Use a required revision ID when a Google Docs API update must apply only to the document state your application read. This helps prevent stale index-based edits from silently targeting a newer collaborator version.
Guard the state-dependent batch
- Read the document and its revision ID.
- Prepare edits against that exact content and tab structure.
- Include
writeControl.requiredRevisionIdin the batchUpdate request. - Inspect the response and reread the affected content.
Google documents a 400 bad-request response when the required revision is no longer the latest. Treat that as a reason to reassess the edit plan, not as permission to remove the guard and replay stale offsets.
Distinguish required and target revisions
targetRevisionId uses a different collaboration model in which the server incorporates changes against a recent revision. It is not interchangeable with a strict required-revision check, and the two fields are mutually exclusive.
Choose the behavior according to the application’s actual requirements. An exact-position correction often needs a fresh read and deliberate recomputation after a conflict.
Verify outcomes before retrying
Batch subrequests are validated and applied atomically for valid batches, but a network interruption can still leave the client uncertain about the outcome. Reconcile the current document before replaying a non-idempotent insertion or deletion.
Check the actual text, formatting, and revision after a successful response. A revision guard protects a state assumption; it does not prove the editorial change was correct. Test conflict handling on controlled sample documents and avoid logging confidential content unnecessarily while retaining enough identifiers and outcomes to diagnose the operation.
References
- Method: documents.batchUpdate | Google Docs | Google for Developers
- Batch requests | Google Docs | Google for Developers
- Structure of a Google Docs document | Google for Developers
Reviewed against the linked official product guidance on November 3, 2026. Features, limits, screen labels, and access can vary by account, platform, region, and organization policy.