Hi André and Chuck,
I asked my wife about invalidating the relationship cache.
She looked at me and said:
“Love is grand, divorce is 100 grand”
I would:
1) create a fetch specification
2) set “refreshesRefetchedObjects()” to true.
3) set up a prefetch path that traverses to the second objects.
Then use the editing context to fetch.
EOQualifier identityQualifier = {set this up yourself}
EOFetchSpecification fetchSpec = new EOFetchSpecification(YourEO.ENTITY_NAME,
identityQualifier, null /*sortOrderings*/);
fetchSpec.setRefreshesRefetchedObjects(true);
fetchSpec.setPrefetchingRelationshipKeyPaths(new NSArray<String>(
YourEO.RELATIONSHIP_NAME.dot(OtherEO.RELATIONSHIP_NAME).key()
)
);
editingContext.objectsWithFetchSpecification(fetchSpec);
NOTE: Your identity qualifier might be like so:
EOEntity entity = EOUtilities.entityForObject(yourEO.editingContext(), yourEO);
EOKeyGlobalID globalID = (EOKeyGlobalID)
eo.editingContext().globalIDForObject(eo);
NSDictionary<String, Object> primaryKey =
entity.primaryKeyForGlobalID(globalID);
EOQualifier identityQualifier = entity.qualifierForPrimaryKey(primaryKey);
profit - save yourself 100 grand.
AARON ROSENZWEIG / Chat 'n Bike <http://www.chatnbike.com/>
e: [email protected] <mailto:[email protected]> t: (301) 956-2319
> On Mar 5, 2018, at 2:24 PM, Chuck Hill <[email protected]> wrote:
>
> Hi André,
>
> Invalidating the GlobalIds won’t work. That will just refresh the objects
> that you have a list of already. From your description, I think that you
> want to refresh what is in list (get an updated list with inserted and
> deleted rows that match the databse). This should work
> ERXEOControlUtilities. clearSnapshotForRelationshipNamed(eo, " extWsProjects
> ");
>
> Following that you many need to refault the objects in the relationship.
>
>
>
> On 2018-03-05, 8:31 AM, "Webobjects-dev on behalf of André Rothe"
> <[email protected]
> <mailto:[email protected]> on behalf
> of [email protected] <mailto:[email protected]>>
> wrote:
>
> Hi,
>
> I have an EO with a relationship to a second EO. The database in the
> background will be changed by another application, so it will be
> necessary to refetch the associated EOs of the relationship on every
> access.
>
> How I can invalidate the list of the associated EOs?
>
> This is the generated method (EOGenerator):
>
> public NSArray<ExtWsProject> extWsProjects() {
> // TODO: invalidate this array
> return (NSArray<ExtWsProject>)storedValueForKey("extWsProjects");
> }
>
> On the page
>
> https://en.wikibooks.org/wiki/WebObjects/EOF/Using_EOF/Caching_and_Freshness
>
> I read something from Jesse Barnum, should I get all the ExtWsProject
> objects and their GIDs to call ec.invalidateObjectsWithGlobalIDs(ids) to
> make faults?
>
> But what about deleted rows in the database, the other application can
> also delete rows, so the faults should not be necessary?
>
> Thanks a lot
> Andre
>
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