[chaley]

Originally Posted by Purple Lady

I'm using a template function - I copied something Chaley did for someone for the sub collections for Sony PRS+ to start with and changed it to suit me. I have categories that I want as a top level collection, and genres that I want to combine with the #read column. I used to have series and author collections as well, but CC takes care of those.

Spoiler:

def evaluate(self, formatter, kwargs, mi, locals, cats, genre):
    categories = set([v.strip() for v in cats.split(',') if v.strip()])
    genres = set([v.strip() for v in genre.split(',') if v.strip()])
    res = []

    tags = [v.strip() for v in kwargs.get('tags') if v.strip()]
    isread = kwargs.get('#read')
	
	for v in tags:
		if v in categories:
			res.append(v)
		elif v in genres:
			if isread:
				res.append('Genre ' + isread+ '|' + v)
			else:
				res.append('Genre|'  + v)
		elif isread:
			res.append(isread + '|' + v)
		else:
			res.append('stuff|'  + v)

    if isread:
		res.append(isread) 
            
    return ', '.join(res)

I end up with these groupings:
Borrowed, Genre unread|Non Fiction, unread
read|-bought, Genre read|Mystery - Thriller, read
unread|-free, Genre unread|Science Fiction, unread

You can use a yes/no column (lets call it #read_yesno) by changing the line

isread = kwargs.get('#read')

to be

isread = kwargs.get('#read_yesno')
if isread == 'Yes': isread = 'read'
elif isread == 'No': isread = 'unread'
else: isread = ''