Exception: ActionController::UnpermittedParameters
| Relationships & Source Files | |
| Super Chains via Extension / Inclusion / Inheritance | |
| Class Chain: 
          self,
          IndexError
         | |
| Instance Chain: 
          self,
          IndexError
         | |
| Inherits: | IndexError 
 | 
| Defined in: | actionpack/lib/action_controller/metal/strong_parameters.rb | 
Overview
Raised when a supplied parameter is not expected and Parameters.action_on_unpermitted_parameters is set to :raise.
params = ActionController::Parameters.new(a: "123", b: "456")
params.permit(:c)
# => ActionController::UnpermittedParameters: found unpermitted parameters: :a, :b