@ -110,6 +110,8 @@ class Identifiers(Base):
return u"http://dx.doi.org/{0}".format(self.val)
elif self.type == "goodreads":
return u"http://www.goodreads.com/book/show/{0}".format(self.val)
elif self.type == "douban":
return u"https://book.douban.com/subject/{0}".format(self.val)
else:
return u""