def setAction(self, book, status, price=None):
user = self.user
if not user:
raise Exception("Not signed in")
ub = UserBooks.gql("WHERE user_id = :1 AND book_id = :2 AND status=:3", user, book, status).get()
if not ub:
ub = UserBooks(user_id=user, book_id=book, status=status, price=price)
ub.put()
self.sendMessages(ub)
elif price:
ub.price = price
ub.put()
return [str(ub.key()), ub.price]
