Infinite recursion when using Twig accessors on fields that are NULL #78
Description
In Paris 1.4.1 and Idiorm 1.4.0, when trying to access DB fields with NULL as value from Twig (via {{ object.field }}), I get infinite recursions.
This is when building the object using find_one(), or find_many() with a Twig loop, while find_array() works as expected.
Here's a barebones system that should demonstrate the problem:
DB (MySQL):
CREATE TABLE IF NOT EXISTS `twig_test` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`requiredField` varchar(128) NOT NULL,
`nullableField` varchar(128),
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
INSERT INTO `twig_test` (`requiredField`, `nullableField`) VALUES ('first set', 'optional first data');
INSERT INTO `twig_test` (`requiredField`) VALUES ('second set');
INSERT INTO `twig_test` (`requiredField`, `nullableField`) VALUES ('third set', 'optional third data');
Model and Slim Route:
class TwigTest extends Model {}
$app->get(
'/twigtest',
function() use ($app) {
$testdata = Model::factory('TwigTest')->find_many();
$app->render('twigtest.html.twig', ['testdata' => $testdata]);
}
);
Twig:
{% for row in testdata %}
{{ row.requiredField }} // {{ row.nullableField }}<br/>
{% endfor %}
This always throws an infinite recursion to which Xdebug predictably reacts with:
Fatal error: Maximum function nesting level of '100' reached, aborting! in /[...]/paris.php on line 522
Twig does not render the third output line (corresponding to the third db row) after that. As soon as I replace find_many() with find_array() in the Slim Route, it all works.
Also, the infinite recursion occurs when using Twig's {% if row.nullableField %}, but not when using {% if row.nullableField is defined %}. The latter always returns true - interestingly enough on ANY field name, even nonexistent ones, which is something I would maybe regard as a bug as well.
Using j4mie/paris 1.4.1, j4mie/idiorm 1.4.0, slim/slim 2.3.5, slim/views 0.1.0, twig/twig 1.14.2.