[staging fix] Class 'ContentHelperAssociation' not found when editing a module in frontend

[infograf768]

Summary of Changes

Loading the class in SITE/components/com_content/models/articles.php

Testing Instructions

Set a multilingual site.
In Global Configuration allow Inline Editing for Modules & Menus

Edit Global Options for Articles and set Show associations to Show

Make sure you have some articles associated.

EDIT: Display on the page a mod_latest_news module.

Login frontend as super user and edit a module by clicking on the icon

Before patch

Protostar in error and Class 'ContentHelperAssociation' not found (this will show if debug is on)

After patch

All OK.

Note: The class is loaded in 4.0

[infograf768]

Folks, this is quite similar to #22525 in the sense that the issue happens only when editing a module in frontend.

[jsubri]

I was not able yet to reproduce with a custom template. Can you indicate if the problem occurs with J3.9 Beta 4 or staging?

[infograf768]

please test with protostar. page would display fo rexample a blog with these associated articles.

[csthomas]

Class ContentHelperAssociation in registered in components/com_content/content.php but modules (latest news) does not load this file. They load only components/com_content/models/articles.php.

[infograf768]

Indeed, just found this happens when that module is present on the page.

[infograf768]

@csthomas
Therefore do you see any other solution than the one proposed in this PR?

[csthomas]

My advice will not help, because I would like to remove the loading associations from the articles.php model and load them only in the views. Because removing associations from the model can be treated as a B/C break, we can not do anything more.

[csthomas]

There was a solution not to load tags for modules, added by Michael, but for associations it may not work. I suppose the modules like (latest news) do not require any associations.

[infograf768]

Indeed, these modules do not need associations.
Therefore, at least for 3.x, this PR is the only solution to keep B/C.
Please set your test OK on issues.joomla.org

@jsubri
Please test again after adding a Latest News module to the page.

[csthomas]

I have tested this item ✅ successfully on 09cb768

To see error I had to set 'Show Associations: Show' in article options.
Use Global (Show) do not work.

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