schema_up_to_date?

# File activerecord/lib/active_record/tasks/database_tasks.rb, line 339
      def schema_up_to_date?(configuration, format = ActiveRecord::Base.schema_format, file = nil, environment = nil, name = nil)
        db_config = resolve_configuration(configuration)

        if environment || name
          ActiveSupport::Deprecation.warn("`environment` and `name` will be removed as parameters in 7.0.0, you may now pass an ActiveRecord::DatabaseConfigurations::DatabaseConfig as `configuration` instead.")
        end

        name ||= db_config.name

        file ||= dump_filename(name, format)

        return true unless File.exist?(file)

        ActiveRecord::Base.establish_connection(db_config)

        return false unless ActiveRecord::InternalMetadata.enabled?
        return false unless ActiveRecord::InternalMetadata.table_exists?

        ActiveRecord::InternalMetadata[:schema_sha1] == schema_sha1(file)
      end