Pre-Deploy Command for Multi-Service Rails apps on Railway

bin_release.rb

#!/usr/bin/env ruby
require_relative "../config/environment"

# This release script safely runs database migrations while gracefully handling concurrent migrations
# when multiple services deploy simultaneously.
# Save it to `bin/release`, and configure it as the pre-deploy command in your Railway services.
#
# Remember to set the executable flag (`chmod +x bin/release`).

begin
  ActiveRecord::Tasks::DatabaseTasks.migrate_all
rescue ActiveRecord::ConcurrentMigrationError
  print '.'
  sleep 1
  retry
end