如何在会话中存储零用户的目标？

Question

如何在用户的会话中保存用户的目标？然后，一旦他注册，保存该目标并将其从会话中删除？

在主页上是这样的：

goals/_form.html.erb

<%= simple_form_for(@goal) do |f| %>
  <%= f.text_field :name %>
  <%= f.text_field :deadline %>
  <%= f.submit %>
<% end %>

点击提交后，nil 用户的目标应该被添加到他的会话中，然后他应该被重定向到注册页面，注册后他的目标应该被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，如果我以nil 用户身份点击提交，我会得到：

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，就应该将其添加到他的帐户中。如果最后一个条件太复杂，我可以单独提出一个问题。

Answer 1

目标控制者

  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