Javascript Rails |我只想展示一些文章

我有两张桌子： -用户\活动：包含ID活动和ID用户 -活动：包含Id、Id用户等

我只想显示两个表中的活动

这是我的代码： -活动包含用户的所有活动 -usersactivities\u id在一个选项卡中包含用户的所有用户活动（例如：10、2、3）

def获取主要活动
用户=当前用户
活动=[]
user.groups.each do| group|
活动答案是，为我工作：）

def获取主要活动
用户=当前用户
活动=[]
usersactivities\u id=current\u user.user\u activities.select（'activity\u id'）.map（&:activity\u id）.uniq
user.groups.each do| group|
活动“获取活动”}
结束
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你能更清楚地解释一下你到底想显示什么吗？如果usersactivities\u id.include，这一行做什么？活动id

？这会给你带来一个错误吗？嗯，对不起，我的英文是：x我只想在user_activities和activity中显示活动（它们的链接是用户id和新闻id）@see虽然它通常会检查活动id是否在useractivity中，但我会更新帖子以显示日志：）Try

activity.joins(“在用户\u activities.activity\u id=activities.id和用户\u activities.user\u id=？”上内部加入用户\u活动，当前用户.id）。其中（组：当前用户.group\u id）。订单（“在DESC更新”）

并通过将

DESC

更改为

ASC

  def fetch_maj_activities
    user = current_user
    activities = []
    user.groups.each do |group|
      activities << Activity.where(group: group)
    end


    usersactivities_id = current_user.user_activities.select('activity_id').map(&:activity_id).uniq

    activities.each do |activity|
      if usersactivities_id.include? activity.id
      else
        activities = activities.flatten.reject {|a| a.id == activity.id}
      end
    end
    @all_activities = activities.flatten.sort_by(&:updated_at).reverse
    respond_to do |format|
      format.js
    end
  end

  CACHE Activity Load (0.0ms)  SELECT  "activities".* FROM "activities" WHERE "activities"."group_id" = $1 LIMIT $2  [["group_id", 1], ["LIMIT", 11]]
  ↳ /home/benjamin/.rbenv/versions/2.5.0/lib/ruby/gems/2.5.0/gems/activerecord-5.2.0.rc1/lib/active_record/log_subscriber.rb:98
NoMethodError (undefined method `id' for #<ActiveRecord::Relation []>
Did you mean?  ids):

app/controllers/activities_controller.rb:65:in `block in fetch_maj_activities'
app/controllers/activities_controller.rb:64:in `each'
app/controllers/activities_controller.rb:64:in `fetch_maj_activities'

  def fetch_maj_activities

    user = current_user
    activities = []
    usersactivities_id = current_user.user_activities.select('activity_id').map(&:activity_id).uniq

    user.groups.each do |group|
      activities << Activity.where(group: group)
    end



    usersactivities_id.each do |useractid|
      activities.flatten.each do |act|
        if act.id == useractid
          activities = activities.reject {|a|a}

        end
      end
    end

    @all_activities = activities.flatten.sort_by(&:updated_at).reverse
    respond_to do |format|
      format.js {render :action => "fetch_activities"}
    end
  end