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: 12,335 Karma: 8012652 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.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to move tags data into a new custom column	smoothrolla	Library Management	6	05-30-2018 07:19 AM
On Device column listing incorrect info	ScarletSony	Library Management	12	02-09-2012 01:44 AM
Download tags to a custom column	atjnjk	Library Management	8	01-18-2012 08:02 AM
Sony PRS-T1 and plugboards "tags" from custom column	salines	Devices	8	10-31-2011 03:00 AM
Help with template for custom column from tags	africalass	Library Management	2	07-16-2011 11:47 AM

10-17-2012, 11:18 PM	#2
kovidgoyal creator of calibre Posts: 45,177 Karma: 27110894 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

Advert

Advert