ActiveRow: __isset checks the existence of the relation (#196)

Author: miranovy

src/Database/Table/ActiveRow.php

@@ -287,6 +287,13 @@ public function __isset($key)
 		if ($this->accessColumn($key)) {
 			return isset($this->data[$key]);
 		}
+
+		$referenced = $this->table->getReferencedTable($this, $key);
+		if ($referenced !== false) {
+			$this->accessColumn($key, false);
+			return (bool) $referenced;
+		}
+
 		$this->removeAccessColumn($key);
 		return false;
 	}

tests/Database/Table/Table.discoveredReflection.phpt

@@ -80,9 +80,9 @@ test(function () use ($context) {
 	Assert::true(empty($book->translator_id));
 	Assert::false(isset($book->test));
 
-	Assert::false(isset($book->author));
+	Assert::true(isset($book->author));
 	Assert::false(isset($book->translator));
-	Assert::true(empty($book->author));
+	Assert::false(empty($book->author));
 	Assert::true(empty($book->translator));
 });
 

tests/Database/Table/bugs/ActiveRow.__isset().phpt

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * @dataProvider? ../databases.ini
+ */
+
+declare(strict_types=1);
+
+use Tester\Assert;
+
+require __DIR__ . '/../../connect.inc.php'; // create $connection
+
+Nette\Database\Helpers::loadFromFile($connection, __DIR__ . "/../../files/{$driverName}-nette_test1.sql");
+
+
+test(function () use ($context) {
+	$row = $context->table('book')->get(2);
+	Assert::same('Jakub Vrana', $row->author->name);
+	Assert::true(isset($row->author->name));
+});