Fix review 11/05/2020

app/models/city.rb

 class City < ApplicationRecord
+  validates :title, presence: true
+  
   has_and_belongs_to_many :jobs
 end

app/models/company.rb

 class Company < ApplicationRecord
+  validates :title, presence: true
+  
   has_many :jobs
 end

app/models/industry.rb

 class Industry < ApplicationRecord
+  validates :title, presence: true
+  
   has_and_belongs_to_many :jobs
 end

app/models/job.rb

 class Job < ApplicationRecord
+  validates :title, presence: true
+
   belongs_to :company
 
   has_many :applies

db/migrate/20200511055632_add_columns_to_jobs.rb

+class AddColumnsToJobs < ActiveRecord::Migration[6.0]
+  def change
+    add_column :jobs, :min_salary, :bigint, :default => 0
+    add_column :jobs, :max_salary, :bigint, :default => 0
+    add_column :jobs, :benefit, :text
+    add_column :jobs, :job_requirements, :text
+    add_column :jobs, :other_information, :text
+  end
+end

db/schema.rb

@@ -10,9 +10,9 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_04_23_044651) do
+ActiveRecord::Schema.define(version: 2020_05_11_055632) do
 
-  create_table "admins", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "admins", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
     t.string "reset_password_token"
@@ -24,7 +24,7 @@ ActiveRecord::Schema.define(version: 2020_04_23_044651) do
     t.index ["reset_password_token"], name: "index_admins_on_reset_password_token", unique: true
   end
 
-  create_table "applies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "applies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.bigint "job_id", null: false
     t.datetime "created_at", precision: 6, null: false
@@ -33,21 +33,21 @@ ActiveRecord::Schema.define(version: 2020_04_23_044651) do
     t.index ["user_id"], name: "index_applies_on_user_id"
   end
 
-  create_table "cities", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "cities", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "title"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
     t.boolean "foreign", default: false
   end
 
-  create_table "cities_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "cities_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.bigint "city_id", null: false
     t.bigint "job_id", null: false
     t.index ["city_id", "job_id"], name: "index_cities_jobs_on_city_id_and_job_id"
     t.index ["job_id", "city_id"], name: "index_cities_jobs_on_job_id_and_city_id"
   end
 
-  create_table "companies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "companies", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "title"
     t.string "address"
     t.string "logo"
@@ -56,7 +56,7 @@ ActiveRecord::Schema.define(version: 2020_04_23_044651) do
     t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "favorites", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "favorites", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.bigint "user_id", null: false
     t.bigint "job_id", null: false
     t.datetime "created_at", precision: 6, null: false
@@ -65,20 +65,20 @@ ActiveRecord::Schema.define(version: 2020_04_23_044651) do
     t.index ["user_id"], name: "index_favorites_on_user_id"
   end
 
-  create_table "industries", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "industries", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "title"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
   end
 
-  create_table "industries_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "industries_jobs", id: false, options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.bigint "industry_id", null: false
     t.bigint "job_id", null: false
     t.index ["industry_id", "job_id"], name: "index_industries_jobs_on_industry_id_and_job_id"
     t.index ["job_id", "industry_id"], name: "index_industries_jobs_on_job_id_and_industry_id"
   end
 
-  create_table "jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "jobs", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "title"
     t.string "updated_date_job"
     t.string "level"
@@ -89,10 +89,15 @@ ActiveRecord::Schema.define(version: 2020_04_23_044651) do
     t.bigint "company_id"
     t.datetime "created_at", precision: 6, null: false
     t.datetime "updated_at", precision: 6, null: false
+    t.bigint "min_salary", default: 0
+    t.bigint "max_salary", default: 0
+    t.text "benefit"
+    t.text "job_requirements"
+    t.text "other_information"
     t.index ["company_id"], name: "index_jobs_on_company_id"
   end
 
-  create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_0900_ai_ci", force: :cascade do |t|
+  create_table "users", options: "ENGINE=InnoDB DEFAULT CHARSET=utf8mb4", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
     t.string "reset_password_token"