Add utility for models to access fields

Author: adriangs1996

lib/mortymer/model.rb

@@ -18,5 +18,17 @@ def self.json_schema
     def self.structify(params)
       call(params)
     end
+
+    def self.call(value)
+      if value.instance_of?(self.class)
+        value
+      else
+        super
+      end
+    end
+
+    def [](key)
+      @attributes[key.to_sym]
+    end
   end
 end