Exclude non-revenue stops from stop search - #1304
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughStop-name FTS searches now require a related stop time with unrestricted or NULL pickup or drop-off before applying the result limit. Tests cover restricted values, omitted columns, route-type filtering, and imported feeds. ChangesRevenue-service stop search
Priority: ⬇️ Low Estimated code review effort: 3 (Moderate) | ~20 minutes Change: Bug fix · Severity of issue fixed: Low Sequence Diagram(s)sequenceDiagram
participant SearchHandler
participant FTSQuery
participant StopTimes
SearchHandler->>FTSQuery: searchStopsByName(name, limit)
FTSQuery->>StopTimes: Check for qualifying stop_time
StopTimes-->>FTSQuery: Return unrestricted or NULL pickup/drop-off
FTSQuery-->>SearchHandler: Return filtered stops before LIMIT
Suggested reviewers: Merge Risk: ⚪ Minimal · up to The search now excludes stops without revenue service while preserving qualifying results and limit behavior; no merge-blocking risk is identified. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Docstring CoverageExplanation Docstring coverage is 16.67% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 6 functions across 4 files. (1 skipped: 1 unsupported.)
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Inline comments:
In `@internal/restapi/search_stops_handler_test.go`:
- Around line 683-686: The revenue-service test data currently covers only
restricted pickup/drop-off type 2. Extend the test around the revenue_trip_4
setup with a stop time using both pickup_type and drop_off_type set to 3, and
assert that the associated stop is excluded from the results.
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gtfsdb/fts_queries.gogtfsdb/fts_queries_test.gointernal/restapi/search_stops_handler_test.go
Code reviewFound 2 issues:
Lines 96 to 113 in 93fe82d
maglev/internal/restapi/search_stops_handler_test.go Lines 692 to 698 in 93fe82d 🤖 Generated with Claude Code - If this code review was useful, please react with 👍. Otherwise, react with 👎. |
aaronbrethorst
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The instinct here is right — non-revenue stops genuinely shouldn't surface in stop search, doing the filtering in SQL rather than in Go is the correct call, and gtfsdb/fts_queries.go is the sanctioned place for hand-written FTS5 syntax, so no make models concern. The index coverage is fine too.
But the predicate rests on a premise about how these columns are stored that doesn't hold, and the consequence is severe enough that I don't want to land it.
COALESCE(pickup_type, 0) = 0 never fires for feeds that omit or blank these columns — and those stops all disappear from stop search.
The chain, which I traced end to end:
- A blank cell or a missing column reaches
parsePickupDropOffPolicy(""), which falls through todefault:and returnsPickupDropOffPolicy_No= 1, not 0 (go-gtfs@v1.1.1/enums.go:130-141). toNullInt64only returns NULL for a literal 0, so that 1 is persisted as 1 (gtfsdb/helpers.go:667).COALESCE(1, 0)is1, both sides of theORfail, theEXISTSfails, and the stop is filtered out.
So the storage semantics are the inverse of what the query assumes: an explicit 0 in the CSV becomes NULL in the database, while blank or missing becomes 1 — indistinguishable from a genuine "no pickup here". A feed that simply doesn't ship pickup_type/drop_off_type — spec-legal, and the common case — gets an empty /api/where/search/stop.json for every query.
The tests pass because raba.zip writes literal 0s. This repo's own testdata/gtfs.zip has neither column, so every one of its stop times would store 1. The revenue_null_columns fixture inserts rows via raw SQL and bypasses the importer entirely, so its comment that NULL is "the shape every real feed row is stored in" is describing something the import path never actually produces.
The fix belongs at the import layer: normalize the library's "unspecified → 1" back to 0 before persisting, so that NULL/0 genuinely means "allowed". Once the stored values mean what the SQL assumes, this predicate is correct as written. Doing it purely in SQL isn't possible — at that point 1 really is ambiguous.
One smaller thing worth a look while you're in here: treating types 2 (phone agency) and 3 (coordinate with driver) as non-revenue matches the OBA reference implementation, but those are boardable for demand-responsive service. Fine to keep as-is given the issue, just flagging it since it interacts with the GTFS-Flex work.
Happy to re-review once the import-layer normalization is in — the search-side change is good.
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Confirmed the whole chain — thanks. One correction: the import layer can't normalize this. So the fix goes in go-gtfs, where the raw cell still exists: empty means Written and tested locally, ready to open against the fork (which has issues // parsePickupDropOffPolicyOrYes parses a stop_times.txt pickup_type or
// drop_off_type cell, which the GTFS spec defines as 0 (regularly scheduled)
// when empty or absent. This differs from continuous_pickup and
// continuous_drop_off, which default to 1, so those keep using
// parsePickupDropOffPolicy directly.
func parsePickupDropOffPolicyOrYes(s string) PickupDropOffPolicy {
if s == "" {
return PickupDropOffPolicy_Yes
}
return parsePickupDropOffPolicy(s)
}- PickupType: parsePickupDropOffPolicy(pickupTypeColumn.ReadOr("")),
- DropOffType: parsePickupDropOffPolicy(dropOffTypeColumn.ReadOr("")),
+ PickupType: parsePickupDropOffPolicyOrYes(pickupTypeColumn.Read()),
+ DropOffType: parsePickupDropOffPolicyOrYes(dropOffTypeColumn.Read()),
ContinuousPickup: parsePickupDropOffPolicy(continuousPickupColumn.ReadOr("")),
ContinuousDropOff: parsePickupDropOffPolicy(continuousDropOffColumn.ReadOr("")),Tests cover absent columns, blank cells, explicit On this branch now:
The test is red until go-gtfs merges and is pinned here. Say if you'd rather |
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Inline comments:
In `@gtfsdb/fts_queries.go`:
- Around line 103-107: Upgrade the github.com/OneBusAway/go-gtfs dependency to a
version that parses missing and blank pickup_type/drop_off_type fields as 0,
preserving the existing toNullInt64 and FTS filtering behavior. Verify that
TestImportedStopTimesOmittingPickupColumns passes with the upgraded parser.
Apply the same fix in `@gtfsdb/stop_time_revenue_import_test.go` around lines 33 -
36: Covers the import normalization and required test additions for omitted and
blank fields.
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Fix all unresolved CodeRabbit comments on this PR:
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gtfsdb/fts_queries.gogtfsdb/stop_time_revenue_import_test.gointernal/restapi/search_stops_handler_test.go
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The upstream fix is now open: OneBusAway/go-gtfs#5 parses an empty or absent On the CodeRabbit findings against Once OneBusAway/go-gtfs#5 merges, the remaining change here is one commit: That turns |
Code reviewFound 2 issues:
maglev/gtfsdb/stop_time_revenue_import_test.go Lines 40 to 60 in ac64f92
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First: sorry for the slow reply. You asked me a direct question on 14 Aug about
whether to hold the regression test off the branch, and you deserved an answer
well before now. Answering it below.
You were right, and you proved it properly. My 9 Aug point was that the fix
belonged at the import layer so a stored NULL/0 genuinely means "allowed". You
came back and showed that helpers.go can't make that distinction — go-gtfs's
parsePickupDropOffPolicy collapses a blank field and a literal 1 to the same
_No value (enums.go:130-141), so by the time we see it the information is
gone. I verified that chain in the module cache against the pinned v1.1.1 and
it holds. Opening OneBusAway/go-gtfs#5 was the correct move, not a workaround.
You also cleared the rest of my earlier list: the revenue_null_columns fixture
comments are corrected, TestImportedStopTimesOmittingPickupColumns goes through
the real ParseGtfsData → StoreGtfsData path instead of hand-writing rows, and
the TestSearchStopsHandlerRouteTypeExclusion fixtures no longer lean on
zero-stop_times stops. Putting the SQL in fts_queries.go is right too — that's
the sanctioned hand-written exception, so there's no make models question here.
The answer to your question: keep the test on the branch, and we hold the
whole PR until go-gtfs#5 merges.
Committing it red was the honest call — it documents the blocker instead of
hiding it, and this PR was never going to merge ahead of the upstream change
anyway. Test (ubuntu-latest) and Test (windows-latest) are failing on exactly
your two assertions ("Should be zero, but was 12"; "[]" should have 3 item(s)),
which is the defect doing its job, not noise. Merging today would break
/api/where/search/stop.json for spec-legal feeds that omit the columns, so
there's nothing to gain by rearranging the branch.
go-gtfs#5 is still open and go.mod still pins v1.1.1. Reviewing and merging
that is the unblocking action and it's mine to do — I'll pick it up. Once it's
tagged, bump the dependency in this PR, CI should go green, and I'll merge.
Two things you can fix in the meantime:
-
gtfsdb/fts_queries.go:103-107— the comment states the opposite of what
happens. It says go-gtfs "normalizes to 0 at parse time" and that "a stored
1 is always an explicit 'not allowed'". Neither is true for the pinned
version — that's the whole reason this PR is blocked. A load-bearing comment
that asserts the inverse of reality is worse than no comment, because the next
person reads it and trusts it. Please rewrite it to describe actual current
behavior and reference go-gtfs#5, then update it again when the bump lands.
The doc comment atstop_time_revenue_import_test.go:20-22repeats the same
claim in past tense. -
Minor: the first assertion in
TestSearchStopsHandlerRouteTypeExclusion
("Test 0 routes exclusion",search_stops_handler_test.go:648) no longer
exercises the zero-route branch it's named for —zero_route_stopis now
filtered out in SQL before the handler runs. You noted this in a comment so
it's knowing rather than accidental, but the label is now misleading. Worth
renaming or re-pointing it.
Marking changes requested to keep it out of the merge queue while upstream is
pending — that's bookkeeping, not a comment on the work. Thanks for the
patience on this one.
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Both fixed, and agreed on holding the PR. 1. 2. Zero-route assertion (2910448) — relabeled to what it now covers, a stop Worth flagging on that second one: I didn't re-point it, because the handler's Otherwise holding for go-gtfs#5 — the bump is one commit whenever it's tagged. |
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Thanks for the fixes since my last review. The comment in fts_queries.go and the import test's doc comment now describe go-gtfs v1.1.1 accurately, and the "0 routes" assertion label makes sense. The predicate itself also matches Java: BundleSearchServiceImpl.init() only indexes stops that pass stopHasRevenueService, which checks dropOffType == 0 || pickupType == 0. Filtering ahead of LIMIT matches how those stops never count toward Java's results.
It still can't merge. CI is red on your own TestImportedStopTimesOmittingPickupColumns, and the failure is real rather than flaky. Under go-gtfs v1.1.1, blank or missing pickup/drop-off cells import as 1, so the COALESCE(..., 0) = 0 checks never pass for those rows.
This shows up in real data, not just synthetic feeds. King County Metro's stop_times.txt has both columns, but 96 rows leave them blank (all 12 Easy Loop trips on route 7994). After import those are the only 1|1 rows, and three stops served only by those trips drop out of search:
| Query | Java | main | this PR |
|---|---|---|---|
1st ave & marion |
1_1557 |
1_1557 |
none |
1st ave & pine |
1_200 |
1_200 |
none |
1st ave & bell |
1_230 |
1_230 |
none |
The description says there's "no observable behavior change on current feeds," but that was checked against the Java server, which reads blank cells as 0.
So this is still blocked on go-gtfs#5 plus a version bump, as we discussed on 8/19. When you pick it back up:
- Rebase onto main.
searchStopsByNamewas rewritten there to sort by combined ID usingstop_agencies. After the rebase, re-check thelimitExceededfixture: its comment says results are ordered by stop ID, which is no longer true. - Fix the remaining stale comments.
search_stops_handler_test.gostill says a stored 1 "never" comes from a blank column and that import yields NULL for absent columns. Both are false under v1.1.1. - Check performance on broad prefixes. On the King County Metro database, a broad prefix like
"s"*goes from about 2 ms to about 350 ms with theEXISTSsubquery. Most of that is looking uppickup_typeon unindexed stop_times rows, and it hurts type-ahead, where the first keystrokes are the broadest queries. Storing a per-stop revenue flag at import, or adding a covering index, would avoid it.
The search-stop spec guarantees results never include stops lacking revenue service. Gate the full-text search on the existence of a stop time permitting unrestricted pick-up or drop-off, so the exclusion precedes truncation and limitExceeded counts only revenue stops. pickup_type and drop_off_type are persisted as NULL when the feed value is 0, so the predicate coalesces before comparing.
The revenue filter treats every pickup/drop-off type other than 0 as restricted, but the test only asserted that for type 2. Add a stop whose sole stop time uses type 3 for both columns and assert it is excluded, so a regression to a "!= 1" predicate fails on both restricted types rather than just one.
The comment on searchStopsByName's revenue predicate claimed the COALESCE was needed because import stores a value of 0 as NULL. That is true but incomplete, and it left the harder case unstated: pickup_type and drop_off_type are optional in GTFS, and an empty or absent column also means 0. State the full storage chain instead - go-gtfs normalizes an empty cell to 0 at parse time, and toNullInt64 then persists that 0 as NULL - so NULL and 0 both mean unrestricted, while a stored 1 is always an explicit "not allowed" from the feed. Correct two fixture comments in the handler test on the same basis. The NULL-columns fixture described its storage shape as the one every real feed row takes, without saying how import arrives there; the both-restricted fixture did not say that a stored 1 is unambiguous.
The revenue-service filter assumes a stored pickup_type or drop_off_type of NULL or 0 means unrestricted. Nothing tested that assumption against the importer: every existing fixture inserts stop times with raw SQL, and the RABA feed writes literal zeroes, so a feed that omits the columns entirely was never exercised. Add a test that runs a feed whose stop_times.txt declares neither column through ParseGtfsData and StoreGtfsData, then asserts no stop time stored a restricted value and that the stops stay searchable. GTFS makes both fields optional and defines an empty value as 0, so such a feed permits unrestricted pick-up and drop-off everywhere. This fails until the go-gtfs dependency carries the matching parse fix, where an absent column currently yields 1 rather than 0. It is committed ahead of that bump so the gap is recorded rather than rediscovered. Reuses buildSyntheticGTFSZip, whose stop_times.txt header already omits both columns.
The revenue-service predicate's comment claimed go-gtfs normalizes a blank pickup_type/drop_off_type to 0 at parse time, and that a stored 1 is always an explicit "not allowed" from the feed. Neither holds for the pinned v1.1.1: parsePickupDropOffPolicy returns PickupDropOffPolicy_No for anything that is not "0", "2" or "3", so a blank or absent column parses to 1 and is stored as 1. A load-bearing comment asserting the inverse is worse than none, since the next reader trusts it. Describe the storage chain as it actually is, and point at the upstream parser fix the predicate assumes: OneBusAway/go-gtfs#5 TestImportedStopTimesOmittingPickupColumns carried the same claim in past tense, as though the defective parser were behind us. Its doc comment now says that version is the one in go.mod, and that the test stays red until the bump lands.
The assertion labelled "0 routes exclusion" no longer reaches the handler's len(routeIDs) == 0 guard. zero_route_stop has no stop_times, so the revenue-service filter drops it in SQL before the handler runs, and the name now points at a branch the case does not exercise. Name it for what it covers, and record why the Go guard is unreachable behind that filter while foreign keys are enforced: a revenue stop time implies a trip, which implies an existing route.
Use pseudo-version at OneBusAway/go-gtfs#5 merge commit until a tag is cut. Blank or absent pickup_type/drop_off_type now parse as 0, which unblocks TestImportedStopTimesOmittingPickupColumns.
Rewrite the revenue-filter comments for the fixed storage chain where a stored 1 only comes from a literal feed 1. Update TestSearchStopsByNameOrdersByCombinedID for the revenue filter: the stop with no stop times is now excluded, so expect two results in combined-ID order.
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The search revenue predicate looks up pickup_type and drop_off_type per stop_id. The existing stop_id indexes are not covering, forcing a table visit per stop time. Index all three columns together.
Changes addressing recent reviewBlocker resolved
Rebased onto main (467aa83)
Stale comments fixed
Perf improvement
Validation
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comments have been addressed
3 participants
Summary
/api/where/search/stop.jsonguarantees results never include stops lacking revenueservice — at least one scheduled stop time with unrestricted pick-up or drop-off. No such
filter existed. Closes #1302.
Changes
searchStopsByName(gtfsdb/fts_queries.go) now requires a matching stop to have astop time with
pickup_type == 0ordrop_off_type == 0. Filtered in SQL, ahead ofthe
LIMIT, solimitExceededstill counts only revenue stops.pickup_type/drop_off_typeof0is stored asNULLon import (toNullInt64), sothe predicate coalesces to
0before comparing.2(phone agency) and3(coordinate with driver) are treated as restricted,not revenue — matching "unrestricted" in the spec wording.
No observable behavior change on current feeds
Checked against King County Metro (2.17M stop times) and Sound Transit rail (147K stop
times) on the deployed OBA server, plus the RABA test fixture: all three are 100%
unrestricted pickup/drop-off. On feeds shaped like these, the existing zero-route filter
already produces the guaranteed output — this change is a correctness guard for feeds
that do use restricted pickup/drop-off, not a fix for anything visibly broken today.
Tests
TestSearchStopsHandlerRevenueServiceFiltercovering both-restricted (excluded),pickup-only, drop-off-only, phone-agency
2/2(excluded — pins== 0against a!= 1regression), and NULL columns (included — the shape every real feed row has).TestSearchStopsHandlerRouteTypeExclusion'slimitExceededfixtures previously reliedon stops with zero
stop_times; reworked so they pass the new revenue filter and getexcluded by the route-type filter instead, preserving the original assertions.
gtfsdb/fts_queries_test.go'sTestSearchStopsByNamefixtures had nostop_times;gave each a revenue-passing trip so the query-level tests still exercise stop-name
matching independent of the new filter.
Test plan
go vet -tags "sqlite_fts5 sqlite_math_functions" ./...go vet -tags "purego" ./...make testgo fmt ./...(no changes)Summary by CodeRabbit