Fix: select top 9 cities, industries by job count

app/controllers/static_pages_controller.rb

@@ -4,8 +4,8 @@ class StaticPagesController < ApplicationController
 
 
     @latest_jobs = Job.all.limit(5)
     @latest_jobs = Job.all.limit(5)
 
 
-    @top_cities = City.all.limit(9)
+    @top_cities = City.joins(:job).group('jobs.city_id').order('count(jobs.city_id) desc').limit(9)
 
 
-    @top_categories = Category.all.limit(9)
+    @top_categories = Category.joins(:job_category).group('job_categories.category_id').order('count(job_categories.job_id) desc').limit(9)
   end
   end
 end
 end