How to get Processed string from string in Core Data

Question

In my application I have used core data for data persistent.

I have one entity "Networks"

Networks entity have one attribute ip address.

Many times ip address is not in well format . Can I transform one raw ip string to other well form string i.e can I process core data entity attribute value using heavy core data migration like custom Entity Migration Policies .

When to go for Custom Entity Migration Policies

Answer 1

When is a migration necessary? The easiest answer to this common question is “when you need to make changes to the data model.”

You need to opt for Custom Entity Migration only when you have changed the entity type of your attribute.

You can get more information about this topic in here : https://www.raywenderlich.com/174025/lightweight-migrations-in-core-data-tutorial