Рельсы g миграция

Примеры кода

рельсы g миграция добавление столбцов

$ rails generate migration AddDetailsToProducts part_number:string price:decimal

как создать рельсы миграции

rails g migration AddPartNumberToProducts

activerecord добавить столбец

class AddPartNumberToProducts < ActiveRecord::Migration[6.0]
  def change
    add_column :products, :part_number, :string
  end
end

перенос базы данных ruby on rails

rails db:migrate

как создать таблицу SQL в ruby

def self.create_table
    sql = <<-SQL
      CREATE TABLE IF NOT EXISTS IF NOT EXISTS students (
        name TEXT,
        grade TEXT
      )
    SQL
    DB[:conn].execute(sql)
  end

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Рельсы g миграция

Примеры кода