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function multichoice_uninstall in Quiz 5.2

Same name and namespace in other branches
  1. 8.6 question_types/quiz_multichoice/quiz_multichoice.install \multichoice_uninstall()
  2. 8.4 question_types/multichoice/multichoice.install \multichoice_uninstall()
  3. 8.5 question_types/quiz_multichoice/quiz_multichoice.install \multichoice_uninstall()
  4. 6.6 question_types/multichoice/multichoice.install \multichoice_uninstall()
  5. 6.2 multichoice.install \multichoice_uninstall()
  6. 6.3 question_types/multichoice/multichoice.install \multichoice_uninstall()
  7. 6.4 question_types/multichoice/multichoice.install \multichoice_uninstall()
  8. 6.5 question_types/multichoice/multichoice.install \multichoice_uninstall()
  9. 7.6 question_types/multichoice/multichoice.install \multichoice_uninstall()
  10. 7 question_types/multichoice/multichoice.install \multichoice_uninstall()
  11. 7.4 question_types/multichoice/multichoice.install \multichoice_uninstall()
  12. 7.5 question_types/multichoice/multichoice.install \multichoice_uninstall()

Implementation of hook_uninstall()

File

./multichoice.install, line 79

Code

function multichoice_uninstall() {

  // Remove the two tables we created for this module.
  if (db_table_exists('quiz_multichoice_answers')) {
    db_query('DROP TABLE {quiz_multichoice_answers}');
  }
  if (db_table_exists('quiz_multichoice_user_answers')) {
    db_query('DROP TABLE {quiz_multichoice_user_answers}');
  }

  // Erase any saved variable settings from the database.
  db_query("DELETE FROM {variable} WHERE name LIKE '%s%%'", 'multichoice_');

  // Delete from nodes and node_revisions.
  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      db_query('DELETE FROM {node}, {node_revisions}, {quiz_node_question_properties} USING node LEFT JOIN {node_revisions} USING (nid) LEFT JOIN {quiz_node_question_properties} USING (nid) WHERE type IN ("multichoice")');
      break;
    case 'pgsql':
      db_query("DELETE FROM {quiz_node_question_properties} WHERE nid IN (SELECT nid FROM {node} WHERE type IN ('multichoice'))");
      db_query("DELETE FROM {node_revisions} WHERE nid IN (SELECT nid FROM {node} WHERE type IN ('multichoice'))");
      db_query("DELETE FROM {node} WHERE type IN ('multichoice')");
      break;
  }

  // Truncate the cache so users don't run into any unexpected errors.
  cache_clear_all('variables', 'cache');

  // Inform the user that uninstall was sucessful.
  drupal_set_message(t("The Multichoice module, it's settings, and all saved questions were successfully removed."));
}