ruby-on-rails - 结合两个 where 查询

Question

如何合并这两个 ActiveRecord 关系？

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')

当我这样做时，如果一个是空的，他们默认为空的

@activity = activity1.merge(activity2)

Answer 1

为什么合并返回空数组很简单，因为它AND在查询之间使用试试这个：

@activity = (activity1 + activity2)