/ Ruby on Rails
/
class

ActionController::ParameterMissing

v4.2.9 - Show latest stable - Superclass: KeyError

Raised when a required parameter is missing.

params = ActionController::Parameters.new(a: {})
params.fetch(:b)
# => ActionController::ParameterMissing: param not found: b
params.require(:a)
# => ActionController::ParameterMissing: param not found: a

Attributes

[R]param

Files

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