ruby on rails - How to sort by results of a method -


i have method on user.rb model in rails app returns reputation score based on user's various contributions site. 

   def total_votes     answerkarma = answervote.joins(:answer).where(answers: {user_id: self.id}).sum('value')      contributionkarma = contribution.where(user_id: self.id).sum('value')      answerkarma + contributionkarma    end

in index action of imaginary artists controller, retrieve artists, , retrieve filtered location

 def index        if params[:province_id]      province = params[:province_id]      province = province.to_i      @artistsbyprovince = user.artists_by_province(province)       else       @artists = user.where(:onionpealer => true)       end      end

if i'm filtering location, user model calls scope method

   scope :artists_by_province, lambda {|province|       joins(:contact).       where( contacts: {province_id: province},              users: {onionpealer: true})       }

what i'd do, however, is, in both cases (whether filtering location or retrieving users) sort retrieval of artists results of total_votes method, artists highest number of points appear @ top.

can suggest how might that. thank in advance.

if not pay attention on wrong query architecture, sorting can done ruby array#sort_by

@artistsbyprovince = user.artists_by_province(province).sort_by{ |u| -u.total_votes }

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