ActiveRecord SQLite3 adapter with foreign key

sqlite3_adapter_with_foreign_key.rb

module ActiveRecord
  class Base
    class << self
      def sqlite3_connection_with_foreign_key(config)
        sqlite3_connection_without_foreign_key(config).tap do |db|
          db.execute("PRAGMA foreign_keys = ON") if config[:foreign_key]
        end
      end
      alias_method_chain :sqlite3_connection, :foreign_key
    end
  end
end