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1. Autosave works in some ways just like a normal save. We ultimately call $behaviour->process_save() to do the work, and create a new step to hold the data. 2. However, we come in through a completely different route through the API, starting with separate auto-save methods. This keeps the auto-save changes mostly separate, and so reduced the chance of breaking existing working code. 3. When the time comes to store the auto-save step in the database, we save it using a negative sequence number. This is a clever trick that not only distinguises these steps, but also avoids unique key errors when an auto-save and a real action happen simultaneously. (There are unit tests for these tricky edge cases.) 4. When we load the data back from the database, most of the time the auto-save steps are loaded back as if they were a real save, and so the auto-saved data is used when the question is then rendered. 5. However, before we process another action, we remove the auto-saved step, so it does not appear in the final history.
88 lines
3.2 KiB
PHP
88 lines
3.2 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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defined('MOODLE_INTERNAL') || die();
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/**
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* Quiz module test data generator class
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*
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* @package moodlecore
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* @subpackage question
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* @copyright 2013 The Open University
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class core_question_generator extends component_generator_base {
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/**
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* @var number of created instances
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*/
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protected $categorycount = 0;
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public function reset() {
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$this->categorycount = 0;
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}
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/**
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* Create a new question category.
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* @param array|stdClass $record
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* @return stdClass question_categories record.
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*/
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public function create_question_category($record = null) {
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global $DB;
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$this->categorycount++;
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$defaults = array(
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'name' => 'Test question category ' . $this->categorycount,
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'contextid' => context_system::instance()->id,
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'info' => '',
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'infoformat' => FORMAT_HTML,
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'stamp' => '',
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'parent' => 0,
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'sortorder' => 999,
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);
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$record = $this->datagenerator->combine_defaults_and_record($defaults, $record);
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$record['id'] = $DB->insert_record('question_categories', $record);
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return (object) $record;
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}
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/**
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* Create a new question. The question is initialised using one of the
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* examples from the appropriate {@link question_test_helper} subclass.
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* Then, any files you want to change from the value in the base example you
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* can override using $overrides.
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* @param string $qtype the question type to create an example of.
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* @param string $which as for the corresponding argument of
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* {@link question_test_helper::get_question_form_data}. null for the default one.
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* @param array|stdClass $overrides any fields that should be different from the base example.
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*/
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public function create_question($qtype, $which = null, $overrides = null) {
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global $CFG;
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require_once($CFG->dirroot . '/question/engine/tests/helpers.php');
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$fromform = test_question_maker::get_question_form_data($qtype, $which);
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$fromform = (object) $this->datagenerator->combine_defaults_and_record(
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(array) $fromform, $overrides);
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$question = new stdClass();
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$question->category = $fromform->category;
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$question->qtype = $qtype;
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$question->createdby = 0;
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return question_bank::get_qtype($qtype)->save_question($question, $fromform);
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}
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}
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