Return only the requested project's detections - #1390
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The detections list endpoint validated its required project_id parameter but never applied it: the response mixed in rows from every non-draft project and reported a count over the whole table, so the full-table pagination COUNT the requirement exists to prevent (see "Require project_id on list endpoints for the four hot tables", #1250) still ran for every request that supplied the parameter. Scope the queryset by the requested project in get_queryset(), the same shape ClassificationViewSet and OccurrenceViewSet already use, and drop the redundant validation call in list(): get_queryset() resolves the project (raising the missing-project_id 400 on list requests) before pagination issues its COUNT. Add a scoping-invariant test across the four project-required list endpoints asserting that response rows and counts stay within the requested project, resolving each model's path to Project generically via get_project_accessor(). The test fails against the previous detections behaviour and passes with the fix. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01HcXFHJRXMrsHPX7xz9ZifF
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📝 WalkthroughWalkthroughThe change scopes detection querysets to the active project and removes redundant project resolution from ChangesProject scoping
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: 🔵 Low · up to The change scopes detection lists to the requested project, but the regression test may miss omitted in-project rows because it checks only a subset. The PR is mergeable with explicit follow-up to assert the complete expected ID set. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
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Inline comments:
In `@ami/main/tests.py`:
- Line 2224: Update the assertion in the relevant test method to require exact
equality between returned_ids and expected_ids, replacing the subset-only
assertLessEqual check while preserving the existing path context.
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Pull request overview
This PR fixes a correctness/performance issue in the detections list API by actually applying the required project_id to scope the queryset, aligning behavior with the other “hot table” endpoints and preventing full-table pagination counts.
Changes:
- Scope
DetectionViewSet.get_queryset()by the resolved active project (source_image__project), removing the previous no-op project resolution inlist(). - Add a regression test that verifies project scoping (returned IDs and
count) across the four project-required list endpoints.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.
| File | Description |
|---|---|
ami/main/api/views.py |
Filter detections queryset by the active project so list results and pagination count are correctly scoped. |
ami/main/tests.py |
Add a generic project-scoping test covering the four project-required list endpoints. |
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| response = self.client.get(f"{path}?project_id={project.pk}&limit=200") | ||
| self.assertEqual(response.status_code, status.HTTP_200_OK, path) | ||
| data = response.json() | ||
|
|
||
| returned_ids = {result["id"] for result in data["results"]} | ||
| leaked_ids = returned_ids & other_ids | ||
| self.assertFalse( | ||
| leaked_ids, | ||
| f"{path} returned rows from other projects: {sorted(leaked_ids)}", | ||
| ) | ||
| self.assertLessEqual(returned_ids, expected_ids, path) | ||
| self.assertEqual( | ||
| data["count"], | ||
| len(expected_ids), | ||
| f"{path} count spans more than the requested project", | ||
| ) |
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Claude says: Fair point, and it was the one behaviour change in the description with nothing holding it in place. Added test_detail_route_rejects_a_project_it_does_not_belong_to in 9b92652.
It asserts both directions: the detail route returns 200 for the object's own project and 404 when named with a different one. The reason it deserved pinning is that the 404 is a consequence of where the filter lives — get_queryset() is read by every action — rather than anything the detail route does itself, so a later refactor that scoped only the list action would drop it silently.
Verified by reverting the get_queryset() hunk and re-running: without the fix it fails with AssertionError: 200 != 404.
The scoping assertion compared the returned ids as a subset of the expected ones, which catches rows leaking in from other projects but not rows belonging to the project going missing. The fixtures are an order of magnitude smaller than the requested page, so the response must contain every expected row; compare the sets exactly. Also cover the detail route. Scoping lives in get_queryset(), which every action reads, so naming a project the object does not belong to returns 404. That follows from where the filter sits rather than from anything the detail route does itself, so a later change that scoped only the list action would drop it silently.
Summary
The detections list endpoint requires a
project_idand then ignores it. A request for one project's detections comes back with rows belonging to other projects and acountcovering the whole table, so callers see data that isn't theirs and a total that means nothing to them. It is also slow, because the pagination COUNT runs across every row rather than the requested project's.This is a correctness bug rather than an access-control one: the visibility filter still hides draft projects, so nothing private is exposed. What leaks across is data from other non-draft projects.
The fix scopes the queryset to the requested project, which is what the three sibling endpoints already do. It also adds a test that pins the invariant for all four project-required list endpoints, so the next one added is checked automatically.
Why the existing requirement did not prevent this
"Require project_id on list endpoints for the four hot tables" (#1250) added the parameter requirement to four viewsets, with the stated aim of stopping a full-table COUNT during pagination. Three of those viewsets resolve the project inside
get_queryset()and filter by it. The detections viewset called the same resolver fromlist()and discarded the result, so the parameter was validated but never applied.The effect is that the requirement only deterred callers who omitted the parameter. A caller who supplied it still triggered the full-table COUNT the requirement exists to prevent. The behaviour looked symmetric across the four viewsets in the diff; the asymmetry was in what each one did with the resolved project.
List of Changes
DetectionViewSet.get_queryset()filters onsource_image__project, mirroringClassificationViewSetandOccurrenceViewSet.get_queryset(), which runs before pagination issues its COUNT.project_idon a detections list request still returns 400 when it is missing.get_queryset()calls the same resolverlist()used to; the redundant call inlist()is removed, and the@extend_schemaparameter documentation is unchanged.TestProjectScopingOnListEndpointsasserts returned ids andcountstay within the requested project, resolving each model's path toProjectthroughget_project_accessor().Notes
Detail routes now return 404 when
project_idnames a different project than the object belongs to. That matches how the occurrences and classifications detail routes already behave, so it is a consistency change rather than a regression.The new test guards against passing vacuously: it asserts that the requested project has rows and that rows exist outside it before checking that the response contains only the former. Without both guards a scoping test can pass on an empty fixture.
Verification
The test was run against this branch with the fix reverted, to confirm it fails in the direction that matters. Without the scoping change:
The captures, occurrences and classifications cases pass in that same run, so the test isolates detections as the only endpoint missing the filter rather than failing indiscriminately. With the fix restored, both tests pass.