add column to existing table and new table for second display images

db/migrate/20180213050551_add_image_path_to_employees.rb

@@ -0,0 +1,9 @@
+class AddImagePathToEmployees < ActiveRecord::Migration[5.1]
+  def change
+    add_column :employees, :image_path, :string
+  end
+
+  def down
+  	remove_column :image_path
+  end
+end