Fixing selected with interval not selecting the correct option. Fixes #70.

Author: markstory

cake/libs/view/helpers/form.php

@@ -1610,15 +1610,16 @@ function dateTime($fieldName, $dateFormat = 'DMY', $timeFormat = '12', $selected
 			}
 			$opt = implode($separator, $selects);
 		}
-
+		if (!empty($interval) && $interval > 1 && !empty($min)) {
+			$min = round($min * (1 / $interval)) * $interval;
+		}
+		$selectMinuteAttr['interval'] = $interval;
 		switch ($timeFormat) {
 			case '24':
-				$selectMinuteAttr['interval'] = $interval;
 				$opt .= $this->hour($fieldName, true, $hour, $selectHourAttr, $showEmpty) . ':' .
 				$this->minute($fieldName, $min, $selectMinuteAttr, $showEmpty);
 			break;
 			case '12':
-				$selectMinuteAttr['interval'] = $interval;
 				$opt .= $this->hour($fieldName, false, $hour, $selectHourAttr, $showEmpty) . ':' .
 				$this->minute($fieldName, $min, $selectMinuteAttr, $showEmpty) . ' ' .
 				$this->meridian($fieldName, $meridian, $selectMeridianAttr, $showEmpty);

cake/tests/cases/libs/view/helpers/form.test.php

@@ -3675,6 +3675,18 @@ function testDateTime() {
 			':',
 		);
 		$this->assertTags($result, $expected);
+
+		$result = $this->Form->input('published', array(
+			'timeFormat' => 24,
+			'interval' => 5,
+			'selected' => strtotime('2009-09-03 13:37:00'),
+			'type' => 'datetime'
+		));
+		$this->assertPattern('/<option[^<>]+value="2009"[^<>]+selected="selected"[^>]*>2009<\/option>/', $result);
+		$this->assertPattern('/<option[^<>]+value="09"[^<>]+selected="selected"[^>]*>September<\/option>/', $result);
+		$this->assertPattern('/<option[^<>]+value="03"[^<>]+selected="selected"[^>]*>3<\/option>/', $result);
+		$this->assertPattern('/<option[^<>]+value="13"[^<>]+selected="selected"[^>]*>13<\/option>/', $result);
+		$this->assertPattern('/<option[^<>]+value="35"[^<>]+selected="selected"[^>]*>35<\/option>/', $result);
 	}
 /**
  * testFormDateTimeMulti method