Strong parametes

application controller

class ApplicationController < ActionController::Base

helper_method :permitted_params

private
   def permitted_params
    PermittedParams.new(params)
  end

logs

+++++++++++++++raw+++++{"utf8"=>"✓", "authenticity_token"=>"CfGubZxXPW/7XEHEhnFTjKVKByNxGb5r3KJqoqoXHms=", "unit_plate"=>{"name"=>"Okyqaa", "name_type"=>"boyqaa", "parent_id"=>"", "unit_plate_components_attributes"=>{"1375184158151"=>{"component_id"=>"115", "_destroy"=>"false"}}}, "commit"=>"Create Unit plate", "action"=>"create", "controller"=>"admin/unit_plates"}
Unpermitted parameters: component_id, _destroy
Unpermitted parameters: name_type
++++++++++++++++++++{"name"=>"Okyqaa", "parent_id"=>"", "unit_plate_components_attributes"=>{"1375184158151"=>{}}}

permitted_params.rb

 Klass = Struct.new(:params) unless defined?(Klass
 class PermittedParams < Klass
        #For: admin/unit_plates/new
        
  def unit_plate
  params.require(:unit_plate).permit(:name,:name_type,:type,:unit_plate_components_attributes => [:id, '_destroy',:component_id,:name,:type,:parent_id,:lft,:rgt,:depth])
  end
end

end

unit_plate_controller.rb

  def create
    Rails.logger.info "+++++++++++++++raw+++++#{params.inspect}"
    Rails.logger.info "++++++++++++++++++++#{permitted_params.unit_plate.inspect}"
    @unit_plate = UnitPlate.new(permitted_params.unit_plate)
    if @unit_plate.save
      redirect_to edit_admin_unit_plate_url(@unit_plate), :notice => 'Template was successfully created.'
    else
      render :action => 'new'
    end
  end