[5.x]: Attempt to read property "type" on null when editing Matrix entries on front-end

[shifuma]

What happened?

Description

I'm trying to create a front-end entry edit form, but getting Attempt to read property "type" on null.

Steps to reproduce

1. Use the example entry form as a basis to create a form to edit a Matrix entry

{% set entry = craft.entries().id(1).one() %}

<form method="post" accept-charset="UTF-8">
  {{ csrfInput() }}
  {{ actionInput('entries/save-entry') }}

  {# {{ hiddenInput('sectionId', entry.sectionId) }} -- this is the problem as Matrix entries don't have a section #}
  {{ hiddenInput('typeId', entry.typeId) }}
  {{ hiddenInput('entryId', entry.id) }}
  {{ hiddenInput('enabled', true) }}

  <label for="title">Title</label>
  {{ input('text', 'title', entry.title, {id: 'title',}) }}
  {{ _self.errorList(entry.getErrors('title')) }}

  <button type="submit">Publish</button>
</form>

Expected behavior

Able to save a Matrix entry like regular entries on the front-end.

Actual behavior

Because Matrix entries don't have a section you get this error: yii\base\ErrorException: Attempt to read property "type" on null in /var/www/html/packages/cms/src/controllers/EntriesController.php:252

cms/src/controllers/EntriesController.php

Lines 248 to 254 in 5f69bc4

	if (
	$entry->id &&
	!$duplicate &&
	!in_array($currentUser->id, $entry->getAuthorIds(), true) &&
	$section->type !== Section::TYPE_SINGLE &&
	$entry->enabled
	) {

---

I've tried adding:

{{ hiddenInput('fieldId', 1) }}
{{ hiddenInput('ownerId', entry.ownerId)}}

As per #15345 but that doesn't help. Is there something else I need to add or is this a bug?

Craft CMS version

5.4.3

PHP version

No response

Operating system and version

No response

Database type and version

No response

Image driver and version

No response

Installed plugins and versions

No response

[brandonkelly]

Thanks for reporting that! Just fixed for the next release.

To test the fix early, change your craftcms/cms requirement in composer.json to

"craftcms/cms": "5.x-dev as 5.4.4",

[brandonkelly]

Craft 5.4.5 is out with that fix. Thanks again!