/**
* Update a question_attempts row to refect any changes in a question_attempt
* (but not any of its steps).
* @param question_attempt $qa the question attempt that has changed.
*/
public function update_question_attempt(question_attempt $qa)
{
$record = new stdClass();
$record->id = $qa->get_database_id();
$record->maxmark = $qa->get_max_mark();
$record->minfraction = $qa->get_min_fraction();
$record->maxfraction = $qa->get_max_fraction();
$record->flagged = $qa->is_flagged();
$record->questionsummary = $qa->get_question_summary();
$record->rightanswer = $qa->get_right_answer_summary();
$record->responsesummary = $qa->get_response_summary();
$record->timemodified = time();
$this->db->update_record('question_attempts', $record);
}