結合兩處查詢

Question

如何合併這兩個ActiveRecord關係？

activity1 = PublicActivity::Activity.where("user_recipients LIKE ':id,%' or user_recipients LIKE '%, :id' or user_recipients LIKE '%, :id,%' or user_recipients = ':id'", id: current_user.id) 

activity2 = PublicActivity::Activity.where(recipient_id: current_user.id, recipient_type: 'User') 

當我做到這一點，如果是空的，他們默認爲空單

@activity = activity1.merge(activity2) 

Answer 1

很簡單，爲什麼合併是返回空數組這是因爲它使用的查詢之間AND試試這個：

@activity = (activity1 + activity2)