 
                 sql += "ALTER TABLE %I ADD COLUMN %I ";
 
+                if (props[key].isUnique) { sql += "UNIQUE "; }
+
                 /* Handle composite types */
                 if (type.relation) {
                   sql += "integer;";

      case "DELETE":
        return _delete(obj);
      }
    },

    /**

    now: function () {
      return new Date();
    },

    /**
      Request.
