- tags_pks = [tag.pk for tag in tags]
- for book in objects:
- for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
- if tag_pk in tags_pks:
- continue
- related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
+ if books.count() > 0:
+ # get related tags from `tag_counter` and `theme_counter`
+ tags_pks = [tag.pk for tag in tags]
+ for book in books:
+ for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
+ if tag_pk in tags_pks:
+ continue
+ related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
+
+ if pictures.count() > 0:
+ tags_pks = [tag.pk for tag in tags]
+ for picture in pictures:
+ for tag_pk, value in itertools.chain(picture.tag_counter.iteritems(), picture.theme_counter.iteritems()):
+ if tag_pk in tags_pks:
+ continue
+ related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
+