Fix range filter zero(falsy) value

Author: K0nias

src/NetteDatabaseDataSource.php

@@ -296,11 +296,11 @@ protected function applyFilterRange(FilterRange $filter): void
 		$valueFrom = $conditions[$filter->getColumn()]['from'];
 		$valueTo   = $conditions[$filter->getColumn()]['to'];
 
-		if ($valueFrom) {
+		if ($valueFrom !== null && $valueFrom !== '') {
 			$this->applyWhere($filter->getColumn(), $valueFrom, '>=');
 		}
 
-		if ($valueTo) {
+		if ($valueTo !== null && $valueTo !== '') {
 			$this->applyWhere($filter->getColumn(), $valueTo, '<=');
 		}
 	}

tests/Cases/NetteDatabaseDataSourceTest.phpt

@@ -189,12 +189,16 @@ final class NetteDatabaseDataSourceTest extends TestCase
 		$filter5 = new FilterDate($this->grid, 'date', 'Date', 'date');
 		$filter5->setValue('12. 12. 2012');
 
+		$filter6 = new FilterRange($this->grid, 'range', 'Range', 'id', 'To');
+		$filter6->setValue(['from' => '', 'to' => 0]);
+
 		$s->filter([
 			$filter1,
 			$filter2,
 			$filter3,
 			$filter4,
 			$filter5,
+			$filter6
 		]);
 
 		$q = $s->getQuery();
@@ -214,7 +218,9 @@ final class NetteDatabaseDataSourceTest extends TestCase
 				AND id >= ?
 				AND DATE(created) >= ?
 				AND DATE(created) <= ?
-				AND DATE(date) = ?';
+				AND DATE(date) = ?
+				AND id <= ?
+			';
 
 		Assert::same(trim(preg_replace('/\s+/', ' ', $expected_query)), $q[0]);
 
@@ -228,6 +234,7 @@ final class NetteDatabaseDataSourceTest extends TestCase
 			'2003-02-01',
 			'2149-12-03',
 			'2012-12-12',
+			0,
 		];
 
 		Assert::same($expectedParams, $q[1]);