Issue Summary

CCMA prechecks do not report user mapping issues.

Steps to Reproduce

1. Create a migration through the server CCMA plugin
2. Run pre-checks
3. Start migration

Expected Results

Warning if there is a missing user in the user_mapping

Actual Results

The below exception is thrown in the UI:

Import to cloud failed. Message: ERROR: insert or update on table "label" violates foreign key constraint
"fk_label_owner" Detail: Key (owner)=(*******************************) is not present in table "user_mapping".

during the migration when there is not a user present.  This is not caught by the pre-flight checks.

Workaround

After a migration is attempted and failed, the error gives the information needed to update the tables.

Update the owner property of the space entry.

update SPACES set CREATOR='*******************************' where SPACEKEY='[*]';

Then remigrate the space.