function truefalse_update_7500 in Quiz 7.5

Normalize data storage.

File

question_types/truefalse/truefalse.install, line 87

Truefalse question install file.

Code

function truefalse_update_7500() {
  db_drop_primary_key('quiz_truefalse_user_answers');
  db_add_field('quiz_truefalse_user_answers', 'answer_id', array(
    'type' => 'serial',
    'not null' => TRUE,
  ), array(
    'primary key' => array(
      'answer_id',
    ),
  ));
  db_add_field('quiz_truefalse_user_answers', 'result_answer_id', array(
    'type' => 'int',
    'unsigned' => TRUE,
    'not null' => FALSE,
  ));
  db_query("UPDATE {quiz_truefalse_user_answers} qtua\n    INNER JOIN {quiz_node_results_answers} qnra ON (qtua.question_nid = qnra.question_nid\n    AND qtua.question_vid = qnra.question_vid\n    AND qtua.result_id = qnra.result_id)\n    SET qtua.result_answer_id = qnra.result_answer_id");
  db_drop_field('quiz_truefalse_user_answers', 'result_id');
  db_drop_field('quiz_truefalse_user_answers', 'question_nid');
  db_drop_field('quiz_truefalse_user_answers', 'question_vid');
  db_add_unique_key('quiz_truefalse_user_answers', 'result_answer_id', array(
    'result_answer_id',
  ));
}