Migrating to 2.0 checklist

Moodle 2.0

These are things that OU developers have found so far to check/do in code we're migrating from Moodle 1.9 to 2.0. All information on the detail of this checklist can be found elsewhere in Moodle Docs, and particularly from the Migrating_contrib_code_to_2.0

Not all these things are essential for a rush job, but if you did all of them, then that'd be great. We should really mark each one with a priority of some sort!

Please add/edit this list!

Database

Leave empty db/update.php file
New $DB global objects with functions replace old db functions
$DB parameters swapped to ?
Add and strip slashes no longer required
Remove use of ENUM and ENUMVALUES in install.xml file
Remove STATEMENTS section in install.xml file, use db/install.php or db/log.php instead.
check use of sql_substr()
Get_records() etc now always returning arrays, empty array in case of no records found.
Db functions throw errors not return false on error
DB functions offer strictness parameters e.g MUST_EXIST
Update version.php numbers (esp required)
In version.php add $module->requires = 2010080300; // Requires this Moodle version

Page display

New $OUTPUT header and footer functions
Navigation links need to use $PAGE->navbar
Make sure that you instantiate the moodle form before any call to $OUTPUT->header()
Create a renderer
Change the way image urls are displayed (not $CFG->pixpath any more)
CSS changes
- Change styles.php to styles.css
- Change page id to new structure e.g. course-format-studyplan to page-course-view-studyplan

Roles and Permissions:

array name to $capabilities in access.php
Remove references to admin in access.php
Rename legacy to archetypes in access.php
Add manager archetype in access.php
Ensure require_login as well as require_capability checks
isguest() is depreicated, use !isloggedin() || isguestuser() instead

Language strings

Rename language folder
Change $a to {$a} in language files
Change popup help files to _help lang strings and shorten
Add $string[‘pluginname’] to lang file
Add $string[‘pluginadministration’] to lang file

Forms

Param_clean parameter type removed
type required parameter for optional_and required_param
Replace file form elements with new filepicker
Replace htmleditor with editor form field type
Change setHelpButton to addHelpButton. (You need to change the arguments, but the new ones are simpler.)

General

Swap config_ files to edit and settings php files
Fix whitespace & coding style
rs_fetch_next_record($rs) is deprecated, in favour of the simple foreach($rs as $var). Calls to rs_close() must be replaced by $rs->close();
Check functions deprecated list: Deprecated_functions_in_2.0
Use print_error() or throw new moodle_exception not error()
Replace all url strings e.g. in redirect() calls with moodle_url instances
Move install/uninstall functions from lib to db/install.php, lib/uninstall.php
Move images into pix folder (especially icon.gif), get path by calling $OUTPUT->pix_url('icon', 'local_whatever');
Add 'supports' function in lib (modname_supports()) for modules (and blocks?).
New Backup and Restore process - Backup_2.0_for_developers, Restore_2.0_for_developers.
Add db/log.php file if you have log calls (see any of the core modules for examples).

Documentation