Half an import

An import reports failure when one row is invalid, yet records before that row remain visible and retries create duplicates.

Initial failing signalfailed batch mutates the storeExpected behavior: A failed batch leaves the store unchanged. · actual behavior: A failed batch leaves one row committed.

Progress

1Reproduce the bugRun checks

2Edit the fixOpen

3Pass checksOpen

4Submit fixOpen

Reproduction Steps

Run npm test.
Inspect store contents after the validation error.
Trace validation and mutation order for every row in the batch.
Keep failed imports atomic without changing successful imports.

Focus Mode

Start

src/importBatch.js

Likely area

src/importBatch.js

Challenge Coach

Hints reveal broad direction first, then narrow toward the suspect path without showing hidden tests or exact solution code.

TopicData Integrity

DifficultyHard

Est. time24 min

Workspacepreparing

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Evidence Map

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workspace

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