```ruby
class CreateAdministrators < ActiveRecord::Migration
  def change
    create_table :administrators do |t|

      t.timestamps null: false
    end
  end
end
```

Set migrate file in administrators table
user
```ruby
class CreateAdministrators < ActiveRecord::Migration
  def change
    create_table :administrators do |t|
      t.string :email, null: false
      t.string :email_for_index, null: false
      t.string :hashed_password
      t.boolean :suspended, null: false, default: false

      t.timestamps null: false
    end
    add_index :administrators, :email_for_index, unique: true
  end
end
```
assistant