|01-01-2013, 10:47 PM||#1|
Join Date: Dec 2012
Device: Kindle 4, Kindle for Android
Template/Regular Expression Trouble
I'm using a custom column to work with the Kindle Collections plugin. It collects author names in three groups ("A-I", "J-Q" and "S-Z"). A fourth ("other") is reserved for authors who might call themselves something like 123foo or $bar.
The following code worked fine so far...
program: author_first_letter = substr(field('author_sort'), 0, 1); group = switch(author_first_letter, '[A-I]', 'A-I', '[J-R]', 'J-R', '[S-Z]', 'S-Z', 'other'); strcat('Authors ', group)
...until Karel Čapek came along.
His books should be found in the "A-I" collection but are listed under "other". So I expanded the regular expression to
But the colums and tag browser show it under "other".
I also tried unicode:
Being both 1) new to the calibre template language and 2) a regular-expression-avoider-whenever-I-can I assume that I made a mistake... but what puzzles me is that the Template value of the Edit template window shows the expected "Authors A-I" (at least in the first case, without unicode notation).
Could this be a bug in Calibre?
Last edited by bookworm2000; 01-01-2013 at 10:54 PM. Reason: typo
|01-02-2013, 06:31 AM||#2|
"chaley", not "charley"
Join Date: Jan 2010
Device: Many android devices
You found a strange bug in calibre that has been lurking for many months. Character classes are not processed in unicode in compiled template functions, but *are* in interpreted template functions. Functions are interpreted when using the template editor. They are compiled for performance when used in composite columns.
I have submitted a fix that should be in the next release. In the meantime you can work around the problem by changing the tweak "Compile General Program Mode templates to Python" to False.
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