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fix: ZIP rep lookup — handle GEOID20 for 119th Congress TIGERweb layers

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The 119th Congressional Districts layer uses 2020 Census vintage field
names (GEOID20, STATEFP20, CD119FP) instead of GEOID. The GEOID check
was silently falling through; added GEOID20 fallback, isdigit() guard,
try/except on CD field parsing, and debug logging of unparseable layers.

Authored by: Jack Levy
This commit is contained in:
Jack Levy
2026-03-15 10:29:09 -04:00
parent 3d19cd571a
commit 4cada298ab
1 changed files with 20 additions and 10 deletions
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30
backend/app/api/members.py
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@@ -93,9 +93,11 @@ async def get_members_by_zip(zip_code: str, db: AsyncSession = Depends(get_db)):
if "Congressional" not in (item.get("layerName") or ""):
continue
attrs = item.get("attributes", {})
# GEOID = 2-char state FIPS + 2-char district (e.g. "1218" = FL-18)
geoid = str(attrs.get("GEOID") or "").strip()
if len(geoid) == 4:
# GEOID / GEOID20 — 2-char state FIPS + 2-char district (e.g. "0618" = CA-18)
# 119th Congress layers use GEOID20 (2020 Census vintage)
geoid = str(attrs.get("GEOID") or attrs.get("GEOID20") or "").strip()
if len(geoid) == 4 and geoid.isdigit():
state_fips = geoid[:2]
district_fips = geoid[2:]
state_code = _FIPS_TO_STATE.get(state_fips)
@@ -103,16 +105,24 @@ async def get_members_by_zip(zip_code: str, db: AsyncSession = Depends(get_db)):
if state_code:
break
# Fallback: explicit field names
# Fallback: explicit field names (e.g. CD119FP + STATEFP20)
cd_field = next((k for k in attrs if re.match(r"CD\d+FP$", k)), None)
state_field = next((k for k in attrs if "STATEFP" in k.upper()), None)
if cd_field and state_field:
state_fips = str(attrs[state_field]).zfill(2)
district_fips = str(attrs[cd_field])
state_code = _FIPS_TO_STATE.get(state_fips)
district_num = str(int(district_fips)) if district_fips.strip("0") else None
if state_code:
break
try:
state_fips = str(attrs[state_field]).zfill(2)
district_fips = str(attrs[cd_field]).zfill(2)
state_code = _FIPS_TO_STATE.get(state_fips)
district_num = str(int(district_fips)) if district_fips.strip("0") else None
if state_code:
break
except (ValueError, TypeError):
pass
logger.debug(
"ZIP %s: could not parse layer %r — attrs: %s",
zip_code, item.get("layerName"), list(attrs.keys()),
)
if not state_code:
logger.warning(