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class

ActionController::ExpectedParameterMissing

v8.0.0 - Show latest stable - Superclass: ActionController::ParameterMissing

Raised from `expect!` when an expected parameter is missing or is of an incompatible type.

params = ActionController::Parameters.new(a: {})
params.expect!(:a)
# => ActionController::ExpectedParameterMissing: param is missing or the value is empty or invalid: a

Files

  • actionpack/lib/action_controller/metal/strong_parameters.rb