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Derived count

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Derived count

Subject: Derived count
From: Lachlan Deck <email@hidden>
Date: Fri, 9 Feb 2007 10:32:39 +1100

Hi there,

For some time now we've been using the technique of defining a non- class property in the model called "derivedCount" with it's definition as count(*).

Works great. e.g.,

EOEditingContext ec; // assume exists
EOFetchSpecification fetchSpec; // assume exists
NSArray results;

fetchSpec.setRawRowKeyPaths( new NSArray( "derivedCount" ) );
results = ec.objectsWithFetchSpecification( rawFetchspecification );

My question is, would this work equally well with the shared editing context using the readerLocking?

with regards,
--

Lachlan Deck

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