chore(changelog): clarify array attributes impact on beforeSend* callbacks#21186
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Move the array attributes entry to the top of the 10.54.0 Important Changes section and explicitly call out that beforeSend* callbacks assuming primitive attribute values need to be updated. Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
nicohrubec
changed the title
beforeSend* callbacks
Lms24
approved these changes
May 28, 2026
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| - **feat(core): Support array attributes for spans, logs, and metrics ([#20427](https://github.com/getsentry/sentry-javascript/pull/20427))** | ||
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| Arrays of primitive values (`string`, `number`, `boolean`) are now accepted as attribute values. Arrays containing non-primitive elements will be dropped and won't show up in Sentry. Array attributes on logs and metrics were previously stringified and will now be sent as actual arrays instead. **If you have custom rules that process attribute values in any `beforeSend*` callbacks (e.g., PII scrubbing), you may need to update them to correctly handle array values.** |
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We can add a code example here how to work with array attributes:
beforeSendLog: log => {
const attributes = log.attributes;
Object.keys(attributes).foreach(key => {
const attributeValue = attributes[key];
const attributeType = typeof attributeValue;
if (attributeType === 'string') {
attributes[key] = scrubDataFromString(attributeValue);
}
if (attributeType === 'array') {
attributes[key] = attributeValue.map(v => typeof v === 'string' ? scrubDataFromString(v) ? v);
}
})
}
Co-authored-by: Lukas Stracke <lukas.stracke@sentry.io>
Lms24
approved these changes
May 28, 2026
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The last release shipped array attribute support, which can subtly break user hooks if users have special treatment for these. Update the changelog to be a bit more explicit about this behavioral change.