Core data failed to find the migration mapping file due to the derived attribute.

App & System Services iCloud & Data
hamed8080 OP
Created Mar ’23
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Hi, I have found another bug if I'm not mistaken in core data. When we are using a derived attribute in our xcdatamodel file after making the mapping file there is an error:

Can't find mapping model for migration

If you are looking to reproduce the bug I made a super simple example app at my branch in the link below:

https://github.com/hamed8080/LeitnerBox/tree/fix_migration

Keep that in mind if I remove the derived attribute and afterward make a migration with a new mapping file, it works correctly!

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smialek OP
Oct ’23

Hey, we came across the same bug. Have you been able to workaround it?

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Core data failed to find the migration mapping file due to the derived attribute.
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