mirror of
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a9f3c50863
The previous LLM-generated knowledge files contained factual
hallucinations. The most visible was the claim that `FindFirst` /
`FindLast` "forces a full-table scan" on an unfiltered record - it does
not; those APIs return a single row via the current key.
Other inaccuracies the audit found and fixed:
* `FindSet(true)` was described as "taking a LockTable". The correct
upstream phrasing is that `FindSet(true)` sets
`ReadIsolation::UpdLock` on the read. UpdLock and LockTable are
related but distinct mechanisms.
* The list of production-scale tables had been invented beyond the
upstream source (e.g. "Detailed Cust. Ledg. Entry") without a
citation. The regenerated list matches the ten tables upstream lists
with their P95 row counts.
* `SetLoadFields` guidance had been augmented with an extra mechanism
claim ("the database resolves the filter using the index without
hydrating the value") not present in upstream.
Approach: full regeneration of `microsoft/knowledge/` from the six
upstream BCApps Code Review instruction files, with Microsoft Learn /
the AL language reference as a secondary source. Every claim in every
regenerated file is anchored to a verbatim upstream quote (or a Learn
URL); the audit trail lives in artifacts/trace-<domain>.json on the
session workspace.
The PR #11 transaction/error-handling cluster is preserved verbatim:
* performance/understand-implicit-transaction-boundary.md
* performance/codeunit-run-as-atomic-sub-operation.{md,good.al,bad.al}
* performance/codeunit-run-requires-prior-commit-inside-transaction.{md,good.al,bad.al}
* performance/use-tryfunction-for-error-catching-not-rollback.{md,good.al,bad.al}
* performance/avoid-commit-inside-loops.{md,good.al,bad.al}
* security/commitbehavior-attribute-scopes-explicit-commits.{md,good.al,bad.al}
* testing/transactionmodel-attribute-governs-test-transactions.{md,good.al,bad.al}
These articles already cite Microsoft Learn and were carefully
cross-referenced; the regeneration skips their topics rather than
duplicating them.
File counts after regeneration:
performance 35 .md (5 preserved + 30 new)
privacy 17 .md
security 18 .md (1 preserved + 17 new)
style 33 .md
testing 1 .md (preserved)
ui 19 .md
upgrade 18 .md
Total 141 atomic knowledge files, each strictly one rule. All pass
.github/scripts/validate_frontmatter.py with 0 errors and 0 warnings.
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
25 lines
1.5 KiB
Markdown
25 lines
1.5 KiB
Markdown
---
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bc-version: [all]
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domain: ui
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keywords: [style-expr, style, boolean, text-variable, accessibility]
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technologies: [al]
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countries: [w1]
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application-area: [all]
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---
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# StyleExpr: Boolean toggle vs Text variable
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## Description
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`StyleExpr` on a page field serves two distinct purposes depending on its type:
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- **Boolean** — When `StyleExpr` is a Boolean expression, it controls whether the `Style` property is applied. In this case the `Style` property carries the style name; analyze `Style` and ignore `StyleExpr` itself.
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- **Text** — When `StyleExpr` is a Text variable (e.g. `StyleExpr = StatusStyle` where `StatusStyle: Text` and is assigned literals such as `'Favorable'`), the variable contains the style name at runtime. There may be no `Style` property at all — the `StyleExpr` variable **is** the style.
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When `StyleExpr` is Text, you must trace the variable's assignments — typically in `OnAfterGetRecord` or `OnAfterGetCurrRecord` — to determine which styles can be applied, then apply the same accessibility rules as for a literal `Style` value.
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## Best Practice
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Inspect the declared type of the symbol referenced by `StyleExpr` before drawing conclusions. If it is Boolean, evaluate the `Style` property. If it is Text, follow every assignment to the variable and check the full set of possible style values against `cosmetic-styles-need-no-textual-context.md` and `semantic-styles-need-independent-textual-meaning.md`.
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See sample: `style-expr-text-vs-boolean.good.al`.
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