comment votes: add index page.

app/models/comment_vote.rb

@@ -10,6 +10,24 @@ class CommentVote < ApplicationRecord
   validate :validate_comment_can_be_down_voted
   validates_inclusion_of :score, :in => [-1, 1], :message => "must be 1 or -1"
 
+  def self.visible(user = CurrentUser.user)
+    return all if user.is_admin?
+    where(user: user)
+  end
+
+  def self.comment_matches(params)
+    return all if params.blank?
+    where(comment_id: Comment.search(params).reorder(nil).select(:id))
+  end
+
+  def self.search(params)
+    q = super
+    q = q.visible
+    q = q.search_attributes(params, :comment_id, :user, :score)
+    q = q.comment_matches(params[:comment])
+    q.apply_default_order(params)
+  end
+
   def validate_user_can_vote
     if !user.can_comment_vote?
       errors.add :base, "You cannot vote on more than 10 comments per hour"