Problem with contains function in save template

[MicaOlaAdams]

Hi everybody,

I set the following save template

{#genre:contains(Sachbuch, {title}, {author}_{title})}

The idea is to save books with the "Sachbuch"-genre only by title and any thing else by author and title.

Now every book that has any of the following characters in its title throws an error

, { } ( )

ValueError: Failed to calculate path for save to disk. Template: {#genre:contains(Sachbuch, {title}, {authors}_{title})}
    Error: Incorrect number of arguments for function contains

I suppose this is because those characters are part of the function itself.

Any ideas how to solve this problem?

[chaley]

Your problem is happening because you didn't respect what it says in the template language manual, "Do not use subtemplates (`{ ... }`) as function arguments." In addition, in single-function-mode spaces are significant. You should include them only where you want them in the output.

The most general way to fix this is to use general program mode. Something like

program:
	contains(
		field('#genre'),
		'Sachbuch', 
		field('title'), 
		strcat(field('authors'), '_', field('title'))
	)

[MicaOlaAdams]

Many thanks.

I'm still new to this whole template language thing and have overlooked this warning completely.

[MicaOlaAdams]

I read now the manual, but I still don't understand how I can include a folder structure for a save template in general program mode.

E.g. to save books from the "Sachbuch"-genre into /genre/series/title and everything else into /genre/author/title.

Maybe somebody could provide a exemplary code.

[chaley]

program:
	middle = contains(
		field('#genre'),
		'Sachbuch', 
		field('series'), 
		field('authors')
	);
	strcat(field('#genre'), '/', middle, '/', field('title'))

[MicaOlaAdams]

I've been thinking this whole thing backwards

Thanks again!