Is it possible to chain strong parameters in a Rails controller

Question

I'm currently doing this

class DetailsController < ApplicationController
  def create
    @detail = Detail.new(params.require(:detail).permit(:user_id, :note))
    if @detail.save
      redirect_to @detail
    else
      render 'new'
    end
  end
  
  def update
    @detail = Detail.find(params[:id])
    if @detail.update(detail_params)
      redirect_to @detail
    else
      render 'edit'
    end
  end
  
  private
  def detail_params
    params.require(:detail).permit(:note)
  end  
end

Is it possible too chain strong parameters in Rails? I tried doing this but it didn't work

class DetailsController < ApplicationController
  def create
    @detail = Detail.new(detail_params.permit(:user_id))
    if @detail.save
      redirect_to @detail
    else
      render 'new'
    end
  end
  
  def update
    @detail = Detail.find(params[:id])
    if @detail.update(detail_params)
      redirect_to @detail
    else
      render 'edit'
    end
  end
  
  private
  def detail_params
    params.require(:detail).permit(:note)
  end  
end

Answer 1

To DRY things up I have used the tap method and done something like this...

 def detail_params(is_create = false)
   params.require(:detail).permit(:note).tap do |p|
     p[:user_id] = current_user.id if is_create
   end
 end 

  def create
    @detail = Detail.new(detail_params(true))
    if @detail.save
      redirect_to @detail
    else
      render 'new'
    end
  end


  def update
    @detail = Detail.find(params[:id])
    if @detail.update(detail_params)
      redirect_to @detail
    else
      render 'edit'
    end
  end

To just have different sets of parameters, this works...

 def detail_params(is_create = false)
   permitted = [:note]
   permitted << :user_id if is_create
   params.require(:detail).permit(permitted)
 end