From 71b810b7f4b15556bb5979154f8cf1ec45541ecb Mon Sep 17 00:00:00 2001
From: Koen Punt <koen@koenpunt.nl>
Date: Fri, 23 Jan 2015 13:02:15 +0100
Subject: [PATCH 1/2] add touch method to model

---
 lib/Model.php | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/lib/Model.php b/lib/Model.php
index 76a1e399a..f9456534b 100644
--- a/lib/Model.php
+++ b/lib/Model.php
@@ -1270,6 +1270,33 @@ public function set_timestamps()
 			$this->created_at = $now;
 	}
 
+	/**
+	 * Touch a model, updates `updated_at` and any other column given as argument.
+	 *
+	 * Please note that no validation is performed and only the after_touch, after_commit and after_rollback callbacks are executed.
+	 *
+	 * @param string|array $keys...
+	 * @return bool True if update succeeds
+	 * @throws ActiveRecord\ActiveRecordException if object is a new record
+	 */
+	public function touch($keys = array() /*[, $key...] */)
+	{
+		if($this->is_new_record())
+			throw new ActiveRecordException('Cannot touch on a new record object');
+
+		if(!is_array($keys))
+			$keys = func_get_args();
+
+		if(!in_array('updated_at', $keys))
+			$keys[] = 'updated_at';
+
+		$now = date('Y-m-d H:i:s');
+		$attributes = array_fill_keys($keys, $now);
+
+		$this->set_attributes($attributes);
+		return $this->update(false);
+	}
+
 	/**
 	 * Mass update the model with attribute data and saves to the database.
 	 *

From 5f13e8ebf52e43e34ea6457c3c3eb9dde3998b74 Mon Sep 17 00:00:00 2001
From: Koen Punt <koen@koenpunt.nl>
Date: Tue, 13 Jun 2017 23:24:37 +0200
Subject: [PATCH 2/2] add some tests

---
 test/ActiveRecordWriteTest.php | 42 ++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)

diff --git a/test/ActiveRecordWriteTest.php b/test/ActiveRecordWriteTest.php
index c0351413d..c84d6dbe1 100644
--- a/test/ActiveRecordWriteTest.php
+++ b/test/ActiveRecordWriteTest.php
@@ -441,4 +441,46 @@ public function test_update_our_datetime()
 		$this->assert_true($our_datetime === $author->some_date);
 	}
 
+	public function test_touch()
+	{
+		$author = Author::create(array('name' => 'MC Hammer'));
+		$updated_at = $author->updated_at = new DateTime('yesterday');
+		$author->save();
+		$author->touch();
+		$this->assertGreaterThan($updated_at, $author->updated_at);
+	}
+
+	/**
+	 * @expectedException ActiveRecord\ActiveRecordException
+	 * @expectedExceptionMessage Cannot touch on a new record object
+	 */
+	public function test_touch_on_new_record()
+	{
+		$author = new Author(array('name' => 'MC Hammer'));
+		$author->touch();
+	}
+
+	public function test_touch_with_additional_keys()
+	{
+		$author = Author::create(array('name' => 'MC Hammer'));
+		$updated_at = $author->updated_at = new DateTime('yesterday');
+		$some_date = $author->some_date = new DateTime('yesterday');
+		$author->save();
+		$author->touch(array('some_date'));
+		$this->assertGreaterThan($updated_at, $author->updated_at);
+		$this->assertGreaterThan($some_date, $author->some_date);
+	}
+
+	public function test_touch_with_scalar()
+	{
+		$author = Author::create(array('name' => 'MC Hammer'));
+		$updated_at = $author->updated_at = new DateTime('yesterday');
+		$some_date = $author->some_date = new DateTime('yesterday');
+		$author->save();
+		$author->touch('some_date');
+		$this->assertGreaterThan($updated_at, $author->updated_at);
+		$this->assertGreaterThan($some_date, $author->some_date);
+	}
+
+
 }