fix: display exception message in trace output column when outputs is nullfix: display exception message in trace output column when outputs is…

[unfitcoder101]

Summary

Display exception message in the trace output column when outputs are null.

Previously, when a trace span had an exception event but no outputs,
the output column showed an em dash (—). Now it shows the exception
message/type in red so users can immediately see what failed without
opening the trace detail view.

Changes

• Modified getObservabilityColumns.tsx to check record.events for exception events when outputs are null
• Display exception.message or exception.type as fallback text
• Exception styled in red for visual distinction

Demo

Issue

Fixes #4731

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[github-actions]

✅ Thanks @unfitcoder101! This PR now meets the contribution requirements and has been reopened. A maintainer will review it soon.

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: f147200d-cf87-4bfa-85fa-8c3af24334dd

📥 Commits

Reviewing files that changed from the base of the PR and between a97e608 and 2646663.

📒 Files selected for processing (1)

• web/oss/src/components/pages/observability/assets/getObservabilityColumns.tsx

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📝 Walkthrough

Summary by CodeRabbit

• Bug Fixes
  • The Outputs column now displays exception messages when trace outputs are unavailable, highlighted in red for better visibility.

Walkthrough

The "Outputs" column renderer in the observability table is updated to detect a missing outputs value paired with an exception event on the trace record. When that condition is met, it extracts the exception message from attributes (with fallbacks to exception.type or "Exception") and renders it via SmartCellContent with red text styling.

Changes

Exception fallback in Outputs column

Layer / File(s)	Summary
Outputs column exception fallback rendering web/oss/src/components/pages/observability/assets/getObservabilityColumns.tsx	The render function now computes outputs, locates an exception event in the record, and sanitizes outputs when present. If outputs is falsy and an exception event exists, it renders the exception message (using exception.message, falling back to exception.type or "Exception") via SmartCellContent with red text styling instead of the previous em-dash placeholder.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~5 minutes

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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