def detail(request, key):
book = Book.get(key)
tag_key_list = book.tags #tags is always not None
tag_title_list = []
for tag_key in tag_key_list :
try :
tag_title = Tag.get(tag_key)
if tag_title :
tag_title_list.append(tag_title)
except :
pass
return render_to_response('catalog/detail.html', {'book': book,
'tag_title_list': tag_title_list})
