reconstruct_from_schema

# File activerecord/lib/active_record/tasks/database_tasks.rb, line 351
      def reconstruct_from_schema(configuration, format = ActiveRecord::Base.schema_format, file = nil, environment = env, spec_name = "primary") # :nodoc:
        file ||= dump_filename(spec_name, format)

        check_schema_file(file)

        ActiveRecord::Base.establish_connection(configuration)

        if schema_up_to_date?(configuration, format, file, environment, spec_name)
          truncate_tables(configuration)
        else
          purge(configuration)
          load_schema(configuration, format, file, environment, spec_name)
        end
      rescue ActiveRecord::NoDatabaseError
        create(configuration)
        load_schema(configuration, format, file, environment, spec_name)
      end