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Alex Rivera
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I have a class like this: class Foo { String bar } I am trying to get the IDs of all the Foo objects whose bar String is in the list bars . I have tried it several ways, always receiving the same error: java.lang.String cannot be cast to java.util.Collection Some of the things I have tried: def ids = Foo.findAllByBarInList( bars )*.id def ids = Foo.findAllByBarInList( bars ).collect{ it.id } def ids = Foo.findAllByBarInList( bars ).collect{ it -> it?.id } UPDATE: I was making bars with split so it was an array, not a list. It threw me off because Foo.findAllByBarInList( bars ) returned my Foo objects just fine, only when I tried to collect the ids did it fail. I now make bars with tokenize instead and all is well.
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