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https://issues.apache.org/jira/browse/CAY-1686?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrus Adamchik closed CAY-1686.
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Resolution: Fixed
Fix Version/s: 3.1M4
Done. An annoying limitation is that just like QueryChain, this query can only
return DataRows in a general case, as Cayenne runtime can only convert the
first list in QueryResponse to objects, but here we may get many lists. A
really arbitrary limitation IMO. Anyways, this can be used like this:
QueryResponse response = runtime.getContext().performGenericQuery(query);
while (response.next()) {
List<DataRow> list = (List<DataRow>) response.currentList();
// do something, e.g. convert this to a list of Persistent objects
}
> StringIdQuery - a query providing an optimized fetch for objects based on
> 1..N String IDs.
> -------------------------------------------------------------------------------------------
>
> Key: CAY-1686
> URL: https://issues.apache.org/jira/browse/CAY-1686
> Project: Cayenne
> Issue Type: Improvement
> Components: Lifecycle Extensions
> Affects Versions: 3.1M4
> Reporter: Andrus Adamchik
> Assignee: Andrus Adamchik
> Fix For: 3.1M4
>
>
> We need a query that can provide an optimized fetch for objects based on 1..N
> String IDs.
> In my projects I have a bunch of APIs that would provide me a with collection
> of String IDs that I'd like to convert to a collection of target objects
> across whatever many tables. Been doing that manually till now. Would be cool
> to encapsualte this operation in a query. BTW we have a prototype of such
> query already - org.apache.cayenne.lifecycle.relationship.ObjectIdBatchFault
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