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fix(@rjsf/core): prevent extraErrors duplication on array field mutation (#5041) - #5044
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heath-freenome merged 3 commits intoApr 30, 2026
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processPendingChange() used originalErrorSchema (which already contains merged extraErrors) as the base for re-merging extraErrors in the non-live-validate branch. Because validationDataMerge concatenates __errors arrays, each array mutation triggered an extra merge cycle that appended duplicate copies of any sibling field's extraErrors. The fix uses schemaValidationErrorSchema (the un-merged AJV-only base) instead, consistent with how getDerivedStateFromProps and getStateFromProps handle the same merge pattern. Fixes rjsf-team#5041
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@JosephDoUrden Looks like your tests are failing |
Addresses review feedback. The previous patch swapped state.errorSchema for schemaValidationErrorSchema as the merge base, but that dropped the caller-supplied newErrorSchema mutations applied earlier in the same function, breaking ArrayField swap/remove/insert/copy tests. Introduce a local mergeBaseErrorSchema starting from the AJV-only schemaValidationErrorSchema and apply the path-level newErrorSchema onto a clone (or replace at root) before mergeErrors. extraErrors at sibling paths are no longer concatenated twice, and the path the user just edited still shows the error they passed in.
heath-freenome
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Apr 30, 2026
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Reasons for making this change
processPendingChange()usedthis.state.errorSchema(which already contains mergedextraErrors) as the base when re-mergingextraErrorsin the non-live-validate branch. BecausevalidationDataMergeconcatenates__errorsarrays, each array mutation triggered an extra merge cycle that appended duplicate copies of any sibling field'sextraErrors.The fix uses
schemaValidationErrorSchema(the un-merged AJV-only base) instead, which is consistent with howgetDerivedStateFromPropsandgetStateFromPropshandle the same merge pattern.Fixes #5041
Changes
Form.processPendingChange(), replacedoriginalErrorSchemawithschemaValidationErrorSchemaas the base passed tomergeErrors()in theelse if (!noValidate && newErrorSchema)branchextraErrorsmust not accumulate after array item is addedChecklist
npx nx run-many --target=build --exclude=@rjsf/docs && npm run test:updateto update snapshots, if needed.