related({ from }) / related({ to }) each return one direction; related({ node })
unions both (every edge where the node is source OR target), deduped, in a single
O(degree) call — the indexed equivalent of merging two related() calls by hand.
The 'all edges on a noun' query the graph-viz path needs.
- RelatedParams.node: mutually exclusive with from/to (throws if combined);
composes with type/subtype/visibility filters; natural-key ids resolved.
- Implemented as a parallel out-edge (sourceId) + in-edge (targetId) fetch through
the O(degree) graph-index fast paths, merged + deduped by id (a self-loop appears
once), sorted for a stable page. Full incidence is the intended O(degree) cost;
deep offset paging of a very-high-degree node is best-effort (use the native
edgesForNode / a graph cursor for exhaustive paging).
- db.related() parity: node resolved + honored in relationMatchesParams (matches an
edge incident in either direction) for the historical/overlay paths.
Test: related-node-bidirectional.test.ts — both directions, equals from∪to, self-loop
dedupe, type-filter composition, default-hides-internal, node+from/to throws.
