如何跳过会话创建？

Question

当nil 用户点击“注册”时，鼓励他在登录前提交目标、习惯和价值观。

但他可以通过点击跳过其中一种形式：

问题是，如果他现在跳过一个表格，就会弹出一条错误消息：

TypeError in UsersController#create
no implicit conversion of nil into String

在这个例子中，我跳过了习惯形式，所以它在@user.habits.create(上提出

users_controller

  def create
    @user = User.new(user_params)
    if @user.save
      # Goals
      name = session.delete(:goal_name)
      deadline = session.delete(:goal_deadline)
      # Values
      vname = session.delete(:valuation_name)
      vimage = session.delete(:valuation_image)
      # Habits
      date_started = session.delete(:habit_date_started)
      committed = session.delete(:habit_committed)
      trigger = session.delete(:habit_trigger)
      action = session.delete(:habit_action)
      target = session.delete(:habit_target)
      reward = session.delete(:habit_reward)
      missed_days = session.delete(:habit_missed_days)
      # Create
      @user.habits.create(date_started: Date.parse(date_started), committed: committed, trigger: trigger, action: action, target: target, reward: reward, missed_days: missed_days).create_with_current_level
      @user.goals.create(name: name, deadline: deadline)
      @user.valuations.create(name: vname, image: vimage)
      @user.send_activation_email
      redirect_to root_url
    else
      render 'new'
    end
  end

我们怎样才能让用户跳过？我一直在尝试包含各种 if/else 语句，但我很难设置正确的方法来触发条件。

Answer 1

我假设如果他们提交表单，所有值都会被填充。也就是说：

users_controller

  def create
    @user = User.new(user_params)
    make_habit = false
    make_goal = false
    make_valuation = false

    if @user.save
      # Goals
      name = session.delete(:goal_name)
      deadline = session.delete(:goal_deadline)
      make_goal = true  if !name.blank? && !deadline.blank?

      # Values
      vname = session.delete(:valuation_name)
      vimage = session.delete(:valuation_image)
      make_valuation = true  if !vname.blank? && !vimage.blank?

      # Habits
      date_started = session.delete(:habit_date_started)
      committed = session.delete(:habit_committed)
      trigger = session.delete(:habit_trigger)
      action = session.delete(:habit_action)
      target = session.delete(:habit_target)
      reward = session.delete(:habit_reward)
      missed_days = session.delete(:habit_missed_days)
      make_habit = true  if !date_started.blank? && !committed.blank? #(... continue for whatever else you want to make sure is there)

      # Create
      @user.habits.create(date_started: Date.parse(date_started), committed: committed, trigger: trigger, action: action, target: target, reward: reward, missed_days: missed_days).create_with_current_level  if make_habit
      @user.goals.create(name: name, deadline: deadline)  if make_goal
      @user.valuations.create(name: vname, image: vimage)  if make_valuation
      @user.send_activation_email
      redirect_to root_url
    else
      render 'new'
    end
  end