如何在設置Rails實例變量時將OR添加到where語句中？

Question

如何在Rails控制器中設置我的實例變量時將「OR」添加到此語句中？

@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設定在owner_id等於或者current_user.id或current_user.followed_users記錄。我試着加入.where(owner_id: current_user.id)，但似乎否定了整個查詢，我根本得不到結果。查詢這個樣子後，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條件讓我拉記錄，其中owner_id或者是CURRENT_USER或current_user.followed_users？

謝謝！

Answer 1

快速修復是將current_user的id包含在數組中。

# 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，讓你無論是要重建你的查詢，以避免它（如圖the answer from Billy Chan）或提供SQL作爲參數傳遞給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) 

一號線的解決方案:)