[GreySloth]

I have a custom date column in Calibre, where I enter the last date I read a book. When a book is first entered in Calibre that date is null (or what ever it is that Calibre uses to indicate no date yet).

I figured I could either "Ignore" using .+, or "include" using ^$ and then rename from ^$ pattern to "unread" to put the new books into an "unread" collection, but I cant seem to get any books to go into the my 'unread' collection.

I suspect the plugin code is seeing 'null' and then skipping pattern matching, so when combined with my pattern to discard all non-null ... there is nothing to put in the collection.

Are my attempts to pattern match incorrect ? or is this a plugin weakness ?

Thanks