Backport 4c40204 for Craft 2

(#2824)

CHANGELOG-v2.md

@@ -3,6 +3,7 @@
 ## Unreleased
 
 ### Changed
+- Single sections’ entry types’ handles are now updated to match their section’s handle whenever the section is saved. ([#2824](https://github.com/craftcms/cms/issues/2824))
 - Updated Garnish to 0.1.28.
 - Animated gif thumbnails are no longer animated. ([#3110](https://github.com/craftcms/cms/issues/3110))
 - From now on an exception will be thrown if an asset if uploaded sucecssfully, but the record couldn't be saved.

src/services/SectionsService.php

@@ -602,10 +602,14 @@ public function saveSection(SectionModel $section)
 							if (!$isNewSection)
 							{
 								// Re-save the entrytype name if the section name just changed
-								if (!$isNewSection && $oldSection->name != $section->name)
+								if (!$isNewSection && (
+									$oldSection->name != $section->name ||
+									$oldSection->handle != $section->handle
+								))
 								{
 									$entryType = $this->getEntryTypeById($entryTypeId);
 									$entryType->name = $section->name;
+									$entryType->handle = $section->handle;
 									$this->saveEntryType($entryType);
 								}