Question about state management

[isConic]

I've been looking into the code for both this and the underlying PYLTI Library.

I've run into issues in understanding how state is managed.

When I open the Edx platform. It makes a post request with some information about OAuth and some stuff about LTI to /index .
The backend, upon verifying the OAuth stuff, returns a web-page tailored to my student that is displayed on the Edx platform.

My question is... Let's say 4 users are using this LTI tool simultaneously. When they submit their answers, where does /grade get the information that tells me which student submitted their solution? Is LTI state passed to the add form, then submitted back to the /grade? Or does the pyLTI flask component just magically store user state and disambiguates one user's request from anothers?

[isConic]

I guess an supporting question might be... does this example actually interface with edx to report grading?

[pdpinch]

I don't think I can answer your question in detail, but we have had folks use this library to develop apps that track learner state and push grades back into edX (and MITx).

It's possible that the example app doesn't demonstrate that type of feature.