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Ensure Normalize func preserves milliseconds precision #423

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Merged
merged 3 commits into from
Sep 13, 2025
Merged

Ensure Normalize func preserves milliseconds precision #423

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6c0c60a
fix: Ensure Normalize func preserves milliseconds precision
Sep 1, 2025
240552f
Merge branch 'main' into CAT-1413
YuriZmytrakov Sep 10, 2025
cf256e9
docs: updating changelog
Sep 10, 2025
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1 change: 1 addition & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.

- Added `id` field as secondary sort to sort config to ensure unique pagination tokens. [#421](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/421)
- Added default environment variable `STAC_ITEM_LIMIT` to SFEOS for result limiting of returned items and STAC collections [#419](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/419)
- Updated the `format_datetime_range` function to support milliseconds. [#423](https://github.com/stac-utils/stac-fastapi-elasticsearch-opensearch/pull/423)

### Changed

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5 changes: 4 additions & 1 deletion stac_fastapi/core/stac_fastapi/core/datetime_utils.py
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Expand Up @@ -17,17 +17,20 @@ def format_datetime_range(date_str: str) -> str:
"""

def normalize(dt):
"""Normalize datetime string and preserve millisecond precision."""
dt = dt.strip()
if not dt or dt == "..":
return ".."
dt_obj = rfc3339_str_to_datetime(dt)
dt_utc = dt_obj.astimezone(timezone.utc)
return dt_utc.strftime("%Y-%m-%dT%H:%M:%SZ")
return dt_utc.isoformat(timespec="milliseconds").replace("+00:00", "Z")

if not isinstance(date_str, str):
return "../.."

if "/" not in date_str:
return f"{normalize(date_str)}/{normalize(date_str)}"

try:
start, end = date_str.split("/", 1)
except Exception:
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