Rails：每个循环只显示唯一的关联记录-Rails:Eachloopthatonlyshowsuniqueassociatedrecords

I have an situation where I want to show an each loop of 'updates'. Each update had a game associated with it (game_id). Some times there are updates that have the same game as other updates. How do I modify the loop so that it only shows unique updates? (in the example code below, I don't want to show the same game thumbnail twice)

我有一种情况,我想显示每个'更新'循环。每次更新都有一个与之相关的游戏(game_id)。有时候有些更新与其他更新具有相同的游戏。如何修改循环以便仅显示唯一更新? (在下面的示例代码中,我不想两次显示相同的游戏缩略图)

In the view:

在视图中:

  <% current_user.updates.each do |update| %>

     

  <% end %>

In the updates model

在更新模型中

belongs_to :user

belongs_to :game

In the game model

在游戏模型中

has_many :users

has_many :updates

In the user model

在用户模型中

has_many :updates

2 个解决方案

scope :most_recent, group(:game_id).order('created_at ASC')

<% current_user.updates.most_recent.each do |update| %>