var dbm = global.dbm || require('db-migrate');
var type = dbm.dataType;

exports.up = function(db, callback) {
  db.createTable('sessions', {
    sid   : { type: 'string'   , notNull: true, primaryKey: true },
    sess  : { type: 'string'   , notNull: true },
    expire: { type: 'timestamp', notNull: true },
  }, callback);
};

exports.down = function(db, callback) {
  db.dropTable('sessions', callback);
};

@@ -216,39 +216,39 @@
 ess  : %7B type: '
-string'
+json'  
    , notNull: tr

Type of user session data is JSON