>>> [!note] Migrated issue <!-- Drupal.org comment --> <!-- Migrated from issue #3233398. --> Reported by: [dww](https://www.drupal.org/user/46549) >>> <h3 id="summary-problem-motivation">Problem/Motivation</h3> <p>From the wise mind of @Berdir at <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-7"><a href="https://www.drupal.org/project/drupal/issues/2570593" title="Status: Closed (fixed)">#2570593: Allow entities to be subclassed using "bundle classes"</a></span>:</p> <blockquote><p> One thought I had in to another issue would be to use this in forum.module for its special vocabulary and node type. That could be a big step to transform that module from a forgotten and ignored thing to a decent example and a real-word demonstration of this feature. Might also allow us to fix <span class="drupalorg-gitlab-issue-link drupalorg-gitlab-link-wrapper"><a href="https://git.drupalcode.org/project/forum/-/work_items/2010132" class="drupalorg-gitlab-link">https://git.drupalcode.org/project/forum/-/work_items/2010132</a></span> although I'm still unsure about that feature, should probably use aliases instead<br> ...<br> An early proof of concept might help to convince anyone who still doubts that this is useful though :) </p></blockquote> <p>To which @larowlan replied:</p> <blockquote><p> Great idea, forum is the ideal use case </p></blockquote> <h4 id="summary-steps-reproduce">Steps to reproduce</h4> <p>N/A</p> <h3 id="summary-proposed-resolution">Proposed resolution</h3> <ul> <li>Add a <code>ForumNode</code> bundle class.</li> <li>Put stuff in there.</li> </ul> <h3 id="summary-remaining-tasks">Remaining tasks</h3> <ol> <li>Land <span class="drupalorg-gitlab-issue-link project-issue-status-info project-issue-status-7"><a href="https://www.drupal.org/project/drupal/issues/2570593" title="Status: Closed (fixed)">#2570593: Allow entities to be subclassed using "bundle classes"</a></span></li> <li>Define a <code>ForumNode</code> class.</li> <li>Register it with the entity system.</li> <li>Decide what to put in there.</li> <li>...</li> </ol> <h3 id="summary-ui-changes">User interface changes</h3> <p>Hopefully none.</p> <h3 id="summary-api-changes">API changes</h3> <p>TBD.</p> <h3 id="summary-data-model-changes">Data model changes</h3> <p>Nope.</p> <h3 id="summary-release-notes">Release notes snippet</h3> <p>TBD.</p> > Related issue: [Issue #2570593](https://www.drupal.org/node/2570593)