1 files changed, 17 insertions, 11 deletions
diff --git a/activerecord/lib/active_record/coders/yaml_column.rb b/activerecord/lib/active_record/coders/yaml_column.rb
index f6cdc67b4d..9ea22ed798 100644
--- a/activerecord/lib/active_record/coders/yaml_column.rb
+++ b/activerecord/lib/active_record/coders/yaml_column.rb
@@ -3,12 +3,12 @@ require 'yaml'
 module ActiveRecord
   module Coders # :nodoc:
     class YAMLColumn # :nodoc:
-      RESCUE_ERRORS = [ ArgumentError, Psych::SyntaxError ]
 
       attr_accessor :object_class
 
       def initialize(object_class = Object)
         @object_class = object_class
+        check_arity_of_constructor
       end
 
       def dump(obj)
@@ -24,18 +24,24 @@ module ActiveRecord
       def load(yaml)
         return object_class.new if object_class != Object && yaml.nil?
         return yaml unless yaml.is_a?(String) && yaml =~ /^---/
-        begin
-          obj = YAML.load(yaml)
+        obj = YAML.load(yaml)
 
-          unless obj.is_a?(object_class) || obj.nil?
-            raise SerializationTypeMismatch,
-              "Attribute was supposed to be a #{object_class}, but was a #{obj.class}"
-          end
-          obj ||= object_class.new if object_class != Object
+        unless obj.is_a?(object_class) || obj.nil?
+          raise SerializationTypeMismatch,
+            "Attribute was supposed to be a #{object_class}, but was a #{obj.class}"
+        end
+        obj ||= object_class.new if object_class != Object
 
-          obj
-        rescue *RESCUE_ERRORS
-          yaml
+        obj
+      end
+
+      private
+
+      def check_arity_of_constructor
+        begin
+          load(nil)
+        rescue ArgumentError
+          raise ArgumentError, "Cannot serialize #{object_class}. Classes passed to `serialize` must have a 0 argument constructor."
         end
       end
     end