1 files changed, 14 insertions, 4 deletions
diff --git a/activesupport/lib/active_support/lazy_load_hooks.rb b/activesupport/lib/active_support/lazy_load_hooks.rb
index 642a4c105c..3664431a28 100644
--- a/activesupport/lib/active_support/lazy_load_hooks.rb
+++ b/activesupport/lib/active_support/lazy_load_hooks.rb
@@ -2,16 +2,26 @@ module ActiveSupport
   @load_hooks = Hash.new {|h,k| h[k] = [] }
   @loaded = {}
 
-  def self.on_load(name, &block)
+  def self.on_load(name, options = {}, &block)
     if base = @loaded[name]
-      base.instance_eval(&block)
+      execute_hook(base, options, block)
     else
-      @load_hooks[name] << block
+      @load_hooks[name] << [block, options]
+    end
+  end
+
+  def self.execute_hook(base, options, block)
+    if options[:yield]
+      block.call(base)
+    else
+      base.instance_eval(&block)
     end
   end
 
   def self.run_load_hooks(name, base = Object)
-    @load_hooks[name].each { |hook| base.instance_eval(&hook) }
     @loaded[name] = base
+    @load_hooks[name].each do |hook, options|
+      execute_hook(base, options, hook)
+    end
   end
 end
 \ No newline at end of file