iphone - ios/core data - saving entity for a specific entity object -

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i got qeustion core data , rules of relationships.

i have entitie multiple users. users have optional one-to-many relationship entitie called event. on app start create user (i self) , other users , save them in cd. object of user i m, hold in nsuserdefaults.

so, created event , want assign userobject entitie saved in core data. thought use user object saved in userdefaults , add event it, here:

event *event = (event *)[nsentitydescription insertnewobjectforentityforname:@"event" inmanagedobjectcontext:managedobjectcontext]; //property setters event.createdby = userobjectfromnsuserdefaults;

is right way? assign event specific user (in example me) ?

another qeustion is:

my event class (subclass of nsmanagedobject) has nsset property add , remove methods add/remove invitedusers or acceptedusers event. how use methods right?

any gets cookie :=)

about first question - yes, thats way make relationships in core data. assign specific object (nsmanagmentobject, yes?) property.

the other way day that, if it's 1 many, 

[userobjectfromnsuserdefaults addevent:event];

again, if management object.

the problem see here, save in nsuserdefualts. means when load there, not attached moc, , guess won't work. need save id or in nsuserdefaults, not object itself. when app loads, fetch object db using id.


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