FA-45222 / Data systems / Member archive

Nested field resolution reuses the current object when a field is absent · case 02

Nested field resolution reuses the current object when a field is absent.

Member previewVariant 2 · 3 implementations · 7 checks per implementation

Case contract

Resolve an explicit sequence of field path segments against each row dictionary. Dots inside a segment are literal characters; empty path returns the whole row. A missing segment, non-dictionary intermediate, or null intermediate yields None; falsy leaf values remain present.

Why this case matters

A bounded deterministic data engine model makes representation and changelog faults reproducible.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
missing segment	`[{"b": 2}]`	`[null]`	Failed

MEMBER ARCHIVE

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