`migrate-content snapshot` does not handle linked items that don’t exist in source environments

[bwlng]

Brief bug description

When a content item contains a reference to another item that does not exist in the source environment, content snapshots fail.

The snapshot fails due to the error thrown in getMigrationElementToStore from migration-toolkit: https://github.com/kontent-ai/migration-toolkit/blob/d02256b3e1a4f437579a0e24c441e7c908b5578d/lib/export/export-manager.ts#L146-L160

Repro steps

1. Via migration, create a content item with a value in a linked item field that does not exist
2. Run migrate-content snapshot
3. Snapshot creation fails when mapping items and assets

Failed to map value of element 'references' of type 'modular_content'. Value: [{"id":"71c3e029-2b14-5515-a8a5-d1b703fbbb15"}]. Message: Missing item with id '71c3e029-2b14-5515-a8a5-d1b703fbbb15'

Expected behavior

The sync tool should maintain the broken reference that is in the source environment and log

Screenshots

[IvanKiral]

Hi there 👋, sorry for the late response.

Thanks for reporting this! This is more of an issue for https://github.com/kontent-ai/migration-toolkit. In the meantime, you could try normalizing your source data (removing deleted items' references) before export to keep everything consistent. We’re also considering adding something like a “skipUnusedItems” option to cover your use case.