Fix: Gracefully skip invalid additional field values during E-Doc finalization

[ventselartur]

Summary

Fixes AB#623716 — [Payables Agent] Draft could not be finalised due to field length issues.

Root Cause

ApplyAdditionalFieldsFromHistoryToPurchaseLine in EDocPurchaseHistMapping.Codeunit.al uses FieldRef.Validate() to dynamically apply "additional field" values onto Purchase Line fields. The source values are stored in Text[2048]/Code[2048] fields in E-Document Line - Field, but target Purchase Line fields can be as narrow as Code[10] — causing a runtime error that halts the entire finalization. No purchase document is created even though the problematic field is a supplementary value from history, not a core field.

Fix

Wrapped FieldRef.Validate() in a [TryFunction]. On failure (length overflow, table relation failure, OnValidate trigger error, or any other validation issue), the field is skipped and a warning is logged on the e-document via EDocumentErrorHelper.LogWarningMessage. The finalization continues and the purchase document is created. Users can review which fields were skipped in the e-document's warning messages.

The EDocument record needed for warning logging is resolved internally from EDocumentPurchaseLine."E-Document Entry No." — no changes to the public procedure signature.

Key Changes

• EDocPurchaseHistMapping.Codeunit.al: Added [TryFunction] TryValidateFieldValue wrapping FieldRef.Validate(). On failure, captures GetLastErrorText() and logs a warning with field name, ID, value, and error details.
• EDocProcessTest.Codeunit.al: Test AdditionalFieldValueExceedingFieldLengthShouldWarn verifies that finalization succeeds, a warning (not error) is logged, and the purchase document is created despite the oversized field value.

Test plan

• Configure an additional field mapping to a Code[10] field (Location Code)
• Create an e-document draft where the additional field value exceeds 10 characters
• Finalize the draft — purchase document IS created successfully
• Warning message logged on the e-document identifies the skipped field by name and value
• Valid-length additional field values still apply correctly (existing tests pass)

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[github-actions]

AL Documentation Audit

Documentation gaps were detected in the following apps:

• E-Document-Core-Tests: 0% documentation coverage
• E-Document-Core: 0% documentation coverage

To generate documentation, run /al-docs init or /al-docs update using GitHub Copilot CLI or Claude Code.
This review is for awareness to help keep documentation in sync with code changes. It is okay to dismiss this request.