code: final public boolean exists() {
  		final Model m = Query.one(
  				getClass(),
  				String.format("SELECT * FROM %s WHERE %s LIMIT 1",
  						Utils.getTableName(getClass()),
  						Utils.getWhereStatement(this))).get();
  		return m != null;
  	}
docs: Check whether this model exists in the database
  
  @return true if this model is currently saved in the database (could be an older version)