Model#search: refactor searching for attributes.

app/models/post_flag.rb

@@ -51,7 +51,8 @@ class PostFlag < ApplicationRecord
     def search(params)
       q = super
 
-      q = q.attribute_matches(:reason, params[:reason_matches])
+      q = q.search_attributes(params, :post, :is_resolved)
+      q = q.text_attribute_matches(:reason, params[:reason_matches])
 
       # XXX
       if params[:creator_id].present?
@@ -74,9 +75,6 @@ class PostFlag < ApplicationRecord
         end
       end
 
-      q = q.search_post_id_attribute(params)
-      q = q.attribute_matches(:is_resolved, params[:is_resolved])
-
       case params[:category]
       when "normal"
         q = q.where("reason NOT IN (?) AND reason NOT LIKE ?", [Reasons::UNAPPROVED, Reasons::BANNED], Reasons::REJECTED)