stark_params.rb

class TasksController
  def index
    Task.where(IndexParams.new(params).params)
  end

  def create
    Task.create!(CreateParams.new(params).params)
  end

  private

  class IndexParams
    include StarkParameters
    
    require one: [:list_id, :user_id]
  end

  class CreateParams
    include StarkParameters
    
    require :assignee_id
    require :title, as: :task_content
    permit  :due_date
    permit  :important, as: :starred
  end
end