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Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com> Copilot-Session: 9c2eebc4-dcd5-4b85-8113-90772d818900
22 lines
1.3 KiB
Markdown
22 lines
1.3 KiB
Markdown
---
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bc-version: [all]
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domain: security
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keywords: [validatetablerelation, tablerelation, field, validation, input]
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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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# Handle free-form input when ValidateTableRelation is false
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## Description
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`ValidateTableRelation = false` intentionally lets a user keep free-form input even when it does not match `TableRelation`. This is supported for scenarios such as accepting a new vendor name and handling it in `OnValidate`. The risk is not the property itself; it is leaving downstream code to assume that every value identifies an existing related record.
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## Best Practice
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Keep the default validation when values must exist in the related table. When free-form values are intentional, set both `ValidateTableRelation = false` and `TestTableRelation = false`, then add compensating `OnValidate` logic that normalizes, validates, creates, or otherwise handles unmatched input. Document that downstream code must not assume the relation exists. See sample: `validatetablerelation-false-on-user-input.good.al`.
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## Anti Pattern
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`ValidateTableRelation = false` on a user-facing field with no intentional handling for unmatched values, or leaving `TestTableRelation = true` so database relation tests reject values the UI deliberately accepts. See sample: `validatetablerelation-false-on-user-input.bad.al`.
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