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feat: exclude archived criteria and groups from competency rollup - #929
An archived CompetencyCriterion or CompetencyCriteriaGroup stops counting toward a learner's status the next time the rollup runs. Every status a learner already holds is kept. The rollup combines only non-archived children, so an archived requirement the learner never met cannot keep a group short of "demonstrated".
The rollup reads a group's children through two queries, _child_groups and _child_criteria. Both require archived=False, so an archived child is invisible to its parent at the point it is fetched. combine_children returns no status when no child has one, and raise_status never lowers or deletes a stored row, so the kept-status and empty-group cases follow from the two filters.
Changes
src/openedx_learning/applets/cbe/rollup.py:
_child_groups and _child_criteria filter archived=False.
_roll_up_groups does not recompute a group that is itself archived. It still adds the group's parent (or, for a root, its competency tag) to the walk. For an archived root it raises the competency's row from the root's stored status, read by the new helper _stored_group_status, so a rollup that stopped between the root write and the competency write is repaired even after the root is archived.
The docstrings of the touched functions and of roll_up_competency_statuses say so.
docs/openedx_learning/decisions/0002-competency-criteria-model.rst: a Decision 6 bullet, a sentence on each archived field, and a changelog entry.
tests/openedx_learning/applets/cbe/test_rollup_api.py and test_tag_rollup.py: see Tests.
Behavior
Filters are applied where children are fetched. Nothing else in the combination logic knows about archived. Leaf evaluation at grade time already skips archived criteria. The rollup's entry query does not, so a rollup call naming an archived criterion's content still recomputes that group from its non-archived children; the scenario "a previously demonstrated requirement changes nothing until the rollup runs" relies on that. The review of feat: roll up learner competency statuses above a graded criterion #870 asked whether the entry query should filter too; it stays unfiltered for that reason.
An archived group is walked through but not recomputed. If the walk (the rollup's level-by-level pass from the graded criteria up to each root group, then up the competency tags) reaches an archived group, it writes no StudentCompetencyCriteriaGroupStatus for it. Its parent is still recomputed from the parent's non-archived children, and a root's competency still goes into the parent-competency walk.
An archived root's stored status still reaches its competency. The root and competency rows are two separate autocommitted writes. If a worker stops between them, a live root is repaired by the next rollup, but an archived root is never recomputed. So at an archived root the walk raises the competency row from the root's stored status instead. One extra query, for archived roots only.
Nothing is lowered or removed. A group with no non-archived children gets no status, which means no write. An existing row is never deleted, and raise_status never writes a lower value. A learner who earned mastery through a requirement that was archived later keeps it.
_own_criteria_statuses is unfiltered, on purpose. A stored status on a parent competency's archived root group still counts toward that competency's own result, so a parent that already reached "demonstrated" through it keeps doing so. The ADR records it, and a test pins it.
Archiving never triggers a rollup. Nothing here calls the rollup from a save or signal. A group status changes when the rollup next runs for a criterion in that group or beneath it, or when the operator recomputation command ([BE] Recompute learner competency statuses on operator command #774, not built yet) runs. Leaf evaluation skips archived criteria, so a grade for an archived requirement writes no leaf row and returns a zero count. The merged edx-platform task (feat: record competency status in the same save as a subsection grade openedx-platform#39179) enqueues the rollup only when that count is non-zero, so the acceptance scenario's "new grade for that requirement" trigger is reachable only through the operator command or through a grade that raises another non-archived criterion in the same batch.
Scope note
Acceptance scenarios 8 and 9 of the ticket ("a sub-competency whose requirements were archived / that never had requirements is still reported for investigation") are not implemented. In the review of #870 the maintainers moved that reporting out of the per-learner rollup to the operator command (#774) or an authoring-time check, and the warning was removed from the rollup there. Ticket 815 still lists both scenarios; the ticket owner has been asked to remove them.
Tests
Sixteen new tests: twelve in test_rollup_api.py and four in test_tag_rollup.py. Nine of the ticket's eleven acceptance scenarios have a test named after the scenario (scenarios 8 and 9 excepted, see Scope note).
Six of the sixteen pass on the rollup without this change: the all-archived, kept-mastery, kept-unmet-status and two parent-competency scenario tests, and test_a_parents_own_archived_root_still_counts_through_its_stored_status. They pin the existing behavior each scenario relies on, and each fails when that behavior is broken. Nine of the other ten fail when the corresponding filter or guard is removed; test_an_archived_root_group_still_starts_the_parent_competency_walk fails when an archived root stops feeding the parent-competency walk.
test_an_archived_root_raises_its_competency_from_the_stored_root_status sets up a stored "demonstrated" root row with no competency row, archives the tree, and expects the rollup to write the competency row.
The empty-collection case ("an AND group whose every child is archived") is the pure function combine_children(op, []), which test_rollup_rules.py::test_combine_children already covers.
Verification
On the branch (one commit on top of upstream main):
pytest tests/openedx_learning/applets/cbe --no-cov: 594 passed on SQLite.
pylint, pycodestyle, isort --check-only on the three changed Python files and pydocstyle on rollup.py: clean. mypy on rollup.py: no new errors (the two it reports are in openedx_content models and fail on main too).
lint-imports: all contracts kept. makemigrations --check --dry-run: no changes.
doc8 on the ADR: 0 errors. sphinx-build: no warnings; the built page contains the new bullet.
Not run after the rebase: the MySQL 8 suite on the Tutor devstack. Before the rebase, the same scenario tests passed on MySQL 8 and a manual check on a Tutor devstack with a scratch database matched every expected value: both archived-requirement cases ended at "demonstrated", kept mastery stayed "demonstrated" with modified unchanged, and the unmet group status stayed "attempted but not demonstrated". There is no manual QA path beyond those checks; the change has no UI or endpoint.
The [BE] Build endpoint for removing a Competency Criteria Group #675 cascade will archive a group's criteria together with the group, but nothing enforces that yet. An archived group whose criteria are still non-archived is not recomputed, and its parent is computed from its other non-archived children. test_the_walk_continues_past_an_archived_group_to_its_parent pins this.
Written with Claude Code (Claude Fable 5.1); the author reviewed and tested the result.
Learner-status calculations now exclude archived criteria and groups while retaining their previously stored statuses.
Groups are calculated from non-archived children. Archiving alone does not recalculate statuses, and a stored status on an archived root can still contribute to its competency and parent competency.
Updated status combinations to handle missing child statuses consistently, including AND and OR requirements.
Documentation
Clarified how archived criteria and groups affect learner-status calculations.
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Filter archived rows out of the two queries that fetch a group's children, so an archived
criterion or criteria group does not count when a learner's group and competency statuses
are combined. A group whose children are all archived has no status to report, so the rollup
writes nothing for it.
An archived group that the walk reaches is passed through, so its parent is still recomputed
from its non-archived children, but its own status is not recomputed. An archived root's
competency row is raised from the root's stored status, so a rollup that stopped between the
root write and the competency write is repaired even after the root is archived.
ADR-0002 Decision 6 records the evaluation rule.
Statuses a learner already holds are never lowered or removed, so mastery earned through a
requirement that was archived later stays earned. A parent competency's own archived root
group counts through its stored status. Archiving does not trigger a rollup; a learner's
statuses reflect it the next time a grade raises a non-archived criterion's status in that
group's subtree, or when an operator recomputes them. Leaf evaluation skips archived criteria
when a grade is recorded. The rollup's entry query does not, so a rollup call naming an
archived criterion's content still recomputes that group from its non-archived children.
Related to openedx#815
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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Nice work! The functionality all checks out and the acceptance criteria are all met.
The tests in test_tag_rollup are not clear to me - can you rewrite them so that a human will understand what is going on in the tests, and can confirm they test the right thing?
The following is not a problem in your code, because it relates to existing code:
For rollup.py, I have a lot of trouble understanding the overall code. It has a very high cognitive complexity. Your changes are pretty clear, but verifying them is hard because of the overall rollup code. I know that the overall rollup code is already merged and not part of your PR. But with all the complicated logic including nested for and if statements it's not easy to understand what the code behavior as a whole is, whether it is correct, and whether it performs well - there are three nested for loops, and reconstructing what collections they loop over and how large those may be is hard.
Maintainability will be an issue, because the complicated logic makes it hard to know where a change needs to go and whether it breaks anything.
Since refactoring is very trivial for AI, I would like to ask you to refactor the whole file for readability:
please use AI to ensure that unit tests are extensive and cover all the important paths and edge cases before starting to refactor.
Ask AI to refactor with a focus on very high maintainability and readability. Apply principles such as low cyclomatic complexity (avoid nested conditionals), low cognitive load for the reader, using the KISS principle to write non-clever dumb code that is easy to read and maintain, decompose into small functions, apply the single responsibility principle and separation of concerns, and apply any other relevant principles for maintainability.
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Question: I'm not sure I understand what this method is supposed to create. It returns some kind of competency criterion object - why is it named "_earnable?"
Each of the two walks in rollup.py is now a short loop over levels that delegates the work
for one level. _roll_up_groups calls _roll_up_group_level, which calls _roll_up_group for
each group, and _roll_up_parent_tags calls _roll_up_parent_level. combine_children keeps its
signature and delegates to _combine_and and _combine_or, one function per operator.
The parent-competency walk no longer queries the parent tags at each level to read back the
primary keys it already holds, so each level of that walk makes one query fewer, and the
parents of a level are processed in ascending id order.
In the rollup tests, the _earnable helper is named _add_requirement, the FAILED alias is
named NOT_DEMONSTRATED, and the tests for archived requirements name each competency and
requirement after its role. A new test covers a parent competency that has no requirement
of its own and no sub-competency with a status, which takes branch coverage of rollup.py
to 100%.
Related to openedx#815
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
@jesperhodge
Thanks for the feedback. The answers to questions which you asked: _earnable gives a competency one root criteria group with one criterion, so that a learner can earn it. In test_a_parent_with_its_own_requirements_is_demonstrated_when_a_sub_competency_is_fully_archived the parent holds "demonstrated" on its own requirement, child 1's only requirement is archived, and child 2's requirement is demonstrated by the grade being rolled up, so the test pins that the parent stays "demonstrated" when the walk passes a fully archived sibling. FAILED is a test alias for MasteryStatus.ATTEMPTED_NOT_DEMONSTRATED, and a group can hold that status.
What I changed:
Renamed _earnable to _add_requirement.
Renamed the FAILED alias to NOT_DEMONSTRATED in the tests.
Rewrote the four tests this PR adds in test_tag_rollup: each has a one-line docstring, and the variables are named after their role (archived_child, graded_requirement).
Added a test for the one uncovered path in rollup.py, which takes its branch coverage from 98% to 100%.
Refactored rollup.py: _roll_up_groups and _roll_up_parent_tags are now short loops that delegate one level to a helper, and combine_children delegates to _combine_and and _combine_or.
Removed the Tag.objects.filter(pk__in=parent_ids) query from the parent-competency walk, because it only read back ids the walk already had.
I also calculate cognitive complexity and cyclomatic complexity metrics for rollup.py and work with claude to optimize it. Before/after table:
I'm approving this. Could you do me a favor and just add the few tests that Claude recommends for a few edge cases?
No need to do another code review after those tests are added. It's just for completeness.
Recommended:
A test for root groups reached at different depths. Competency A has a criterion directly under its root group. Competency B has a criterion two group levels below its root group. Both criteria are on objects graded in the same rollup call, and A and B have different parent competencies. The test asserts that both parents get a status. This protects the set union the refactor added.
A test with two learners. Put two learners with different statuses in the same tree, roll up for one, and assert that the result ignores the other learner's rows. This is the security-relevant gap, because it protects the integrity of each learner's record.
Optional:
A django_assert_num_queries test on a two-level group tree under a parent competency. It would lock in the query count you were concerned about, so an N+1 regression in either walk fails a test.
A test that a nested group in a parent's own tree does not count as the parent's own result. This gap is older than the PR, so it can be a follow-up.
Add four tests for the competency rollup. Root groups reached at different depths of the
group walk each start their own parent-competency walk. Another learner's criterion, root
group, and competency statuses do not count toward the learner being rolled up. A repeated
rollup of nested groups under a parent competency runs a fixed number of queries. A status
on a nested group in a parent competency's own tree does not count as the parent's own
result.
Related to openedx#815
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
No actionable comments were generated in the recent review.
Walkthrough
The rollup updates child-status combination rules, excludes archived criteria and groups from group evaluation, and retains stored statuses. Parent competency rollups combine own criteria results with direct child competency statuses. Tests and the decision record cover these behaviors.
Changes: Archived criteria rollup
Layer / File(s)
Summary
Status combination src/openedx_learning/applets/cbe/rollup.py, tests/openedx_learning/applets/cbe/test_rollup_rules.py, tests/openedx_learning/applets/cbe/test_rollup_api.py
AND and OR groups use updated status rules, including cases with missing child statuses. Tests use NOT_DEMONSTRATED in place of FAILED.
Archived group evaluation and propagation src/openedx_learning/applets/cbe/rollup.py, tests/openedx_learning/applets/cbe/test_rollup_api.py, docs/openedx_learning/decisions/0002-competency-criteria-model.rst
Archived child criteria and groups are excluded from combinations. Archived groups are not recomputed, and a stored archived root status can contribute to its competency. The decision record also states that archiving alone does not trigger recomputation.
Parent results combine the parent’s own root-criteria result with direct child competency statuses. Tests cover archived requirements, nested groups, stored statuses, learner isolation, and repeated rollups.
Competency rollups now skip archived groups and criteria, and a retried rollup raises the competency to match the root group's stored status. No actionable merge-blocking risk remains.
Security architecture risk: Low · up to 5043c
The change preserves learner-specific, raise-only status updates and intentionally retains previously earned mastery. No introduced security vulnerability was established. Residual uncertainty concerns production callers, concurrent archiving, and recovery behavior outside the reviewed library.
Retained concerns
No architecture-level concerns identified.
Security review details
Security Blast Radius
observed — One invocation targets one supplied learner but can reach multiple criteria trees matched by its object IDs and propagate into their ancestor competencies. The entry query intentionally continues matching archived criteria to initiate recomputation; no new caller or learner-selection mechanism is added.
Trust Boundaries and Controls
observed — The two file-specific public-entrypoint signals identify pytest tests. The production function remains an existing library export accepting user_id and object_ids without an in-function authorization check. That caller-responsibility boundary predates this PR; production caller enforcement was not verified.
Resilience and Maintainability Implications
observed — Existing per-learner/node uniqueness constraints and a conditional status-increase UPDATE support repeated and competing status writes without lowering stored mastery. These controls do not provide a consistent snapshot across concurrent archive edits or guarantee that an interrupted task is retried.
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The title "feat: exclude archived criteria and groups from competency rollup" matches the main change. The objectives and file summaries show that rollup queries now exclude archived child groups and criteria. The title is specific and concise, and it names the primary behavior change.
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Review comments at
@docs/openedx_learning/decisions/0002-competency-criteria-model.rst:
- Line 90: Update the archived-group status rule in Decision 0002 to distinguish
archived child groups from archived roots: exclude archived child groups from
group combinations, but allow an archived root’s stored status to contribute to
its competency and parent competency as specified in Decision 6.
Review comments at @src/openedx_learning/applets/cbe/rollup.py:
- Around line 182-183: Update the rollup flow around _recompute_group so a
root’s competency level is derived from its stored status after recomputation,
not the recomputed return value. For every root, read the status with
_stored_group_status and pass any non-None result to _raise_competency_status;
preserve the existing behavior for non-root groups.
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Major · Data Integrity & Integration · Quick win
Raise the competency from the root's stored status, not the recomputed value.
For a non-archived root, the competency takes the recomputed value. raise_status keeps the stored root status at its higher value. Each write commits separately, so an interrupted rollup can store DEMONSTRATED on the root without writing the competency. If the demonstrated child is then archived, a retry recomputes a lower value or None. The competency stays unset or PARTIALLY_ATTEMPTED while the root keeps DEMONSTRATED.
Read the root's stored status after recomputation, as the archived-root branch does.
Suggested fix
--- "a/src/openedx_learning/applets/cbe/rollup.py"+++ "b/src/openedx_learning/applets/cbe/rollup.py"@@ -172,15 +172,12 @@
An archived group is not recomputed, and an archived root passes on the status it already holds.
"""
- is_root = group.parent_id is None- if not group.archived:- status = _recompute_group(user_id, group, child_statuses, now)- elif is_root:- status = _stored_group_status(user_id, group.pk)- else:- status = None- if is_root and status is not None:- _raise_competency_status(user_id, group.tag_id, _competency_level(status), now)+ if not group.archived:+ _recompute_group(user_id, group, child_statuses, now)+ if group.parent_id is None:+ status = _stored_group_status(user_id, group.pk)+ if status is not None:+ _raise_competency_status(user_id, group.tag_id, _competency_level(status), now)
def _roll_up_group_level(user_id: int, group_ids: set[int], now: datetime) -> list[CompetencyCriteriaGroup]:
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Review comment at @src/openedx_learning/applets/cbe/rollup.py around lines 182 - 183:
Update the rollup flow around _recompute_group so a root’s competency level is derived from its stored status after recomputation, not the recomputed return value. For every root, read the status with _stored_group_status and pass any non-None result to _raise_competency_status; preserve the existing behavior for non-root groups.
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A rollup raises a competency's status from the status stored for its root group, whether or
not the root is archived. A stored root status can be higher than the value recomputed from
the root's children: a rollup can stop between the root write and the competency write, and
the child that earned the root's status can be archived before the retry. Reading the stored
status makes the retry bring the competency up to the root's status. The read is one more
query per root group in a rollup.
ADR-0002 states the rule in Decision 6, and the description of the group's archived column
names the archived root as the case where an archived group's stored status still counts.
Related to openedx#815
Co-Authored-By: Claude Fable 5.2 <noreply@anthropic.com>
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Description
An archived
CompetencyCriterionorCompetencyCriteriaGroupstops counting toward a learner's status the next time the rollup runs. Every status a learner already holds is kept. The rollup combines only non-archived children, so an archived requirement the learner never met cannot keep a group short of "demonstrated".The rollup reads a group's children through two queries,
_child_groupsand_child_criteria. Both requirearchived=False, so an archived child is invisible to its parent at the point it is fetched.combine_childrenreturns no status when no child has one, andraise_statusnever lowers or deletes a stored row, so the kept-status and empty-group cases follow from the two filters.Changes
src/openedx_learning/applets/cbe/rollup.py:_child_groupsand_child_criteriafilterarchived=False._roll_up_groupsdoes not recompute a group that is itself archived. It still adds the group's parent (or, for a root, its competency tag) to the walk. For an archived root it raises the competency's row from the root's stored status, read by the new helper_stored_group_status, so a rollup that stopped between the root write and the competency write is repaired even after the root is archived.roll_up_competency_statusessay so.docs/openedx_learning/decisions/0002-competency-criteria-model.rst: a Decision 6 bullet, a sentence on eacharchivedfield, and a changelog entry.tests/openedx_learning/applets/cbe/test_rollup_api.pyandtest_tag_rollup.py: see Tests.Behavior
archived. Leaf evaluation at grade time already skips archived criteria. The rollup's entry query does not, so a rollup call naming an archived criterion's content still recomputes that group from its non-archived children; the scenario "a previously demonstrated requirement changes nothing until the rollup runs" relies on that. The review of feat: roll up learner competency statuses above a graded criterion #870 asked whether the entry query should filter too; it stays unfiltered for that reason.StudentCompetencyCriteriaGroupStatusfor it. Its parent is still recomputed from the parent's non-archived children, and a root's competency still goes into the parent-competency walk.raise_statusnever writes a lower value. A learner who earned mastery through a requirement that was archived later keeps it._own_criteria_statusesis unfiltered, on purpose. A stored status on a parent competency's archived root group still counts toward that competency's own result, so a parent that already reached "demonstrated" through it keeps doing so. The ADR records it, and a test pins it.Scope note
Acceptance scenarios 8 and 9 of the ticket ("a sub-competency whose requirements were archived / that never had requirements is still reported for investigation") are not implemented. In the review of #870 the maintainers moved that reporting out of the per-learner rollup to the operator command (#774) or an authoring-time check, and the warning was removed from the rollup there. Ticket 815 still lists both scenarios; the ticket owner has been asked to remove them.
Tests
Sixteen new tests: twelve in
test_rollup_api.pyand four intest_tag_rollup.py. Nine of the ticket's eleven acceptance scenarios have a test named after the scenario (scenarios 8 and 9 excepted, see Scope note).Six of the sixteen pass on the rollup without this change: the all-archived, kept-mastery, kept-unmet-status and two parent-competency scenario tests, and
test_a_parents_own_archived_root_still_counts_through_its_stored_status. They pin the existing behavior each scenario relies on, and each fails when that behavior is broken. Nine of the other ten fail when the corresponding filter or guard is removed;test_an_archived_root_group_still_starts_the_parent_competency_walkfails when an archived root stops feeding the parent-competency walk.test_an_archived_root_raises_its_competency_from_the_stored_root_statussets up a stored "demonstrated" root row with no competency row, archives the tree, and expects the rollup to write the competency row.The empty-collection case ("an AND group whose every child is archived") is the pure function
combine_children(op, []), whichtest_rollup_rules.py::test_combine_childrenalready covers.Verification
On the branch (one commit on top of upstream
main):pytest tests/openedx_learning/applets/cbe --no-cov: 594 passed on SQLite.pylint,pycodestyle,isort --check-onlyon the three changed Python files andpydocstyleonrollup.py: clean.mypyonrollup.py: no new errors (the two it reports are inopenedx_contentmodels and fail onmaintoo).lint-imports: all contracts kept.makemigrations --check --dry-run: no changes.doc8on the ADR: 0 errors.sphinx-build: no warnings; the built page contains the new bullet.Not run after the rebase: the MySQL 8 suite on the Tutor devstack. Before the rebase, the same scenario tests passed on MySQL 8 and a manual check on a Tutor devstack with a scratch database matched every expected value: both archived-requirement cases ended at "demonstrated", kept mastery stayed "demonstrated" with
modifiedunchanged, and the unmet group status stayed "attempted but not demonstrated". There is no manual QA path beyond those checks; the change has no UI or endpoint.Notes for reviewers
maintoday. Nothing in openedx-core setsarchivedon a group or criterion yet. This change, and an edx-platform pin to a release containing it, must land before the archive actions ([BE] Delete Competency Criterion #674, [BE] Build endpoint for removing a Competency Criteria Group #675) reach production. The ticket's "ship before [BE] Exclude archived competency criteria and criteria groups from evaluation when a grade is recorded #816" ordering is already crossed; the ticket owner has been asked what is left in 816.test_the_walk_continues_past_an_archived_group_to_its_parentpins this.Written with Claude Code (Claude Fable 5.1); the author reviewed and tested the result.
Related to #815
🤖 Generated with Claude Code
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