Passing Section and SIS ID information from Canvas to WeBWork

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Passing Section and SIS ID information from Canvas to WeBWork

We have set up the WeBWork LTI in Canvas and it's working like we want it to so far, but there's some tweak that we need involving custom LTI paramenters

Here's what's in WeBWork:


When auto-provisioning a student we want to additionally pull the users SIS ID and the SIS Section ID, which I think means adding custom fields in the app configuration:


When I add, for example:

Student ID= lis_person_sourcedid

it does not get the user's ID, it just adds "lis_person_sourcedid"  literally to the Users List record when we want the student ID number for the user.  

Our WeBWork server is self-hosted, so this is our first time working on "this side" of the LTI, so hopefully some of the more experience admins can help us to get this information pulled from Canvas to WeBWork.



1 Solution
Community Champion


The correct format is documented on the LTI Variable Substitutions page. It also contains a list of the variables you can use.

You need to include a $ in front of the variable name and use the right name. Note that if you do include spaces, it will change them to underscores. It also prefixes your request with custom_ and forces it to lowercase.

Student ID=$lis_person_sourcedid

comes through as


because lis_person_sourcedid is not a valid variable substitution.

The right one to use is Person.sourcedId

Student ID=$Person.sourcedId

comes through as


Another way to get this particular parameter through is to change the privacy to public and then it will automatically include lis_person_sourcedid. Going public may not be feasible from a privacy perspective, though, so that's where variable substitutions come in.

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