history_jobs doing

app/controllers/jobs_controller.rb

 class JobsController < ApplicationController
   def show
     @job_detail = Job.find_by_id(params[:id])
+    HistoryJob.find_or_create_by(job_id: @job_detail.id, user_id: current_user)
   end
 
   def index

app/models/history_job.rb

+class HistoryJob < ApplicationRecord
+   belongs_to :job
+   belongs_to :user
+end
\ No newline at end of file

db/migrate/20200505042407_create_history_jobs.rb

+class CreateHistoryJobs < ActiveRecord::Migration[6.0]
+  def change
+    create_table :history_jobs do |t|
+      t.integer :user_id
+      t.integer :job_id
+      t.timestamps	    
+    end
+  end
+end

db/schema.rb

@@ -10,7 +10,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_03_09_014715) do
+ActiveRecord::Schema.define(version: 2020_05_05_042407) do
 
   create_table "applied_jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
     t.integer "user_id"
@@ -48,6 +48,13 @@ ActiveRecord::Schema.define(version: 2020_03_09_014715) do
     t.index ["email"], name: "index_companies_on_email"
   end
 
+  create_table "history_jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
+    t.integer "user_id"
+    t.integer "job_id"
+    t.datetime "created_at", precision: 6, null: false
+    t.datetime "updated_at", precision: 6, null: false
+  end
+
   create_table "industries", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8", force: :cascade do |t|
     t.text "industry_name"
     t.string "industry_description"