TableDefinitionExtensions.rb

namespace :db do
  task 'migrate_custom' do
    ActiveRecord::ConnectionAdapters::TableDefinition.prepend(
      CoreExtensions::ActiveRecord::ConnectionAdapters::TableDefinition
    )
    Rake::Task['db:migrate'].invoke
  end
end

module CoreExtensions
  module ActiveRecord
    module ConnectionAdapters
      module TableDefinition
        def coordinate(*args)
          options = args.extract_options!
          options.reverse_merge!({ precision: 12, scale: 7, default: 0.0 })
          column_names = args
          type = :decimal
          column_names.each { |name| column(name, type, options) }
        end

        def postal_code(*args)
          options = args.extract_options!
          options.reverse_merge!({ limit: 7, default: '', comment: '郵便番号' })
          column_names = args
          type = :string
          column_names.each { |name| column(name, type, options) }
        end

        def credit_card_number(*args)
          options = args.extract_options!
          options.reverse_merge!({ limit: 16, default: '', comment: 'クレジットカード番号' })
          column_names = args
          type = :string
          column_names.each { |name| column(name, type, options) }
        end

        def bank_account_number(*args)
          options = args.extract_options!
          options.reverse_merge!({ limit: 7, default: '', comment: '銀行口座番号' })
          column_names = args
          type = :string
          column_names.each { |name| column(name, type, options) }
        end

        def phone_number(*args)
          options = args.extract_options!
          options.reverse_merge!({ limit: 11, default: '', comment: '電話番号' })
          column_names = args
          type = :string
          column_names.each { |name| column(name, type, options) }
        end
      end
    end
  end
end