i've done a little more "research" into this and am still
(very/rather) confused! the problem doesn't appear to be related to
whether or not the predicate is compound or not. instead, it seems to
be related to whether or not the managed object context has been
saved or not and to whether or not the fetch request is constructed
programmatically or obtained from my object model. its easiest to
summarize via the following table:
context saved fetch created programmatically sorts properly
============ =========================== ============
yes yes
yes
yes no
yes
no yes
yes
no no
no
this appears to be the case even when the fetch request from within
my model contains a non-compound predicate, ie, the fetch request in
my model is the save as the one i create programmatically.
so... is there some reason why a fetch request obtained via
NSFetchRequest* request = [[[objectModel
fetchRequestTemplateForName: fn] copy] autorelease];
[request setSortDescriptors: [self defaultSortDescriptor]];
should not sort the results if the MOC hasn't yet been saved?
thanx,
ken
ps. just to add to the confusion, for case 4 above (where the context
has not been saved), if i set the enitity and predicate of my
programmatically created fetch request to the entity and predicate
obtained from the request obtained from my model, it sorts properly!
At 5:34 PM -0800 3/12/06, Ken Victor wrote:
if i use the following fetch request, i get back what i consider to
be a properly sorted array:
(entity: TaxCategory; predicate: (wasDeleted == 0); sortDescriptors:
((accountsId, ascending, compare:)); limit: 0)
however, the following fetch request, with a compound predicate,
doesn't sort the resulting array:
(entity: TaxCategory; predicate: (name != 0 AND name MATCHES
"^\\S.*" AND name MATCHES ".*\\S$" AND wasDeleted == 0);
sortDescriptors: ((accountsId, ascending, compare:)); limit: 0)
note that both requests DO return the proper set, its just that the
result of the request with a compound predicate isn't sorted. i
can't swear to this, but i believe this used to work prior to
uprading to 10.4.5.
can anyone shed some light on this for me?
thanx,
ken
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