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ioscore-datacompilationcore-data-migrationbuild-error

Xcode cdtool can not compile issue

I added version to my DataModel and got "cdtool can not compile".

Did anyone experience similar problem? and what is "cdtool" ?

Solution

  • The problem was that I my data model contains many-to-many relationship without the inverse of it.

    From Apple documentation:

    You must define many-to-many relationships in both directions—that is, you must specify two relationships, each being the inverse of the other. You can’t just define a to-many relationship in one direction and try to use it as a many-to-many. If you do, you will end up with referential integrity problems.