rails g migração adicionar colunas
$ rails generate migration AddDetailsToProducts part_number:string price:decimal
como criar eixos de migração
rails g migration AddPartNumberToProducts
activerecord Adicionar coluna
class AddPartNumberToProducts < ActiveRecord::Migration[6.0]
def change
add_column :products, :part_number, :string
end
end
utilização de SQL na migração de Carris
def change
execute <<-SQL
UPDATE table1
SET column1 = "value"
SQL
end
ruby on rails DB migrar
rails db:migrate
Rials db down
bin/rails db:migrate:down VERSION=YYYYMMDDHHMMSS