activerecord 信誉系统：用户投票后隐藏按钮

Question

我正在使用 Railscast 教程来实现 activerecord 信誉系统：http://railscasts.com/episodes/364-active-record-reputation-system?view=comments

但用户投票后我无法隐藏按钮。

我是这样做的：

后控制器：

def accept
  value = params[:type] == "accept" ? 1 : -1  # vote type = accept
  @improvement_action = ImprovementAction.find(params[:id])
  @improvement_action.add_or_update_evaluation(:accepts, value, current_user)
  redirect_to :back, notice: "You accepted the answer!"
end

后模型：

has_reputation :accepts, source: :user, aggregated_by: :sum

用户模型：

has_many :evaluations, class_name: "RSEvaluation", as: :source   #accept answer (activerecord reputation-system gem)

has_reputation :accepts, source: {reputation: :accepts, of: :improvement_actions}, aggregated_by: :sum


def voted_for? improvement_action
    evaluations.where(target_type: improvement_action.class, target_id: improvement_action.id).exists?
end

并在视图中这样调用：

<% if current_user && current_user.voted_for?(improvement_action) %>
  VOTED
<% else %>
  NOT VOTED
  <%= link_to "up", accept_improvement_action_path(improvement_action, type: "accept"), method: "post" %>
<% end %>

我做错了什么？像这样似乎总是被投票

Answer 1

尝试改变

<% if current_user && !current_user.voted_for?(improvement_action) %>
        VOTED
      <%     else %>
     NOT VOTED

        <%= link_to "up", accept_improvement_action_path(improvement_action, type: "accept"), method: "post" %>
        <% end %>

到

<% if current_user && !current_user.voted_for?(improvement_action) %>
  NOT VOTED
  <%= link_to "up", accept_improvement_action_path(improvement_action, type: "accept"), method: "post" %>
<% end %>

先看看up链接有没有出现

更新

显然 railscast 教程已经过时了，gem 已经改变了很多。它不再起作用的原因是因为数据库模式已完全更改，它不再使用多态。以下代码应该可以解决您的问题：

class User < ActiveRecord::Base
  has_many :posts

  has_reputation :accepts, source: {reputation: :accepts, of: :posts}, aggregated_by: :sum

  def voted_for?(post)
    Post.where(id: post.id).evaluated_by(:accepts, self)
  end

end