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class ActionController::UnpermittedParameters

Raised when a supplied parameter is not expected and ActionController::Parameters.action_on_unpermitted_parameters is set to :raise.

params = ActionController::Parameters.new(a: "123", b: "456")
params.permit(:c)
# => ActionController::UnpermittedParameters: found unpermitted parameters: :a, :b

Inherits From

Definition files