make sure get_isbn returns nil instead of empty string, check again a…

…fter removing illegal chars
team-umlaut · Jun 23, 2009 · 5632638 · 5632638
1 parent 76469c4
commit 5632638
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/lib/metadata_helper.rb b/lib/metadata_helper.rb
@@ -237,8 +237,8 @@ def normalize_lccn(lccn)
   def get_isbn(rft)
     isbn = get_identifier(:urn, "isbn", rft)
     isbn = isbn.gsub(/[^\dX-]/, '') if isbn
-
-    isbn
+    return nil if isbn.blank?
+    return isbn
   end
 
   def get_oclcnum(rft)