[chaley]

Originally Posted by chaley

Note that it won't work the way you want if a book has more than one author and only one of the authors has a note. The book won't be found by search. I'll look at changing the template.

Originally Posted by thiago.eec

Even the second template (item_has_notes)?

Here is a template that checks if all the items for a field have a note.

python:
def evaluate(book, context):
	field_name = context.arguments[0] if context.arguments is not None and  len(context.arguments) == 1 else None
	if field_name is None:
		raise NameError("The argument for the field name wasn't provided")

	db = context.db.new_api
	items_with_notes = context.globals.get('items_with_notes')
	if items_with_notes is None:
		items_with_notes = db.get_all_items_that_have_notes(field_name)
		context.globals['items_with_notes'] = items_with_notes
		context.globals['item_name_map'] = db.get_item_name_map(field_name)
	item_name_map = context.globals['item_name_map']

	vals = book.get(field_name)
	if vals is None:
		return ''
	if isinstance(vals, str):
		vals = tuple((vals,))
	for val in vals:
		if item_name_map.get(val) not in items_with_notes:
			return ''
	return '1'

It returns '' if any item for a field, for example any author in "authors", doesn't have a note.

I stored it with the name "all_items_have_notes".

I understand that you want to know if any author for a book doesn't have a note. In this case you would use

not template:"""program: all_items_have_notes('authors')#@#:b:yes"""