Helpers::dumpSql: Fixed bool format for PgSql

Author: norbe

src/Database/Helpers.php

@@ -142,7 +142,10 @@ public static function dumpSql(SqlLiteral $query, ?Explorer $explorer = null): s
 				return '<i' . (isset($info['uri']) ? ' title="' . htmlspecialchars($info['uri'], ENT_NOQUOTES, 'UTF-8') . '"' : null)
 					. '>&lt;' . htmlspecialchars($type, ENT_NOQUOTES, 'UTF-8') . ' resource&gt;</i> ';
 
-			} elseif (is_bool($param)) {
+			} elseif (is_bool($param)) {				
+				if($connection->getDriver() instanceof Nette\Database\Drivers\PgSqlDriver) {
+					return $param ? 'true' : 'false';
+				}
 				return (string) (int) $param;
 
 			} else {

src/Database/Table/ActiveRow.php

@@ -106,7 +106,7 @@ public function getSignature(bool $throw = true): string
 	 * Returns referenced row.
 	 * @return self|null if the row does not exist
 	 */
-	public function ref(string $key, ?string $throughColumn = null): ?self
+	public function ref(string $key, ?string $throughColumn = null)
 	{
 		$row = $this->table->getReferencedTable($this, $key, $throughColumn);
 		if ($row === false) {