如何生成 ActiveRecord 关系并确保在集合中包含特定对象？

Question

我想生成如下所示的 ActiveRecord 关系：

@profiles = Profile.published.order("RANDOM()").limit(8) + Profile.where(demo_linked: true)

上面的问题是它 returns 一个数组，这是我不想要的。

我希望以上是一个 ActiveRecord 关系。

想法？

Answer 1

如guides所述：

random_published_profiles = Profile.published.order("RANDOM()").limit(8)
demo_linked_profiles = Profile.where(demo_linked: true)

all_profiles = random_published_profiles.merge(demo_linked_profiles)

Answer 2

我最终得到了它：

    @selected_profile = Profile.published.where(demo_linked: true)
    @random_profiles = Profile.published.order("RANDOM()").limit(8).where.not(id: @selected_profile.pluck(:id))
    @profiles = @random_profiles + @selected_profile

如何生成 ActiveRecord 关系并确保在集合中包含特定对象？

How do I generate an ActiveRecord Relation and make sure to include specific objects within the collection?

activerecord

ruby-on-rails

ruby-on-rails-5