clean code

app/controllers/jobs_controller.rb

@@ -12,7 +12,7 @@ class JobsController < ApplicationController
       @jobs = Job.by_companies(params[:company_id]).page(params[:page])
       @amount_job = Job.by_companies(params[:company_id]).count
     else
-      @jobs = Job.order("id DESC").page(params[:page])
+      @jobs = Job.order(id: :desc).page(params[:page])
       @amount_job = Job.count
     end
   end

app/models/job.rb

@@ -34,6 +34,8 @@ class Job < ApplicationRecord
   end
 
   def self.related_jobs(company_id, job_id)
-    @related_jobs ||= includes(:cities, :company).where("company_id = #{company_id} and id != #{job_id}").order(id: :desc).limit(10)
+    @related_jobs ||= includes(:cities, :company).where.not(id: job_id)
+                                                 .where(company_id: company_id)
+                                                 .limit(10)
   end
 end