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<?php // $Id: upgrade.php,v 1.1 2008/07/24 01:48:12 arborrow Exp $
// This file keeps track of upgrades to
// the algebra qtype plugin
//
// Sometimes, changes between versions involve
// alterations to database structures and other
// major things that may break installations.
//
// The upgrade function in this file will attempt
// to perform all the necessary actions to upgrade
// your older installtion to the current version.
//
// If there's something it cannot do itself, it
// will tell you what you need to do.
//
// The commands in here will all be database-neutral,
// using the functions defined in lib/ddllib.php
function xmldb_qtype_algebra_upgrade($oldversion=0) {
global $CFG, $THEME, $DB;
$dbman = $DB->get_manager();
/// And upgrade begins here. For each one, you'll need one
/// block of code similar to the next one. Please, delete
/// this comment lines once this file start handling proper
/// upgrade code.
// Add the field to store the string which is placed in front of the answer
// box when the question is displayed
if ($oldversion < 2008061500) {
$table = new xmldb_table('question_algebra');
$field = new xmldb_field('answerprefix', XMLDB_TYPE_TEXT, 'small', null, XMLDB_NOTNULL, null, '', 'allowedfuncs');
if (!$dbman->field_exists($table, $field)) {
$dbman->add_field($table, $field);
}
upgrade_plugin_savepoint(true, 2008061500, 'qtype', 'algebra');
}
// Drop the answers and variables fields wich are totaly redundants
if ($oldversion < 2011072800) {
$table = new xmldb_table('question_algebra');
$field = new xmldb_field('answers');
if ($dbman->field_exists($table, $field)) {
$dbman->drop_field($table, $field);
}
$field = new xmldb_field('variables');
if ($dbman->field_exists($table, $field)) {
$dbman->drop_field($table, $field);
}
upgrade_plugin_savepoint(true, 2011072800, 'qtype', 'algebra');
}
return true;
}
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