如何在设置Rails实例变量时将OR添加到where语句中？

Question

如何在Rails控制器中设置我的实例变量时将“OR”添加到此语句中？

@activities = PublicActivity::Activity.order("created_at DESC").where(owner_type: "User", owner_id: current_user.followed_users.map {|u| u.id}).where("owner_id IS NOT NULL").page(params[:page]).per_page(20)

我想@activities设定在owner_id等于或者current_user.id或current_user.followed_users记录。我试着加入.where(owner_id: current_user.id)，但似乎否定了整个查询，我根本得不到结果。查询这个样子后，我加入到它：

@activities = PublicActivity::Activity.order("created_at DESC").where(owner_type: "User", owner_id: current_user.followed_users.map {|u| u.id}).where(owner_id: current_user.id).where("owner_id IS NOT NULL").page(params[:page]).per_page(20)

我如何添加OR条件让我拉记录，其中owner_id或者是CURRENT_USER或current_user.followed_users？

谢谢！

Answer 1

快速修复是将current_user的id包含在数组中。

# Also use pluck instead of map 
ids = current_user.followed_users.pluck(:id) << current_user.id 
PublicActivity::Activity.order("created_at DESC") 
    .where(owner_type: "User", owner_id: ids).page(params[:page]) 

Answer 2

Rails不支持“或”直接在此背景下，让你无论是要重建你的查询，以避免它（如图the answer from Billy Chan）或提供SQL作为参数传递给where如下所示：

.where("owner_type = 'User' and (owner_id = ? OR owner_id in (?))", current_user.id, 
    current_user.followed_users.pluck(:id)) 

Answer 3

@activities = PublicActivity::Activity.order("created_at DESC").where(owner_type: "User", owner_id: current_user.followed_users.map(&:id)+[current_user.id]).page(params[:page]).per_page(20) 

一号线的解决方案:)