Overriding Template Suggestions in a Drupal Module

As developers, we often know how to override template suggestions in the Drupal theme directory. However, there are scenarios where you might want to override the template within a module. Simply creating the suggestion template in the module won't work because Drupal won't automatically recognize and use it.

So, how can we inform Drupal to pick the template from your module?

To make Drupal use your module's theme suggestion template, you need to implement the hook_theme function. For example, let's say you have a content type called "Project" and your view mode is "admin_table." This suggestion is available in the suggestion list, and you want Drupal to pick your template from your module's templates directory.

Here's how you can do it:

/**
 * Implements hook_theme().
 */
function MyModuleName_theme() {
  return [
    'node__project__admin_table' => [
      'base hook' => 'node',
    ],
  ];
}

After implementing the hook_theme function, create the template file under the templates directory in your module. That's it! Now, Drupal will use the template from your module.