A recent Drupal tutorial by Symphony Themes titled "Rating on parent nodes by comments' votes with Fivestar" has unveiled an efficient rating mechanism for parent nodes using the Fivestar module. This mechanism proves particularly useful for directory and shopping-themed websites, where users can leave their votes on comments, ultimately resulting in the parent listings displaying average ratings.

The tutorial simplifies the setup process for Drupal 9, and even Drupal 10 compatibility has been confirmed.

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The process begins with installing the Fivestar module and its dependencies, as detailed in the module guide. It's important to note that Fivestar seamlessly integrates with Drupal 9 and has been successfully tested with Drupal 10. Once installed, users can enable Fivestar via the admin interface or using the "drush en fivestar" command.

Next, users are guided to create a rating field on parent nodes, such as listings, and name it appropriately, e.g., "field_rating." The configuration involves selecting "Rated while editing" to ensure that users can only vote on the node through comments, maintaining the integrity of the rating system.

The final step involves creating a rating field on comments, where users can add their votes. This is where the tutorial reveals its uniqueness, as users are instructed to set the voting target by specifying "entity_id" as the target bridge field, linking comments' ratings to parent nodes. The target Fivestar field should also be set to the "field_rating" created for parent nodes. With this setup, the parent node will display the calculated average rating when users add comments with votes.

This Drupal tutorial offers a straightforward and efficient solution for implementing a rating system on parent nodes using the Fivestar module.