app/controllers/task_lists_controller.rb


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class TaskListsController < ApplicationController
  before_action :set_task_list, only: [:show, :edit, :update]

  def index
    @task_lists = TaskList.all
  end

  def show
    @task = Task.new
  end

  def new
    @task_list = TaskList.new
  end

  def edit
  end

  def update
    @task_list.update!(params[:task_list])
  end

  def create
    task_list = TaskList.create!(task_list_params)
    redirect_to task_list_path(task_list)
  end

  private

  def task_list_params
    params.require(:task_list).permit(:name)
  end

  def set_task_list
    @task_list = TaskList.find(params[:id])
  end
end