fix reviews 20200218 16:38

db/migrate/20200204084723_create_cities.rb

 class CreateCities < ActiveRecord::Migration[6.0]
   def change
     create_table :cities do |t|
-      t.column :area_id, :int
-      t.column :city_name, :string
-      t.column :city_description, :string
+      t.int :area_id
+      t.string :city_name
+      t.string :city_description
       t.timestamps
     end
-	  add_index :cities, :area_id
+    add_index :city_name
   end
 end

db/migrate/20200204084729_create_companies.rb

 class CreateCompanies < ActiveRecord::Migration[6.0]
   def change
     create_table :companies do |t|
-      t.column :company_name, :string
-      t.column :company_description, :text
-      t.column :address, :string
-      t.column :phone_number, :string
-      t.column :website, :string
-      t.column :email, :string
-      t.column :size, :int
+      t.string :company_name
+      t.text :company_description
+      t.string :address
+      t.string :phone_number
+      t.string :website
+      t.string :email
+      t.string :size
       t.timestamps
     end
-    add_index :companies, :email
+    add_index :companies_name
+    add_index :email
   end
 end

db/migrate/20200204084733_create_industries.rb

 class CreateIndustries < ActiveRecord::Migration[6.0]
   def change
     create_table :industries do |t|
-      t.column :industry_name, :text, :null => false
-      t.column :industry_description, :string
+      t.text :industry_name
+      t.string :industry_description
       t.timestamps
     end
   end

db/migrate/20200204084737_create_industry_jobs.rb

 class CreateIndustryJobs < ActiveRecord::Migration[6.0]
   def change
     create_table :industry_jobs do |t|
-      t.column :industry_id, :int, :null => false
-      t.column :job_id, :int, :null => false
+      t.int :industry_id
+      t.int :job_id
       t.timestamps
     end
   end

db/migrate/20200204084741_create_jobs.rb

 class CreateJobs < ActiveRecord::Migration[6.0]
   def change
     create_table :jobs do |t|
-      t.column :area_id, :int, :null => false
-      t.column :city_id, :int, :null => false
-      t.column :industry_id, :int, :null => false
-      t.column :company_id, :int, :null => false
-      t.column :code, :string, :null => false
-      t.column :job_name, :text, :null => false
-      t.column :salary, :string
-      t.column :deadline, :Date
-      t.column :level, :string
-      t.column :experience, :string
-      t.column :last_updated, :Date
-      t.column :description, :text
+      t.int :area_id
+      t.int :city_id
+      t.int :industry_id
+      t.int :company_id
+      t.text :job_name
+      t.string :salary
+      t.datetime :deadline
+      t.string :level
+      t.string :experience
+      t.datetime :last_updated
+      t.text :description
       t.timestamps
     end
   end

db/migrate/20200204084746_create_users.rb

 class CreateUsers < ActiveRecord::Migration[6.0]
   def change
     create_table :users do |t|
-     t.column :email, :string, :null => false
-     t.column :fname, :string, :null => false
-     t.column :lname, :string, :null => false
-     t.column :role, :int, :null => false
-     t.column :remember_digest, :string
-     t.column :activation_digest, :string
-     t.column :activated, :Boolean
-     t.column :activated_at, :timestamp
-     t.column :reset_digest, :string
-     t.column :reset_sent_at, :timestamp
-     t.column :password_digest, :string
+     t.string :email
+     t.string :fname
+     t.string :lname
+     t.int :role
+     t.string :remember_digest
+     t.string :activation_digest
+     t.boolean :activated
+     t.datetime :activated_at
+     t.string :reset_digest
+     t.datetime :reset_sent_at
+     t.string :password_digest
      t.timestamps
     end
   end

db/migrate/20200204084750_create_saved_jobs.rb

 class CreateSavedJobs < ActiveRecord::Migration[6.0]
   def change
     create_table :saved_jobs do |t|
-      t.column :user_id, :int, :null => false
-      t.column :job_id, :int, :null => false
+      t.int :user_id
+      t.int :job_id
       t.timestamps
     end
   end

db/migrate/20200204084755_create_applied_jobs.rb

 class CreateAppliedJobs < ActiveRecord::Migration[6.0]
   def change
     create_table :applied_jobs do |t|
-      t.column :user_id, :int, :null => false
-      t.column :job_id, :int, :null => false
+      t.int :user_id
+      t.int :job_id
       t.timestamps
     end
   end