This is a mini how-to oriented to new NWiki developers who usually use incorrect SQL queries to access to wiki pages.
wiki_pages table has one primary key: id. If you have it, you can invoke dmllib.php functions such get_record
$page = get_record('wiki_pages', 'id', $pageid);
Several problems appear when you don’t have this id. Then you must use wiki API. There are great magic functions that recover wiki pages data from database.
If you are developing new features you must take into account that wiki_pages table has an enormous unique key:
- pagename
- version
- dfwiki
- groupid
- userid
- ownerid
In a normal situation you will have a pagename and a wiki id or a coursemodule id. Then, you must get coursemodule description using Moodle API.
- get_coursemodule_from_id( $modulename, $cmid, $courseid);
- get_coursemodule_from_instance($modulename, $instance, $courseid=0) ;
Using these functions you will be able to look up for the groupmode of this activity instance. At this point you will know the groupmode and stundentmode combination that is set up.
Calling get_record/s with the correct fields will return the desired wiki/s.
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