Columns

[Starson17]

Originally Posted by Noughty

I mean that in book details it is written all tags first after all tags all shelves are written. Instead of having all tags and shelves mixed with each other so they would be alphabetical.
You suggestion will fix it?

Which duplicate - tags or shelves do you want deleted? I think it would be nice to have the option for either to be deleted. Perhaps it would also be possible to color the different groups tags/shelves in different colors? I would also like ....

[chaley]

Originally Posted by Noughty

I mean that in book details it is written all tags first after all tags all shelves are written. Instead of having all tags and shelves mixed with each other so they would be alphabetical.
You suggestion will fix it?

Yes, although because of the bug, until the next release the order will be reversed.

BTW: having one list first and then the items from the other is the defined behavior of merge_lists. I suggest that to learn more about tempates, you look at the template language documents: http://manual.calibre-ebook.com/template_lang.html

[Noughty]

I am trying but all these templates are still very confusing. And I cannot even find the template merge_lists in that link. I find list_union which is for merging apparently.

I don't get the basics yet. The guide is a little complicated. I'm not sure I will ever learn how to use the more complicated template language if it isn't directly written how exactly to make one thing or another.

list_sort(merge_lists(field('tags'), field('#textmult'), ','), 0, ',')

Like what ','), 0, ',') this part means and similar?

#textmult is my custom column? As I cannot find "textmult" in template guide.

At the moment I have:

{#shelf:'merge_lists(field('tags'), $, ',')'}

And in this I don't understand what $ does. Basically I would like some basics of the language, symbols and their meaning etc.

[chaley]

Originally Posted by Noughty

Like what ','), 0, ',') this part means and similar?

Those are parameters to the function identified by the ( ) pairs and are documented for each function.

The function syntax of template programs is similar to what one finds in excel and similar programs. The functions are different, but the way the functions are written and used are not. Calibre's function syntax is documented here. The functions are documented here.

#textmult is my custom column? As I cannot find "textmult" in template guide.

'#textmult', the parameter to the field() function, is the name of my column that I used to test the template. I don't have a column named #shelf.

At the moment I have:

{#shelf:'merge_lists(field('tags'), $, ',')'}

And in this I don't understand what $ does. Basically I would like some basics of the language, symbols and their meaning etc.

Quoting the manual

the variable $ stands for the field the expression is operating upon, #series in this case.

In your case the $ stands for #shelf.

That template is using template program mode and consists of two functions, merge_lists() (obsolete, replaced by list_union) that uses the result (return value) of field() as its first parameter. $ is the second parameter to merge_lists, and ',' is the third parameter.