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re: Core Data: relationship 'too large' when saving
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re: Core Data: relationship 'too large' when saving


  • Subject: re: Core Data: relationship 'too large' when saving
  • From: Ben Trumbull <email@hidden>
  • Date: Thu, 24 Sep 2009 22:47:50 -0700

I am encountering an error that I have not seen before.

While saving in a NSManagedObjectContext I am encountering an error
that reports a to-many relationship as 'too large'.
This relationship has ~10,000 members but each member is relatively
simple consisting of a few short strings and numbers.
I have no problems operating on this relation; the error only occurs
while saving.
Many GB of disk space are available. Error occurs independent of store
type, SQLite, binary, or xml.
Smaller (different) relations of ~1000 members are correctly saved.

1) Is this really a size problem?

No. I suppose it's possible there's a 16 bit overflow bug somewhere, but there shouldn't be (obviously), and I can't imagine any issue with 10,000. It is possible for you to set the maximum size of a to-many relationship in your model. Did you check the property validation rules for this relationship ?


2) can someone point me to relevant documentation?

You sure it's not NSValidationNumberTooLargeError for one of the numbers being outside the range you specified acceptable in the model ?


- Ben



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