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Can a persistent class be an inner class?
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Peter
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Peter asked on 24 Nov 2009, 10:21 AM
Hi

We're implementing a persistent audit trail that has an 'audit' class alongside each domain (business) class.  I'd like to make the audit class an inner class of the domain one, but I can't find a way to set up the OpenAccess (mapping) configuration for an inner class (using the namespace and class elements).  Is it possible?  (Not a problem if it isn't).

Thanks, Peter

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Alexander
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answered on 25 Nov 2009, 09:00 AM
Hello Peter,

I am afraid this is not fully supported by the wizards but there is a chance to get it working by editing the mapping configuration manually. Could you please tell us which approach you are using - forward or reverse mapping, so we can test if it is possible and provide you with the steps to achieve it?

Regards,
Alexander
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Peter
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answered on 25 Nov 2009, 11:10 AM
Hello Alexander

We're using forward mapping (actually we generate the mapping configuration - and the persistent classes etc -  from our domain specific language), so no problem with manually setting up the configuration.

Regards, Peter
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Alexander
Telerik team
answered on 25 Nov 2009, 05:09 PM
Hi Peter,

I tested this scenario and it seems to be working fine. The configuration of the nested class is done the same way as the configuration of the outer class. The tricky part though is that in the mapping the name of the nested class is set by concatenating the two class names with a plus (+) sign. For example, if you have ClassA and ClassB (ClassB is nested in ClassA), the mapping would look like this:
<mapping id="mssqlMapping">
    <namespace name="ConsoleApplication1">
      <class name="ClassA+ClassB">
        <extension key="db-table-name" value="ClassB" />
        <!-- manually added -->
        <field name="text">
          <extension key="db-column">
            <extension key="db-column-name" value="Text" />
          </extension>
        </field>
        <!-- end -->
      </class>
      <class name="ClassA">
        <extension key="db-table-name" value="ClassA" />
        <field name="number">
          <extension key="db-column">
            <extension key="db-column-name" value="Number" />
          </extension>
        </field>
      </class>
    </namespace>
</mapping>

The limitation is that the settings for ClassB are not available in the Forward mapping wizard and should be manually added. Please find my test project attached and let us know if you face any difficulties.

Sincerely yours,
Alexander
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Peter
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answered on 25 Nov 2009, 06:41 PM
Thank you Alexander - the '+' bit was what I was missing (I couldn't find it the documentation, so you might want to add it for the next update).

Regards, Peter
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