[
https://issues.apache.org/jira/browse/CAY-1902?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13910572#comment-13910572
]
Andrus Adamchik edited comment on CAY-1902 at 2/24/14 5:51 PM:
---------------------------------------------------------------
[~johnthuss] Yeah, I guess if we have a multi-step path, fetch is unavoidable.
But wonder if we can avoid a cast to DataContext and a call to
objectStore.getCachedSnapshot(oid) (this can return null - the underlying cache
is an LRU after all, and can overflow and lose some snapshots).
For multi-step paths, I would probably just reverse the entire path (by going
through each component and doing DbRelationship.createReverseRelationship(..))
and build a single query.
was (Author: andrus):
[~johnthuss] Yeah, I guess if we have a multi-step path, fetch is unavoidable.
But wonder if we can avoid a cast to DataContext, a call to
objectStore.getCachedSnapshot(oid) (this can return null - the underlying cache
is an LRU after all, and can overflow and lose some snapshots).
For multi-step paths, I would probably just reverse the entire path (by going
through each component and doing DbRelationship.createReverseRelationship(..))
and build a single query.
> Implement resolving Db paths for DataObjects
> --------------------------------------------
>
> Key: CAY-1902
> URL: https://issues.apache.org/jira/browse/CAY-1902
> Project: Cayenne
> Issue Type: Improvement
> Components: Core Library
> Affects Versions: 3.2.M2
> Reporter: John Huss
> Assignee: John Huss
> Priority: Minor
> Fix For: 3.2.M2
>
> Attachments: 0001-Implement-db-path-evaluation-in-memory.patch
>
>
> Expressions using db paths don't support in-memory evaluation against
> DataObjects (there is a TODO in the code).
--
This message was sent by Atlassian JIRA
(v6.1.5#6160)
