Ruby on rails 如何按属性和对模型进行排序?
我有一个由序列化程序表示的艺术家模型Ruby on rails 如何按属性和对模型进行排序?,ruby-on-rails,ruby,ruby-on-rails-3,sql-order-by,Ruby On Rails,Ruby,Ruby On Rails 3,Sql Order By,我有一个由序列化程序表示的艺术家模型 class ArtistSerializer < ActiveModel::Serializer attributes :id, :name, :followers_total_count def followers_total_count [ object.facebook_like_count, object.soundcloud_like_count,
class ArtistSerializer < ActiveModel::Serializer
attributes :id,
:name,
:followers_total_count
def followers_total_count
[
object.facebook_like_count,
object.soundcloud_like_count,
object.instagram_like_count,
object.twitter_like_count,
object.mixcloud_like_count,
object.youtube_like_count
].map(&:to_i).reduce(:+)
end
end
类ArtistSerializer- facebook_like_count=>100
- twitter\u like\u count=>50
- instagram_like_计数=>20
- twitter\u like\u count=>1000
顺序应该是[Artist2,Artist1]假设
:followers\u total\u count
是一个整数,您可以尝试以下操作
Artist.order(:followers_total_count, :desc)