In a MOOC-Grader personalized exercise, the teacher should be able to view and test all exercise instances via the A+ frontend

[markkuriekkinen]

Currently in personalized exercises set up in the MOOC-Grader, the teacher sees only one exercise instance in A+ just like students. The teacher needs a way to view and test all exercise instances.

The exercise instance selection is deterministic in the MOOC-Grader:
https://github.com/apluslms/mooc-grader/blob/c697bee96202999725bd08ce0b596012a1a2e674/util/personalized.py#L62-L86
Should there be extra parameters for testing specific exercises or should A+ manipulate the existing parameters that are sent to the grader when the teacher is testing the exercise?

A+ sets the parameters for the grader protocol mainly here:

a-plus/exercise/exercise_models.py

Lines 951 to 982 in a932c51

	def get_load_url( # pylint: disable=too-many-arguments
	self,
	language: str,
	request: HttpRequest,
	students: List[UserProfile],
	url_name: str = "exercise",
	ordinal: Optional[int] = None,
	) -> str:
	if self.id:
	if request.user.is_authenticated:
	user = request.user
	if ordinal is None:
	submission_count = self.get_submissions_for_student(
	user.userprofile, exclude_errors=True
	).count()
	ordinal = submission_count + 1
	else:
	user = None
	ordinal = 1
	# Make grader async URL for the currently authenticated user.
	# The async handler will handle group selection at submission time.
	submission_url = update_url_params(
	api_reverse("exercise-grader", kwargs={
	'exercise_id': self.id
	}),
	get_graderauth_exercise_params(self, user),
	)
	return self._build_service_url(
	language, students,
	ordinal, url_name, submission_url, lti_launch_id=request.session.get("lti-launch-id")
	)
	return super().get_load_url(language, request, students, url_name, ordinal)

a-plus/exercise/exercise_models.py

Lines 1019 to 1035 in a932c51

	def _build_service_url(self, language, students, ordinal_number, url_name, submission_url, lti_launch_id=None):
	"""
	Generates complete URL with added parameters to the exercise service.
	"""
	uid_str = '-'.join(sorted(str(profile.user.id) for profile in students)) if students else ''
	params = {
	"max_points": self.max_points,
	"max_submissions": self.max_submissions,
	"submission_url": build_aplus_url(submission_url),
	"post_url": build_aplus_url(str(self.get_url(url_name)), user_url=True),
	"uid": uid_str,
	"ordinal_number": ordinal_number,
	"lang": language,
	}
	if lti_launch_id:
	params["lti_launch_id"] = lti_launch_id
	return update_url_params(self.get_service_url(language), params)