Fix errors reading postgres timestamp columns.

Timestamp columns from postgres often include the milliseconds. Since
that data cannot be stored in DateTime instances, we should chop it off.

Fixes #3087

src/Database/Type/DateTimeType.php

@@ -56,8 +56,8 @@ class DateTimeType extends \Cake\Database\Type {
 		if ($value === null) {
 			return null;
 		}
-		$value = DateTime::createFromFormat($this->_format, $value);
-		return $value;
+		list($value) = explode('.', $value);
+		return DateTime::createFromFormat($this->_format, $value);
 	}
 
 /**

tests/TestCase/Database/Type/DateTimeTypeTest.php

@@ -1,7 +1,5 @@
 <?php
 /**
- * PHP Version 5.4
- *
  * CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
  * Copyright (c) Cake Software Foundation, Inc. (http://cakefoundation.org)
  *
@@ -55,6 +53,20 @@ class DateTimeTypeTest extends TestCase {
 	}
 
 /**
+ * Test datetime parsing when value include milliseconds.
+ *
+ * Postgres includes milliseconds in timestamp columns,
+ * data from those columns should work.
+ *
+ * @return void
+ */
+	public function testToPHPIncludingMilliseconds() {
+		$in = '2014-03-24 20:44:36.315113';
+		$result = $this->type->toPHP($in, $this->driver);
+		$this->assertInstanceOf('\DateTime', $result);
+	}
+
+/**
  * Test converting to database format
  *
  * @return void