No need to use inject here, use map instead.

Signed-off-by: NSantiago Pastorino <santiago@wyeworks.com>

activerecord/lib/active_record/attribute_methods/before_type_cast.rb

@@ -13,10 +13,7 @@ def read_attribute_before_type_cast(attr_name)
 
       # Returns a hash of attributes before typecasting and deserialization.
       def attributes_before_type_cast
-        self.attribute_names.inject({}) do |attrs, name|
-          attrs[name] = read_attribute_before_type_cast(name)
-          attrs
-        end
+        Hash[attribute_names.map { |name| [name, read_attribute_before_type_cast(name)] }]
       end
 
       private