How to persist inheritance with attributes

[Nobody/Anonymous]

Hi,

I've tried to persist inheritance by using attributes, but I dont know how to use it correct:

My SUPERCLASS:

[AFTable("MyBusinessObjects", "Test", AFTableAttribute.KeyType.useOIDValue,
         OIDColumn="oid",         CreatedTimestamp="CreatedDate",         ModifiedTimestamp="ModifiedDate")]
    public class MyBusinessObject : CPersistentObject
    {...}

SUBCLASS:

[AFTable("MyBusinessObjects",
"Test",
AFTableAttribute.KeyType.useOIDValue,
OIDColumn="oid",
SuperClass=typeof(MyBusinessObject),
KeyReference="OIDValue",             SharedTableField="IType",             SharedTableValue="1")]
public class MyBusinessObject1 : MyBusinessObject
{...}

Is there something wrong?? because I get the error:
"Object reference not set to an instance of an object."

Thanks and Regards
Lene
   

[Richard Banks]

Hi Lene,

The code looks OK at first glance.  Have you isolated the line of code that actually causes the error?

- Richard.

[Nobody/Anonymous]

Hi Richard,

the error occurs in CPersistentBroker Reflect(..) :

"If Not afTable.KeyReference Is Nothing And Not afTable.SuperClass Is Nothing Then
                            refAttr = ClassMap.SuperClass.getAttributeMapByString(afTable.KeyReference, True)..."

But ClassMap.Superclass instance is not set yet(= nothing)
-> Error:"Object reference not set to an instance of an object."

Lene

[Richard Banks]

Ah.  Got it :-)

Please get the latest version of CPersistenceBroker from CVS and try that.  It should be OK now.

Please note that the public CVS takes a little while to update.