Custom column listing the tags and language

dpierron · 10-16-2012, 06:13 AM

Hi,

I'd like to add a custom column which would take the list of tags, and prepend the book language to each tag, resulting in a new list.

For example, a book in french with tags "tag1, tag2, tag3" would produce this result "fr_tag1, fr_tag2, fr_tag3".

Is it possible ?

Thanks,
David.

kovidgoyal · 10-17-2012, 11:18 PM

Should be possible with the various functions in the template language.

dpierron · 10-18-2012, 11:09 AM

Hi Kovid, thanks for your tip.

I actually tried playing with the template language functions before posting (should have made it obvious) but I miserably failed, being such a bad Python hacker...

Could anyone with more Python-fu than me (that is, everybody imho) help me with this please ?

chaley · 10-19-2012, 02:39 AM

The template language is closer to lisp (with "prog") than python, but not all that close.

The following does what I think you want

Code:

program: 
	lang = test(field('language'), strcat(field('language'), '_'), '');
	list_re(field('tags'), ',', '(.*)', strcat(lang, '\1') )

It assumes that there is one language in languages or that you want all languages as the prefix, and that you want the language code instead of the language name.

dpierron · 10-19-2012, 07:24 AM

Thanks a lot chaley, that's exactly what I was looking for !

Congratulations on your LISP-looking-Python-fu

10-16-2012, 06:13 AM	#1
dpierron calibre2opds guru Posts: 533 Karma: 8792 Join Date: Aug 2005 Location: Metz, France Device: iPhone, iPad, PRS-650	Custom column listing the tags and language Hi, I'd like to add a custom column which would take the list of tags, and prepend the book language to each tag, resulting in a new list. For example, a book in french with tags "tag1, tag2, tag3" would produce this result "fr_tag1, fr_tag2, fr_tag3". Is it possible ? Thanks, David.

10-19-2012, 02:39 AM	#4
chaley Grand Sorcerer Posts: 11,931 Karma: 7208979 Join Date: Jan 2010 Location: Notts, England Device: Kobo Libra 2	The template language is closer to lisp (with "prog") than python, but not all that close. The following does what I think you want Code: program: lang = test(field('language'), strcat(field('language'), '_'), ''); list_re(field('tags'), ',', '(.*)', strcat(lang, '\1') ) It assumes that there is one language in languages or that you want all languages as the prefix, and that you want the language code instead of the language name.

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10-17-2012, 11:18 PM	#2
kovidgoyal creator of calibre Posts: 44,317 Karma: 23661992 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Should be possible with the various functions in the template language.

10-18-2012, 11:09 AM	#3
dpierron calibre2opds guru Posts: 533 Karma: 8792 Join Date: Aug 2005 Location: Metz, France Device: iPhone, iPad, PRS-650	Hi Kovid, thanks for your tip. I actually tried playing with the template language functions before posting (should have made it obvious) but I miserably failed, being such a bad Python hacker... Could anyone with more Python-fu than me (that is, everybody imho) help me with this please ?

10-19-2012, 07:24 AM	#5
dpierron calibre2opds guru Posts: 533 Karma: 8792 Join Date: Aug 2005 Location: Metz, France Device: iPhone, iPad, PRS-650	Thanks a lot chaley, that's exactly what I was looking for ! Congratulations on your LISP-looking-Python-fu

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