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-rw-r--r--actionpack/lib/action_controller/metal/params_wrapper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/metal/params_wrapper.rb b/actionpack/lib/action_controller/metal/params_wrapper.rb
index fc8a8c9dcd..1f52c164de 100644
--- a/actionpack/lib/action_controller/metal/params_wrapper.rb
+++ b/actionpack/lib/action_controller/metal/params_wrapper.rb
@@ -166,7 +166,7 @@ module ActionController
unless options[:include] || options[:exclude]
model ||= _default_wrap_model
- role = options.has_key?(:as) ? options[:as] : :default
+ role = options.fetch(:as, :default)
if model.respond_to?(:accessible_attributes) && model.accessible_attributes(role).present?
options[:include] = model.accessible_attributes(role).to_a
elsif model.respond_to?(:attribute_names) && model.attribute_names.present?