/ Ruby on Rails
/
class

ActionController::ParameterMissing

v6.0.0 - Show latest stable - Superclass: KeyError

Raised when a required parameter is missing.

params = ActionController::Parameters.new(a: {})
params.fetch(:b)
# => ActionController::ParameterMissing: param is missing or the value is empty: b
params.require(:a)
# => ActionController::ParameterMissing: param is missing or the value is empty: a

Attributes

[R]param

Files

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