def get_category_tag_cloud():
from techblog.services.articles import ArticleService
from techblog.services.categories import CategoryService
cats = CategoryService.get_categories_with_count()
for category in cats:
article_ids = ArticleService.get_article_ids_by_category(category)
category.tags = list(TagService.get_filtered_tag_cloud([a.id for a in article_ids]))
if not category.tags:
category.empty = True
return cats
