start on card editing

app/models/merged/card.rb

@@ -0,0 +1,16 @@
+module Merged
+  class Card
+    include ActiveModel::API
+    include ActiveModel::Conversion
+    extend  ActiveModel::Naming
+
+    attr_reader  :content  , :section
+
+    def initialize(section , card_data)
+      @section = section
+      raise "No data #{card_data}" unless card_data.is_a?(Hash)
+      @content = card_data
+    end
+
+  end
+end

app/models/merged/section.rb

@@ -13,7 +13,7 @@ module Merged
     def initialize(page , index , section_data)
       @page = page
       raise "No number #{index}" unless index.is_a?(Integer)
-      raise "No has #{section_data}" unless section_data.is_a?(Hash)
+      raise "No hash #{section_data}" unless section_data.is_a?(Hash)
       @index = index
       @content = section_data
     end
@@ -28,6 +28,12 @@ module Merged
       @content[key] = value
     end
 
+    def cards
+      element = @content["cards"]
+      return [] if element.nil?
+      element.collect{|card_content| Card.new(self , card_content)}
+    end
+
     def template
       @content["template"]
     end