Conditional clauses with Entity field Query

Question

I have a syntax issue on using conditional clauses with EFQ, but the documentation on drupal.org is a bit unclear for me. I have google the whole Internet for this with no results at all. My hook implementation is based on another drupal.stackexchange question

The code works for a single ->fieldCondition but when I try to implement the hook below,

    $query = new EntityFieldQuery();
    $entityFormSubmissionIds = $query->entityCondition('entity_type', 'entityform')
      ->addTag('or')
      ->execute();

/** Implements hook_query_TAG_alter

@param QueryAlterableInterface $query */

function mymodule_query_or_alter(QueryAlterableInterface $query) {
 $or = db_or()->condition('field_a',$term->tid)
       ->condition('field_B', $term->tid);
    ->condition($or)
    ->execute();

Fatal error: Call to undefined method DatabaseCondition::execute()

Answer 1

In the alter hook, you should not be calling execute(). You don't want to run the query at this point, just change it.

function mymodule_query_or_alter(QueryAlterableInterface $query) {
 $or = db_or()->condition('field_a',$term->tid)
       ->condition('field_B', $term->tid);
 $query->condition($or)
}