Hi James,
You do it in the query source delegate.
You get your original query and then add whatever magic you need to do in the
delegate.
public class WorkingGroupProjectsQueryDataSourceDelegate implements
ERDQueryDataSourceDelegateInterface {
public EODataSource queryDataSource(ERD2WQueryPage sender) {
EODataSource ds = sender.dataSource();
if (ds == null || !(ds instanceof EODatabaseDataSource)) {
ds = new EODatabaseDataSource(sender.session().defaultEditingContext(),
sender.entity().name());
sender.setDataSource(ds);
}
EOFetchSpecification fs = ((EODatabaseDataSource) ds).fetchSpecification();
// this is the line where you are getting your combined
// qualifier from the private method below
fs.setQualifier(qualifierFromSender(sender));
fs.setIsDeep(sender.isDeep());
fs.setUsesDistinct(sender.usesDistinct());
fs.setRefreshesRefetchedObjects(sender.refreshRefetchedObjects());
int limit = sender.fetchLimit();
if (limit != 0) {
fs.setFetchLimit(limit);
}
NSArray prefetchingRelationshipKeyPaths =
sender.prefetchingRelationshipKeyPaths();
if (prefetchingRelationshipKeyPaths != null &&
prefetchingRelationshipKeyPaths.count() > 0) {
fs.setPrefetchingRelationshipKeyPaths(prefetchingRelationshipKeyPaths);
}
return ds;
}
private EOQualifier qualifierFromSender(ERD2WQueryPage sender) {
WorkingGroup wg = WorkingGroup.wg();
EOQualifier q = Project.WORKING_GROUP.eq(wg).and(sender.qualifier());
return q;
}
the .and(sender.qualifier()); in the qualifierFromSender method is whatever
your page produces before passing it to the delegate. Here I am just ensuring
that the projects listed in a project query page were created by the working
group of the logged in user + whatever search criteria were entered on the
query page.
David
On 2012-02-07, at 7:44 AM, James Cicenia wrote:
> Ok -
>
> As i replaced my custom QueryPage with one out of the wonder box I am a bit
> confused as usual.
>
> I understand queryDataSourceDelegate.
>
> I needed that for manipulating the qualifiers... ok, so far so good.
>
> In my Query I have a custom component that lists ERTags they can search on.
> However, that search
> can't be combined with the qualifier based search. I retrieve them from the
> displayGroup's queryMatch
> dictionary, and then get the entities associated with the array of tags. I
> would then Intersect this set
> of entities with those retrieved by the qualifier based query.
>
> The question then becomes how can I do this with just pure D2W delegate /
> rule interfaces?
> OR,
> Where do I put the code to merge the two results sets?
>
> Thanks
>
> James
>
>
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