moodle/mod/lti/upgrade.txt

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This files describes API changes in the lti code.
=== 3.1 ===
* When requesting a grade from the outcome service, and empty grade will now be returned as
an empty grade in accordance with the spec. Previously a grade of 0 would be returned.
=== 3.0 ===
* Function lti_view (locallib.php) was renamed to lti_launch_tool.
A new and different lti_view function was created in the module lib.php containing the code for launching events and update the completion status for the module.
=== 2.8 ===
* Support for LTI 2 added, including extensible services implemented as ltiservice plugins.
* Function sendOAuthBodyPOST removed from OAuthBody.php because it was not being used.
* The field 'grade' in the table {lti} is now an integer rather than a numeric to bring it
in line with the 'grade' field in other activities.
=== 2.7 ===
* mod_lti\event\unknown_service_api_called now has less data stored in 'other'
but everything is still available for event observers via method get_message_data()