lib/paperclip/interpolations.rb in paperclip-2.3.11 vs lib/paperclip/interpolations.rb in paperclip-2.3.12

@@ -4,17 +4,17 @@
   # can either open this module and define it, or call the
   # Paperclip.interpolates method.
   module Interpolations
     extend self
 
-    # Hash assignment of interpolations. Included only for compatability,
+    # Hash assignment of interpolations. Included only for compatibility,
     # and is not intended for normal use.
     def self.[]= name, block
       define_method(name, &block)
     end
 
-    # Hash access of interpolations. Included only for compatability,
+    # Hash access of interpolations. Included only for compatibility,
     # and is not intended for normal use.
     def self.[] name
       method(name)
     end
 
@@ -33,11 +33,11 @@
       end
     end
 
     # Returns the filename, the same way as ":basename.:extension" would.
     def filename attachment, style_name
-      "#{basename(attachment, style_name)}.#{extension(attachment, style_name)}"
+      [ basename(attachment, style_name), extension(attachment, style_name) ].reject(&:blank?).join(".")
     end
 
     # Returns the interpolated URL. Will raise an error if the url itself
     # contains ":url" to prevent infinite recursion. This interpolation
     # is used in the default :path to ease default specifications.
@@ -95,9 +95,14 @@
     end
 
     # Returns the id of the instance.
     def id attachment, style_name
       attachment.instance.id
+    end
+
+    # Returns the #to_param of the instance.
+    def param attachment, style_name
+      attachment.instance.to_param
     end
 
     # Returns the fingerprint of the instance.
     def fingerprint attachment, style_name
       attachment.fingerprint