monkey patch of Hash

config/initializers/hash_patch.rb

@@ -0,0 +1,15 @@
+# We need this patch because of json format error in the CI API:
+#   IOError (not opened for reading)
+# Details: http://stackoverflow.com/questions/19808921/upgrade-to-rails-4-got-ioerror-not-opened-for-reading
+# It happens because of ActiveSupport's monkey patch of json formatters
+
+if defined?(ActiveSupport::JSON)
+  Hash.class_eval do
+    def to_json(*args)
+      super(args)
+    end
+    def as_json(*args)
+      super(args)
+    end
+  end
+end