core data is internally sqlite so boolean value is dealt as integer value since sqlite doesn't have boolean value. core data implementation is internally objective-c. objective-c deals with object as optional type (nil) but cannot deal with primitive as optional type.
core data is internally sqlite so boolean value is dealt as integer value since sqlite doesn't have boolean value. core data implementation is internally objective-c. objective-c deals with object as optional type (nil) but cannot deal with primitive as optional type.
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Understanding the differences between your Core Data model and managed objects
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