/**
* Restricción: Entremedio de valores
* <br> $valor_menor < $field < $valor_mayor
* @param string $field
* @param string $valor
* @return string $stringRestriction
*/
public static function between($field, $valor_menor, $valor_mayor)
{
$restrictions = Restrictions::instance();
$restrictions->expr = Restrictions::gt($field, $valor_menor)->getExpr() . " AND " . Restrictions::lt($field, $valor_mayor)->getExpr();
return $restrictions;
}
