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fix(data): KML, GPX and CSV with WKT write numbers in full and null names as nothing - #1786
KML, KMZ and GPX exports, and Data Interop's CSV with WKT, wrote attribute values with Value's Display, the format for showing a value on screen. As a result:
Numbers were rounded to 6 decimals: 0.1234567891 was written as 0.123457, and 1e-9 as 0.
A null name was written as the text <Null>, so a KML or GPX file read back had features named <Null>.
Nothing said so. CSV export already wrote numbers in full; its comment says Display rounds to 6 decimals.
New Value::to_file_text: a number as the shortest text that reads back as the same number, and nothing for null. Every other value is written as before.
to_kml (names and ExtendedData), to_gpx (names) and to_wkt_csv now use it, and so does CSV's csv_cell, which did the same thing inline.
Reading had the same loss: a GeoJSON column mixing text and numbers is read as text, and coerce turned its numbers into text with Display, so 0.1234567891 became "0.123457". It now uses to_file_text too.
Booleans keep their True/False text, and text and integers are unchanged.
Testing
cargo xtask ci.
New kml_gpx_and_wkt_csv_write_values_as_stored writes 0.1234567891, 1e-9 and a null name through all three writers. It checks the full numbers and the empty name, and that no Null text appears. A numeric name is written in full in KML and GPX. The existing writes_kml_gpx_wkt covers clean values.
New a_mixed_geojson_column_keeps_its_numbers_in_full reads a GeoJSON column of "a" and 0.1234567891 and gets the number as "0.1234567891".
Found by an export round-trip property test: generated layers were exported to each format, read back, and compared.
Related issue
None.
Summary by CodeRabbit
Bug Fixes
Exported numeric values retain full precision in KML, GPX, WKT, CSV, and text-typed GeoJSON properties.
Null values are written as empty text where applicable; KML continues to omit null attributes.
…ames as nothing
They wrote attribute values with Value's Display, the format for showing
a value: numbers were rounded to 6 decimals (1e-9 became 0) and a null
name became the text "<Null>". Value::to_file_text writes a number as the
shortest text that reads back as the same number, and null as nothing;
CSV's csv_cell, which did the same inline, uses it too.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
No actionable comments were generated in the recent review.
Walkthrough
A new Value::to_file_text method formats values for file output. KML, GPX, WKT CSV, GeoJSON text properties, and CSV cells use this method. Tests cover full-precision numeric output and null formatting.
Changes: File-text serialization
Layer / File(s)
Summary
Add file-text formatting crates/data/src/value.rs
Adds Value::to_file_text for null, float, and other values.
Use file-text formatting in exporters crates/data/src/interop.rs, crates/data/src/io.rs
KML, GPX, WKT CSV, GeoJSON text properties, and CSV cells use the new formatter. Tests cover numeric precision and null handling.
Exports now keep full numeric precision and write null names as empty text instead of the literal null marker. No actionable merge-blocking risk is evident.
Pre-merge checks: 5
Check name
Status
Explanation
Title check
The title clearly summarizes the main change: preserving full numeric precision and writing null names as empty text in KML, GPX, and CSV with WKT.
Docstring Coverage
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…
Linked Issues check
Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check
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Description check
The description includes a clear summary, detailed testing information, and a related-issue status. It omits the required UI evidence section, but the changes are non-visual and the omission is non-cr…
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Explanation
Docstring coverage is 100.00% which is sufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 6 functions across 3 files.
Full details: Description check
Explanation
The description includes a clear summary, detailed testing information, and a related-issue status. It omits the required UI evidence section, but the changes are non-visual and the omission is non-critical.
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A rabbit checks the numbers bright, Their digits stay in clearer sight. Nulls leave an empty place, Exports keep each value’s trace. KML and GPX join the queue, CSV carries precision through.
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crates/data/src/interop.rs
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The change is correct as far as I can verify by reading. I found no bugs, security issues or performance problems in the changed lines. I could not compile or run the new test here, so CI is the first real check of it.
Bugs
Outside the diff, same loss (confidence ~60%):coerce in crates/data/src/io.rs:1362 still does Value::Text(v.to_string()) for non-text values in Text-typed fields. It is reached from the GeoJSON property reader (io.rs:1182) and from citymodel.rs:849. A number in such a column is rounded to 6 decimals with no notice, which is the loss this PR fixes elsewhere. The one-token fix is v.to_file_text(). I did not trace how field types are inferred, so I have not confirmed that a mixed column reaches this path in practice.
Security
None found. The xml() and q() escaping on the changed lines is unchanged.
Performance
None found. to_file_text allocates the same as the to_string() calls it replaces.
Quality
Non-finite floats (confidence ~50%, pre-existing):to_file_text writes NaN and ±inf as NaN / inf text in KML, GPX and CSV. Display already did the same, so this is not a regression. JSON writes null for non-finite values (value.rs:62, :131). The new doc comment says "a number" without covering this case, so it is worth either documenting or deciding explicitly.
AGENTS.md
Never silent: full-precision output removes an approximation, so no notice is needed. The null-name change is not a loss.
Never crash: no unwrap, expect, panic or indexing is added.
Test both ways: kml_gpx_and_wkt_csv_write_values_as_stored covers the lossy inputs (0.1234567891, 1e-9, a null name). The helper signatures it uses (Dataset::new, push, Field, FieldType, Value) match the code.
Layering: all changes stay in crates/data.
I checked that to_file_text matches the old output for the other cases: integers, booleans, text, integer-valued floats including -0.0, and the CSV formula guard.
Prior review threads: none on this PR, so nothing was left alone.
Change size
Compared: the whole PR against main (merge base 2ce3d75 to PR head 157a9e1).
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Actionable comments posted: 1
Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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Inline comments:
Review comments at @crates/data/src/interop.rs:
- Around line 536-537: Extend the test around the shown `ds.push` calls with a
feature whose name attribute is numeric, and assert that its full textual value
appears in both KML and GPX output. Preserve the existing numeric-attribute
checks.
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crates/data/src/interop.rs
crates/data/src/io.rs
crates/data/src/value.rs
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Review of opengeos#1786: coerce turned a number in a text column into text with
Display, rounding it to 6 decimals, when a GeoJSON column mixes text and
numbers. It now uses Value::to_file_text. The KML/GPX test also covers
a numeric name.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
coerce outside the diff: confirmed and fixed. A GeoJSON column of text and numbers is read as text, and coerce turned its numbers into text with Display, rounding them. It now uses to_file_text. New a_mixed_geojson_column_keeps_its_numbers_in_full covers it.
Non-finite numbers as text:to_file_text writes NaN and infinity as NaN / inf, as Display did. Documenting or changing that is left for the release quality pass.
I found no bugs, security problems, or performance problems in the changed lines. The change is small and I checked its behaviour against the existing code. I posted no inline comments because nothing cleared the bar for one. The two quality points below are for the summary only.
Bugs
None found. to_file_text matches the old output for every value except finite floats, which now print in full, as the PR intends. Integers, booleans and text are unchanged, and NaN/inf print as before. The csv_cell refactor keeps the same output for null, text and float. The formula guard in to_wkt_csv still leaves negative numbers unprefixed. The new test expectations match what the writers produce. Confidence: high.
Security
None found. The change only alters how values are formatted. Output stays XML-escaped and CSV-quoted as before. Confidence: high.
Performance
None found. Each value still costs one String allocation, as the old to_string did. Confidence: high.
Quality
Calculate Field still rounds decimals written into text fields to six places (crates/engine/src/cmd/edit.rs:124-126, documented in docs/user-guide/expressions.md:185). That is documented, so it is not silent, but it is the same precision loss this PR removes from readers and writers. Confirm the author is happy to leave it and say so in the PR. Confidence: medium.
A null name is now written as an empty <name> in KML and GPX (crates/data/src/interop.rs:68 and :97), with no fallback to the feature id. The previous output was <Null>, which was also unhelpful. Consider the fallback, or leave it as is. Confidence: low.
AGENTS.md
No violations found. There is no unwrap or expect in non-test code, and no new dependency or UI text. The change adds no lossy path, so it needs no notice. The new tests cover full precision and clean inputs. Confidence: high.
Earlier concerns: 1 was left alone. It is the CodeRabbit thread asking for a numeric-name test. It is resolved, and the author added the test in e2f09b3.
Change size
Compared: the whole PR against main (merge base 2ce3d75 to PR head e2f09b3).
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Summary
KML, KMZ and GPX exports, and Data Interop's CSV with WKT, wrote attribute values with
Value'sDisplay, the format for showing a value on screen. As a result:0.1234567891was written as0.123457, and1e-9as0.<Null>, so a KML or GPX file read back had features named<Null>.Nothing said so. CSV export already wrote numbers in full; its comment says
Displayrounds to 6 decimals.Value::to_file_text: a number as the shortest text that reads back as the same number, and nothing for null. Every other value is written as before.to_kml(names andExtendedData),to_gpx(names) andto_wkt_csvnow use it, and so does CSV'scsv_cell, which did the same thing inline.coerceturned its numbers into text withDisplay, so0.1234567891became"0.123457". It now usesto_file_texttoo.True/Falsetext, and text and integers are unchanged.Testing
cargo xtask ci.kml_gpx_and_wkt_csv_write_values_as_storedwrites0.1234567891,1e-9and a null name through all three writers. It checks the full numbers and the empty name, and that noNulltext appears. A numeric name is written in full in KML and GPX. The existingwrites_kml_gpx_wktcovers clean values.a_mixed_geojson_column_keeps_its_numbers_in_fullreads a GeoJSON column of"a"and0.1234567891and gets the number as"0.1234567891".Found by an export round-trip property test: generated layers were exported to each format, read back, and compared.
Related issue
None.
Summary by CodeRabbit