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Posted to dev@tapestry.apache.org by "Howard M. Lewis Ship (JIRA)" <de...@tapestry.apache.org> on 2008/08/06 01:36:44 UTC
[jira] Commented: (TAPESTRY-2491) Components which use
PrimaryKeyEncoder should be changed to use ValueEncoder, and
PrimaryKeyEncoder should be eliminated.
[ https://issues.apache.org/jira/browse/TAPESTRY-2491?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12620090#action_12620090 ]
Howard M. Lewis Ship commented on TAPESTRY-2491:
------------------------------------------------
Yes but, the point of PrimaryKeyEncoder is two fold:
1) The primary key will be serialized, so the encoded value doesn't have to be a string (ValueEncoder is full encoding objects into URLs or DOM attributes).
2) PKE includes the ability to ask for a pre-load of multiple keys, which is very important scalability-wise. One database query, not N.
> Components which use PrimaryKeyEncoder should be changed to use ValueEncoder, and PrimaryKeyEncoder should be eliminated.
> -------------------------------------------------------------------------------------------------------------------------
>
> Key: TAPESTRY-2491
> URL: https://issues.apache.org/jira/browse/TAPESTRY-2491
> Project: Tapestry
> Issue Type: Improvement
> Affects Versions: 5.0.14
> Environment: any
> Reporter: Robert Zeigler
> Priority: Minor
>
> While working on an application, I noticed that my objects were being serialized "weird" into a form by the loop component. I realized that I hadn't provided the primary key encoder, and once I did things worked as expected. That got me to thinking that it would be nice if the Loop component, and other components that rely on PrimaryKeyEncoders, could check to see if there is an encoder available for the value-type, if none is explicitly bound by the user. That way, module-authors could provide PrimaryKeyEncoders that makes things work "like magic".
> For example, tapestry-hibernate could contribute PrimaryKeyEncoders for each entity type so that the objects are automatically, and properly, encoded into forms.
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