Fix save() OperationFailure with use_revision=True and keep_nulls=False#1281
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CAPITAINMARVEL merged 2 commits intomainfrom Mar 1, 2026
Merged
Fix save() OperationFailure with use_revision=True and keep_nulls=False#1281CAPITAINMARVEL merged 2 commits intomainfrom
CAPITAINMARVEL merged 2 commits intomainfrom
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…ionFailure When both settings are enabled, revision_id (initially None on new documents) appears in both \ (from SetRevisionId) and \ (from get_top_level_nones), causing MongoDB to reject the update. Fix: exclude revision_id from get_top_level_nones when use_revision is enabled — revision_id is managed independently by SetRevisionId in the update pipeline. Also ensure get_dict respects the exclude parameter by subtracting excluded fields from the include set. Fixes #958
staticxterm
previously approved these changes
Feb 19, 2026
CAPITAINMARVEL
requested changes
Feb 28, 2026
staticxterm
approved these changes
Feb 28, 2026
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Problem
When a Document has both use_revision=True and keep_nulls=False, calling save() on a new document raises OperationFailure because revision_id (initially None) ends up in both the update pipeline's set and unset operators.
MongoDB rejects updates where the same path appears in both operators.
Fix
Both save() and save_changes() call get_top_level_nones(), so the fix covers both code paths.
Tests
Fixes #958