Ideally, extending the VertexAISearch plugin should be supported and be easy.
There is a preprocess function used to display a message on the search page if no keywords are specified or if no results are returned from a search. This preprocess function does not execute for derived classes. This preprocess function is specific to the VertexAISearch plugin, but should also be executed by classes that extend the VertexAISearch class.
In the vertex_ai_search.module file, the following hook is implemented:
/**
* Implements hook_preprocess_item_list__search_results__vertex_ai_search().
*
* Overwrite the message for when there are no search results.
*/
function vertex_ai_search_preprocess_item_list__search_results__vertex_ai_search(&$variables) {
This hook is specific to the VertexAISearch plugin.
Also in the vertex_ai_search.module is this helper function:
function _vertex_ai_search_get_configuration(array &$variables) {
$entity = \Drupal::service('current_route_match')->getParameter('entity');
$configuration = [];
if ($entity instanceof SearchPage) {
$plugin = $entity->getPlugin()->getPluginId();
if ($plugin == 'vertex_ai_search') {
$configuration = $entity->getPlugin()->getConfiguration();
}
}
return $configuration;
}
...this method includes logic that is specific to the 'vertex_ai_search' plugin.
Two things need to be modified:
1. Instead of implementing the 'vertex_ai_search_preprocess_item_list__search_results__vertex_ai_search' hook, implement the 'vertex_ai_search_preprocess_item_list__search_results' hook. This is not specific to a plugin.
2. Modify the '_vertex_ai_search_get_configuration' helper function so that it does not depend on the plugin being of type 'vertex_ai_search'. Instead, try checking to see if the plugin is an instance of the 'VertexAISearch' class.
Active
1.2
Code
Issue #3483499: preprocess function unavailable for derived classes.
Automatically closed - issue fixed for 2 weeks with no activity.