class ActionController::ExpectedParameterMissing

Parent:
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

© 2004–2021 David Heinemeier Hansson
Licensed under the MIT License.