LTI1.3 Assignment and grade

[dtiwari_1991]

I have my external tool which working fine with Canvas. All the auth endpoints are working as expected. As an instructor, I am able to create line items from my tool which gets displayed as an assignment in the platform.

Below sample JSON of my line item.

const newLineItemData = {

      scoreMaximum: lineItemData.scoreMaximum,

      label: lineItemData.label,

      resourceId: resourceId,

      tag: lineItemData.tag,

      "https://canvas.instructure.com/lti/submission_type": {

        type: "external_tool",

        external_tool_url:

          "my tool url"

      }

    };

When a student goes to his assignment section on the platform, he can see all the assignments that the instructor created. Now, when students click on the specific assignment, my tools URL gets displayed in the frame however the problem that I am facing is, the launch that happens is a basic LTI launch request. I was expecting that the oidc launch flow will start so that I can get the id_token (which has all the scope and end points) and submit the grade for the logged-in students.

so my question is:

1) is this the right behaviour (i.e. basic LTI launch)?

2) why it's not launching the oidc launch flow?

[pcarver-wozu1]

I'm wondering how your create works? I just so happen to be implementing our tool on Canvas, a tool that already works on several other platforms. But the create line item is failing. We've tried POSTing with basically the same payload you have, but the result comes back as an error of"Not found". Whatever that means...we know the course id is correct since we get it from the LTI context url.

We POST to a URL like this in the test environment:
https://{ourcompany}.test.instructure.com/api/lti/courses/{courseId}/line_items

The media type posted is the LTI standard:
application/vnd.ims.lis.v2.lineitem+json

For the external_tool_url, we are just using the same URL that launches our tool. Granted, we're not getting past the create yet so we don't see the workflow you describe.

[calvin1]

I'm seeing the same behavior. Is there a way to explicitly force a created LineItem to use LTI 1.3?