Adds is_collection? method in helpers for easier collection detection

lib/rabl/engine.rb

@@ -33,7 +33,7 @@ def to_hash(options={})
       data = data_object(@_data)
       if is_object?(data) || !data # object @user
         Rabl::Builder.new(@_data, options).to_hash(options)
-      elsif !is_object?(data) # collection @users
+      elsif is_collection?(data) # collection @users
         object_name = data_name(@_data).to_s.singularize # @users => :users
         data.map { |object| Rabl::Builder.new({ object => object_name }, options).to_hash(options) }
       end

lib/rabl/helpers.rb

@@ -52,14 +52,19 @@ def resolve_condition(options)
       result
     end
 
-    # Returns true if item is not enumerable
+    # Returns true if obj is not enumerable
     # is_object?(@user) => true
     # is_object?([]) => false
     # is_object?({}) => false
     def is_object?(obj)
       obj && !data_object(obj).is_a?(Enumerable)
     end
 
+    # Returns true if the obj is a collection of items
+    def is_collection?(obj)
+      obj && data_object(obj).is_a?(Enumerable)
+    end
+
     # Returns source for a given relative file
     # fetch_source("show", :view_path => "...") => "...contents..."
     def fetch_source(file, options={})
@@ -74,10 +79,10 @@ def fetch_source(file, options={})
         # Padrino chops the extension, stitch it back on
         file_path = File.join(@_scope.settings.views, (file_path.to_s + ".rabl"))
       end
-      
+
       if file_path
         return File.read(file_path.to_s), file_path.to_s
-      else 
+      else
         nil
       end
     end