I have some metadata where one of the keys is an array of numbers. I
want to do a metadata query to see if the array of numbers contains
a particular number. So I create this predicate for use in a
NSMetadataQuery:
[NSPredicate predicateWithFormat:@"2 IN numberskey"];
When I run the query it complains that the right hand sign is not a
key. If I try:
it seems to rewrite the predicate to say "numberskey CONTAINS 2" and
again complains that the left hand side is not a valid key path
expression.
Does anybody know how to test an array or collection to see if it
contains a specific value using a metadata query? What is the
predicate syntax?
Thanks.
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