如何在会话中存储nil用户的目标？

如何在会话中保存用户的目标？ 然后，一旦他注册，保存该目标并从会话中删除它？

在主页上它看起来像这样：

目标/ _form.html.erb

单击提交后，应将nil用户的目标添加到他的会话中，然后将其重定向到注册页面，然后将其注册目标添加到他新创建的帐户中。

goals_controller

  def create @goal = params[:user] ? current_user.goals.build(goal_params) : Goal.new(goal_params) if params[:session][:name][:deadline] session[:name][:deadline] = params[:session][:name][:deadline] redirect_to signup_url elsif @goal.save track_activity @goal redirect_to @goal, notice: 'Goal was successfully created' else flash.now[:danger] = 'Required Field: "Enter Goal"' render 'new' end end 

现在如果我点击提交作为nil用户我得到：

 NoMethodError in GoalsController#create undefined method `[]' for nil:NilClass for line: if params[:session][:name][:deadline] 

然后，一旦他注册了存储在他的会话中的目标应该被添加到他的帐户。 如果这最后一个条件过于复杂，我可以将它作为一个单独的问题。

Answer 1

目标控制器

  def create unless params[:user].present? # If there is no user, store the goal values to the session session[:goal_name] = goal_params[:name] session[:goal_deadline] = goal_params[:deadline] redirect_to signup_url else @goal = current_user.goals.build(goal_params) if @goal.save track_activity @goal redirect_to @goal, notice: 'Goal was successfully created' else flash.now[:danger] = 'Required Field: "Enter Goal"' render 'new' end end 

用户控制器

 def create # create user logic if @user.save # Grab the session variable at the same time deleting it gName = session.delete(:goal_name) gDeadline = session.delete(:goal_deadline) # You can make this more complex for error handling @user.goals.create(name: gName, deadline: gDeadline) redirect_to success_creation_path else ... end end