nautilus / gateway / 25079600478

92%

push

github

Fix inline fragment fields ignoring parent location priority (#230)

Fields inside inline fragments were using fieldLocations[0] directly instead of calling selectLocation(), which respects parent location priority. This caused some fields defined in multiple backends — to be routed to the first registered backend rather than staying with the parent step's backend.

When a lower-position backend (e.g. auth-service at position 0) defined a shared type, the planner would create a dependent sub-step targeting that backend. The sub-query was wrapped with the parent union type, which the backend didn't recognize, causing a GraphQL validation error.

The fix calls selectLocation() for inline fragment fields, matching the behavior already used for regular fields

2 of 2 new or added lines in 1 file covered. (100.0%)

2589 of 2805 relevant lines covered (92.3%)

369.54 hits per line