fix(@aws-amplify/datastore): handle sync query unauthorized #7926
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This was referenced Mar 13, 2021
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This was referenced Mar 15, 2021
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Fixes a bug where the sync engine breaks when a sync query returns an
unauthorizederror.The expected behavior for DataStore is that an unauthorized error on a model should not break syncing for other models.
Currently, when a sync query request returns unauthorized, we get the following unhandled error
on this line.
An unauthorized query response typically won't return any
items, so this PR adds a check to see ifitemsare defined before attempting to iterate over them. If not defined, we return an empty list (items: []) andnextToken: nullto signal to theretrievePagemethod that it shouldn't attempt to retrieve additional pages via this query.By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.