Known B/C break, the install adapters no longer extend JObject. Use
$parent->manifest->version instead on 4.0 (I don't remember if that
property is declared in 3.x off hand).

On Thu, Jun 1, 2017 at 5:49 PM Lodder notifications@github.com wrote:

Steps to reproduce the issue

In my module, I'm using the following to get the current version being
installed:

public function preflight($type, $parent)
{
$this->release = $parent->get('manifest')->version;
}

which was working fine in J3.x, however in J4 it results in:

Fatal error: Call to undefined method
Joomla\CMS\Installer\Adapter\ModuleAdapter::get()

System information (as much as possible)

• Joomla 4.0-nightly
• PHP 5.6 and 7.0.10

Module download to test

mod_shoutbox.zip
https://github.com/joomla/joomla-cms/files/1045330/mod_shoutbox.zip

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• Michael Please pardon any errors, this message was sent from my iPhone.

Yup, that seemed to work.

Can you please test if it works on J3 as well when directing accessing the property. Otherwise we need to port that back into J3.