bcquality/microsoft/knowledge/data-modeling/tablerelation-field-length-must-match-related-field.bad.al
Michael Dieringer 260d064ece Add TableRelation field-length and RecordRef.Open Temp knowledge
- data-modeling: tablerelation-field-length-must-match-related-field
  (exact length for unconditional relations, at least the longest target
  when all relations are conditional; no compile-time diagnostic)
- testing: recordref-open-temp-parameter-defeats-real-table-checks
  (a temp-opened RecordRef is empty, so existence/uniqueness checks on it
  never see persisted rows; cross-links use-generateguid article)
- Wire both into the review leaves and register the fixture pairs.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 23:18:10 +02:00

30 lines
666 B
AL

table 50100 "Sample Category"
{
fields
{
field(1; "Code"; Code[20]) { }
}
keys
{
key(PK; "Code") { Clustered = true; }
}
}
table 50102 "Sample Contract"
{
fields
{
field(1; "Code"; Code[20]) { }
// Code[10] cannot hold every "Sample Category"."Code" value (Code[20]).
// Compiles without a diagnostic; picking a category code longer than
// 10 characters through the lookup fails at runtime.
field(2; "Category Code"; Code[10])
{
TableRelation = "Sample Category"."Code";
}
}
keys
{
key(PK; "Code") { Clustered = true; }
}
}