function _quiz_get_random_taxonomy_question_ids in Quiz 8.4

Same name and namespace in other branches

1. 6.6 quiz.module \_quiz_get_random_taxonomy_question_ids()
2. 6.2 quiz.module \_quiz_get_random_taxonomy_question_ids()
3. 6.3 quiz.module \_quiz_get_random_taxonomy_question_ids()
4. 6.4 quiz.module \_quiz_get_random_taxonomy_question_ids()
5. 6.5 quiz.module \_quiz_get_random_taxonomy_question_ids()
6. 7.6 quiz.module \_quiz_get_random_taxonomy_question_ids()
7. 7 quiz.module \_quiz_get_random_taxonomy_question_ids()
8. 7.4 quiz.module \_quiz_get_random_taxonomy_question_ids()

Given a term ID, get all of the question nid/vids that have that ID.

Parameters

$tid: Integer term ID.

Return value

Array of nid/vid combos, like array(array('nid'=>1, 'vid'=>2)).

2 calls to _quiz_get_random_taxonomy_question_ids()

quiz_questions_form_submit in ./quiz.admin.inc

Submit function for quiz_questions.

_quiz_get_random_questions in ./quiz.module

Get an array list of random questions for a quiz.

File

./quiz.module, line 3113

Quiz Module

Code

function _quiz_get_random_taxonomy_question_ids($tid, $num_random) {
  if ($tid == 0) {
    return array();
  }

  // Select random questions by taxonomy.
  $term = entity_load('taxonomy_term', $tid);
  $tree = taxonomy_get_tree($term->vid, $term->tid);

  // Flatten the taxonomy tree, and just keep term id's.
  $term_ids[] = $term->tid;
  if (is_array($tree)) {
    foreach ($tree as $term) {
      $term_ids[] = $term->tid;
    }
  }
  $term_ids = implode(',', $term_ids);

  // Get all published questions with one of the allowed term ids.
  // TODO Please convert this statement to the D7 database API syntax.
  $result = db_query("SELECT n.nid, n.vid\n    FROM {node} n\n    INNER JOIN {taxonomy_index} tn USING (nid)\n    WHERE n.status = 1 AND tn.tid IN ({$term_ids})\n    AND n.type IN ('" . implode("','", array_keys(_quiz_get_question_types())) . "') ORDER BY RAND()");
  $questions = array();
  foreach ($result as $question_node) {
    $question_node['random'] = TRUE;
    $questions[] = $question_node;
  }
  return $questions;
}