rails g migración añadir columnas
$ rails generate migration AddDetailsToProducts part_number:string price:decimal
cómo crear carriles de migración
rails g migration AddPartNumberToProducts
activerecord agregar columna
class AddPartNumberToProducts < ActiveRecord::Migration[6.0]
def change
add_column :products, :part_number, :string
end
end
uso de SQL en la migración de rails
def change
execute <<-SQL
UPDATE table1
SET column1 = "value"
SQL
end
migración de ruby on rails db
rails db:migrate
rials db down
bin/rails db:migrate:down VERSION=YYYYMMDDHHMMSS