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-rw-r--r--railties/lib/rails/engine.rb9
1 files changed, 9 insertions, 0 deletions
diff --git a/railties/lib/rails/engine.rb b/railties/lib/rails/engine.rb
index 85ff09d2af..7f53e2dc72 100644
--- a/railties/lib/rails/engine.rb
+++ b/railties/lib/rails/engine.rb
@@ -199,6 +199,15 @@ module Rails
@endpoint = endpoint if endpoint
@endpoint
end
+
+ def isolated_engine_for(mod)
+ _engine = self
+ mod.singleton_class.instance_eval do
+ define_method(:_railtie) do
+ _engine
+ end
+ end
+ end
end
delegate :middleware, :root, :paths, :to => :config