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Predicate oddness

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Predicate oddness

Subject: Predicate oddness
From: Timothy Larkin <email@hidden>
Date: Fri, 11 Nov 2005 16:17:17 -0500

I have an NSSearchField with a set of predicates bound to an array controller. The controller's entity has a string field named title. If I want to find all the titles that have a substring "foo", the documentation and examples I have found suggest I can write "title contains[c] $value" as the predicate format in IB. Entering "foo" in the search field should produce a predicate that says, "title contains [c] 'foo'".

But it doesn't. If I print out the filter predicate in the controller's arrangeObjects method, it returns "'foo' IN title", which generates an exception.

How does the predicate format "title contains[c] $value" become "$value iN title"?


--
Timothy Larkin
Abstract Tools
Caroline, NY

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