Ruby on rails 4 Rails 4-分配属性时，必须将哈希作为参数传递

有人能帮我找出为什么我会出现以下错误吗

When assigning attributes, you must pass a hash as an argument.

表格：

    <%= form_for([current_user, current_user.suggestions.build]) do |f| %>
        <%= f.label :category %>:
        <%= f.select :category, ['Startup', 'Cars', 'Kids', 'Food', 'Other'] %> <br>
        <%= f.text_area :suggestion %><br>
        <%= f.submit 'Submit Suggestion' %>
    <% end %>

应用程序控制器：

  def create
    @suggestion = current_user.suggestions.create(suggestion_params)
  end

  private
    def suggestion_params
      params.require(:suggestion).permit(:suggestion, :category)
      redirect_to shirts_path
    end

  helper_method :current_user

  private

    def current_user
      @current_user ||= User.find(session[:user_id]) if session[:user_id]
    end

---

suggestion\u params

正在返回方法的最后一行

重定向到当前用户的路径

。suggestions.create无法接受，因为它是不可接受的数据

重定向应在

create

方法中：

def create
    @suggestion = current_user.suggestions.create(suggestion_params)
    redirect_to shirts_path
end

private
  def suggestion_params
    params.require(:suggestion).permit(:suggestion, :category)
  end

---

天哪，我犯了个愚蠢的错误。谢谢你的帮助！