> Chris
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> On 26/11/2010 5:17 AM, Kiran Kumar Gubbi wrote:
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>> While on start of the application server I am getting the eclispe
>>>>>>>> link
>>>>>>>> exception saying 'Only one may be defined as writable, all others
>>>>>>>> must
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> be
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> specified read-only.'. My table and the code detail is given below.
>>>>>>>>
>>>>>>>> SourceTable - ID, FOREING_CLASS_TYPE , FORIENG_ID
>>>>>>>>
>>>>>>>> TargetTable1 - T1_ID
>>>>>>>> TargetTable2 - T2_ID
>>>>>>>>
>>>>>>>> The source table FORIENG_ID is foreing key to TagergetTable1.T1_ID
>>>>>>>> and
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> TargetTable2.T2_ID.
>>>>>>>>
>>>>>>>>
>>>>>>>> My DescriptorCustomizer detail is
>>>>>>>>
>>>>>>>> public class SourceCustomizer implements DescriptorCustomizer
>>>>>>>> {
>>>>>>>> public void customize( final ClassDescriptor descriptor )
>>>>>>>> {
>>>>>>>> VariableOneToOneMapping variableOneToOneMapping = new
>>>>>>>> VariableOneToOneMapping();
>>>>>>>> variableOneToOneMapping.setAttributeName( "foreignEntity" );
>>>>>>>> variableOneToOneMapping.setReferenceClass(
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> EntityInterface.class );
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> variableOneToOneMapping.setForeignQueryKeyName(
>>>>>>>> "SourceTable.FORIENG_ID", "TargetTable1.T1_ID"
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> );
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> variableOneToOneMapping.setForeignQueryKeyName(
>>>>>>>> "SourceTable.FORIENG_ID", "TargetTable2.T2_ID"
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> );
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> variableOneToOneMapping.setTypeFieldName( "SourceTable
>>>>>>>> .FOREING_CLASS_TYPE" );
>>>>>>>>
>>>>>>>> // configure class indicators
>>>>>>>> variableOneToOneMapping.addClassIndicator(
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> TargetTable1.class,
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> "TargetTable1" );
>>>>>>>> variableOneToOneMapping.addClassIndicator( TargetTable2
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> .class,
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>>> "TargetTable2" );
>>>>>>>>
>>>>>>>> variableOneToOneMapping.dontUseIndirection();
>>>>>>>> variableOneToOneMapping.privateOwnedRelationship();
>>>>>>>>
>>>>>>>> // add mapping to descriptor
>>>>>>>> descriptor.addMapping( variableOneToOneMapping );
>>>>>>>> }
>>>>>>>> }
>>>>>>>>
>>>>>>>> My entity has the VariableOntoOne mapping like the one mention
>>>>>>>> below.
>>>>>>>>
>>>>>>>>
>>>>>>>> @Entity
>>>>>>>> @Table( name = "SourceTable" )
>>>>>>>> @Customizer( SourceCustomizer.class )
>>>>>>>> public class SourceTable
>>>>>>>> {
>>>>>>>>
>>>>>>>> @VariableOneToOne()
>>>>>>>> private EntityInterface foreignEntity;
>>>>>>>>
>>>>>>>> @Column( name = "FORIENG_ID", nullable = false )
>>>>>>>> private Integer foreignId;
>>>>>>>>
>>>>>>>> }
>>>>>>>>
>>>>>>>> is there anything I am missing in this ?
>>>>>>>>
>>>>>>>> Thanks,
>>>>>>>> Kiran
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> eclipselink-users mailing list
>>>>>>> eclipselink-users@xxxxxxxxxxx
>>>>>>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>> _______________________________________________
>>>>>> eclipselink-users mailing list
>>>>>> eclipselink-users@xxxxxxxxxxx
>>>>>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>> _______________________________________________
>>>> eclipselink-users mailing list
>>>> eclipselink-users@xxxxxxxxxxx
>>>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>>>
>>>>
>>>>
>>>
>>>
>>
>> _______________________________________________
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>> eclipselink-users@xxxxxxxxxxx
>> https://dev.eclipse.org/mailman/listinfo/eclipselink-users
>>
>>
>
>
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