Exception: ActionController::ParameterMissing

Inherits:

KeyError

• Object
• KeyError
• ActionController::ParameterMissing

Defined in:

lib/action_controller/metal/strong_parameters.rb

Overview

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

Instance Attribute Summary

• #param ⇒ Object readonly

  :nodoc:.

Instance Method Summary

• #initialize(param) ⇒ ParameterMissing constructor

  :nodoc:.

Constructor Details

#initialize(param) ⇒ ParameterMissing

:nodoc:

# File 'lib/action_controller/metal/strong_parameters.rb', line 22

def initialize(param) # :nodoc:
  @param = param
  super("param is missing or the value is empty: #{param}")
end

Instance Attribute Details

#param ⇒ Object (readonly)

:nodoc:

# File 'lib/action_controller/metal/strong_parameters.rb', line 20

def param
  @param
end