dump_schema

# File activerecord/lib/active_record/tasks/database_tasks.rb, line 378
      def dump_schema(db_config, format = ActiveRecord::Base.schema_format) # :nodoc:
        require "active_record/schema_dumper"
        filename = dump_filename(db_config.name, format)
        connection = ActiveRecord::Base.connection

        FileUtils.mkdir_p(db_dir)
        case format
        when :ruby
          File.open(filename, "w:utf-8") do |file|
            ActiveRecord::SchemaDumper.dump(ActiveRecord::Base.connection, file)
          end
        when :sql
          structure_dump(db_config, filename)
          if connection.schema_migration.table_exists?
            File.open(filename, "a") do |f|
              f.puts connection.dump_schema_information
              f.print "\n"
            end
          end
        end
      end