add `ActionController::Parameters#merge!`

This method has the same behavior as `Hash#merge!`, returns current
`ActionController::Parameters`.

1 files changed, 7 insertions, 0 deletions

diff --git a/actionpack/lib/action_controller/metal/strong_parameters.rb b/actionpack/lib/action_controller/metal/strong_parameters.rb
index b64617d084..9df67d4be1 100644
--- a/actionpack/lib/action_controller/metal/strong_parameters.rb
+++ b/actionpack/lib/action_controller/metal/strong_parameters.rb
@@ -573,6 +573,13 @@ module ActionController
       )
     end
 
+    # Returns current <tt>ActionController::Parameters</tt> instance which
+    # +other_hash+ merges into current hash.
+    def merge!(other_hash)
+      @parameters.merge!(other_hash.to_h)
+      self
+    end
+
     # This is required by ActiveModel attribute assignment, so that user can
     # pass +Parameters+ to a mass assignment methods in a model. It should not
     # matter as we are using +HashWithIndifferentAccess+ internally.