Fixes phalcon#12766

CHANGELOG.md

@@ -1,6 +1,7 @@
 # [3.1.2](https://github.com/phalcon/cphalcon/releases/tag/v3.1.2) (2017-XX-XX)
 - Fixed PHP 7.1 issues [#12055](https://github.com/phalcon/cphalcon/issues/12055)
 - Fixed `Imagick::getVersion()` error in some system [#12729](https://github.com/phalcon/cphalcon/pull/12729)
+- Fixed `Phalcon\Mvc\Model::_doLowInsert` to properly set snapshot when having default values and public properties [#12766](https://github.com/phalcon/cphalcon/issues/12766)
 
 # [3.1.1](https://github.com/phalcon/cphalcon/releases/tag/v3.1.1) (2017-03-25)
 - Fixed undefined index warning on existing cached resultsets

phalcon/mvc/model.zep

@@ -2290,7 +2290,10 @@ abstract class Model implements EntityInterface, ModelInterface, ResultInterface
 					if fetch value, this->{attributeField} {
 
 						if value === null && isset defaultValues[field] {
+							let snapshot[attributeField] = null;
 							let value = connection->getDefaultValue();
+						} else {
+							let snapshot[attributeField] = value;
 						}
 
 						/**
@@ -2301,7 +2304,6 @@ abstract class Model implements EntityInterface, ModelInterface, ResultInterface
 						}
 
 						let fields[] = field, values[] = value, bindTypes[] = bindType;
-						let snapshot[attributeField] = value;
 					} else {
 
 						if isset defaultValues[field] {

tests/_data/models/DynamicUpdate/Robots.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Phalcon\Test\Models\DynamicUpdate;
+
+use Phalcon\Mvc\Model;
+use Phalcon\Test\Models\RobotsParts;
+
+/**
+ * \Phalcon\Test\Models\DynamicUpdate\Robots
+ *
+ * @copyright 2011-2017 Phalcon Team
+ * @link      https://phalconphp.com
+ * @author    Andres Gutierrez <[email protected]>
+ * @author    Serghei Iakovlev <[email protected]>
+ * @package   Phalcon\Test\Models\DynamicUpdate
+ *
+ * @property int $id
+ * @property string $name
+ * @property string $type
+ * @property int $year
+ * @property string $datetime
+ * @property string $deleted
+ * @property string $text
+ *
+ * @method static Robots findFirst($parameters = null)
+ * @method static Robots[] find($parameters = null)
+ *
+ * The contents of this file are subject to the New BSD License that is
+ * bundled with this package in the file docs/LICENSE.txt
+ *
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world-wide-web, please send an email to [email protected]
+ * so that we can send you a copy immediately.
+ */
+class Robots extends Model
+{
+    public $year;
+
+    public function initialize()
+    {
+        $this->hasMany('id', RobotsParts::class, 'robots_id');
+
+        $this->useDynamicUpdate(true);
+    }
+}

tests/unit/Mvc/Model/DynamicUpdateTest.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Phalcon\Test\Unit\Mvc\Model;
+
+use Phalcon\Test\Models\DynamicUpdate\Robots;
+use Phalcon\Test\Module\UnitTest;
+
+/**
+ * \Phalcon\Test\Unit\Mvc\Model\DynamicUpdateTest
+ * Tests the Phalcon\Mvc\Model component
+ *
+ * @copyright (c) 2011-2017 Phalcon Team
+ * @link      https://phalconphp.com
+ * @author    Andres Gutierrez <[email protected]>
+ * @author    Serghei Iakovlev <[email protected]>
+ * @author    Wojciech Ślawski <[email protected]>
+ * @package   Phalcon\Test\Unit\Mvc\Model
+ *
+ * The contents of this file are subject to the New BSD License that is
+ * bundled with this package in the file docs/LICENSE.txt
+ *
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world-wide-web, please send an email to [email protected]
+ * so that we can send you a copy immediately.
+ */
+class DynamicUpdateTest extends UnitTest
+{
+    /**
+     * Tests dynamic update create then update
+     *
+     * @author Wojciech Ślawski <[email protected]>
+     * @issue 12766
+     * @since  2017-04-04
+     */
+    public function testIssue12766()
+    {
+        $robots = new Robots();
+        $robots->name = 'Test';
+        $robots->type = 'mechanical';
+        $robots->datetime = (new \DateTime())->format('Y-m-d');
+        $robots->text = 'text';
+
+        $robots->create();
+
+        $robots->year = 2017;
+        $robots->update();
+    }
+}