bcquality/microsoft/knowledge/privacy/avoid-strsubstno-prebuild-before-error.md
Jesper Schulz-Wedde 186d8a1314
Some checks failed
Validate knowledge index / validate-index (push) Has been cancelled
Validate AL review fixtures / validate-review-fixtures (push) Has been cancelled
Validate frontmatter and structure / validate (push) Has been cancelled
Complete AL review knowledge readiness (#108)
* Complete AL review knowledge readiness

Fill telemetry and Query coverage, strengthen thin review domains, correct audited content defects, and add deterministic cheap-model evaluation and reference-integrity safeguards.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 9825b012-e653-496a-9310-c1f4b6f8ac27

* Generalize review fixture discovery

Derive smoke cases from the leaf, domain, and paired-sample conventions so new leaves require no scoring-contract changes. Keep only exceptional selection/context overrides and fail when retrieval metadata cannot rank the selected article.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 9825b012-e653-496a-9310-c1f4b6f8ac27

* Preserve published field IDs in sample

Keep the existing Email and Contact Email field IDs unchanged, clarify that the sample represents an independent baseline, and use a local breaking-change rule for the generic smoke evaluation.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 9825b012-e653-496a-9310-c1f4b6f8ac27

* Clarify published field identity rules

State explicitly that a published field keeps its ID, name, and type while a replacement is added as a separate field under an unused ID.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 9825b012-e653-496a-9310-c1f4b6f8ac27

* Align field obsoletion sample baselines

Use Email field ID 3 as the shared baseline so the bad example demonstrates a same-ID rename while the good example retains the original field and adds a separate replacement.

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

Copilot-Session: 9825b012-e653-496a-9310-c1f4b6f8ac27

---------

Co-authored-by: Jesper Schulz-Wedde <jesper.schulzwedde@microsoft.com>
2026-07-15 10:55:25 +02:00

26 lines
1.4 KiB
Markdown

---
bc-version: [20..]
domain: privacy
keywords: [strsubstno, error, telemetry, pii, prebuild, text-variable]
technologies: [al]
countries: [w1]
application-area: [all]
---
# Pass a Label directly as the first Error argument
## Description
Error method trace telemetry includes the AL error string only when the first `Error` argument is a `Label` or `TextConst`. Wrapping a label in `StrSubstNo`, or concatenating labels or text, produces a dynamic `Text` first argument. In that case the actual string is not emitted as the telemetry message; the platform emits its generic guidance instead. CodeCop AA0231 flags both shapes because the label identity and data-classification context are lost.
## Best Practice
Declare the complete message as a `Label` or `TextConst` and pass it directly to `Error`, followed by substitution values. The client receives the formatted message while telemetry retains the static message template without using the dynamic values as its message. Independently review whether each substitution value is appropriate to show to the current user.
See sample: `avoid-strsubstno-prebuild-before-error.good.al`.
## Anti Pattern
`Error(StrSubstNo(CustomerInvalidErr, Customer."No."))` and `Error(HeaderErr + DetailErr)` both make the first argument dynamic. They reduce error telemetry quality; they do not cause that composed string to be logged verbatim as the telemetry message.
See sample: `avoid-strsubstno-prebuild-before-error.bad.al`.