How to Handle the Unpermitted Parameters Error in Ruby

The ActionController::UnpermittedParameters error in Ruby on Rails occurs when a parameter that is not allowed is passed during create, update, or user-defined actions, and it can complicate debugging in older Rails versions due to insufficient logging information. To address this, developers can modify the configuration file by setting `action_on_unpermitted_parameters` to `:raise`, which will trigger the error when unpermitted parameters are detected, or they can add context to the parameters, logging additional information about the controller and action involved. In newer Rails versions, context can be specified in the logging payload, further aiding in debugging for large applications. To handle these errors, developers can use the `rescue_from` clause to specify custom error-handling methods, which can be enhanced by using `.to_unsafe_h` and `.except` to ensure only the problematic parameters are displayed. Additionally, tools like Rollbar can be employed for real-time error tracking, analysis, and management, thereby simplifying the process of fixing Ruby errors and increasing deployment confidence.