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Create a custom module and alter the content on a node page using a hook and existing theme functions.
Goal
Add custom links to the Movie Review page using hook_node_view().
Prerequisites
You will need the following knowledge and skills. If you need a review, check out the Additional resources section at the bottom of this page.
- How to create a custom module.
- Understand how to add custom content to the "Movie Review" page.
- How to use existing theme functions to create markup.
Tasks
Create a custom module with info and module files.
Use
hook_node_view to replace the default Genre taxonomy links with custom links on the Movie Review page. The URL format of the new links should be as follows: <a href="/reviews/{genre}”>{genre}</a>.
The links should be in an unordered list.
Both the links and list should be themed using existing Drupal functions.
Recap
- We can alter markup within a node page by using the
node_viewhook. - Markup should be generated only by existing theme functions where possible.
Further your understanding
- Continue to the next lesson: Movie Project: Change a Page Programmatically.
Additional resources
- Video: Anatomy of a Drupal Module (Drupalize.Me)
- Understanding the hook system for Drupal modules (Drupal.org)
- Video: The Event-Driven Hook System (Drupalize.Me)
- API Documentation: hook_node_view (api.drupal.org)
- Video: Integrating with the Theme System (Drupalize.Me)
- API Documentation: Taxonomy functions (api.drupal.org)
- API Documentation: Theme functions (api.drupal.org)
