Cast a NSManagedObject to it's class instance

Question

I am getting stuck, and this makes me crazy. I have a function that returns a NSManagedObject:

let getaccount = AccountModel.getFirst(globals.managedObjectContext)

and I have to cast it into its generated representation Account

I'll do this:

dump("--------------------")
dump(getaccount)
dump("--------------------")
if let acc = getaccount as? Account {
    print("OK")
} else {
    print("not convertable ")
}
dump("*********************")

And the output FROM MY UNITTEST looks like this:

- --------------------
▿ Ticketstream.Account
  ▿ Some: Coredataexampleapp.Account #0
    ▿ super: <Coredataexampleapp.Account: 0x138d85f90> (entity: Account; id: 0x1398a9fe0 <x-coredata://06F96EF3-96A6-4C32-A6A2-F16BCB8318EA/Account/p1> ; data: {
    active = 0;
    avatar =     (
    );
    config =     (
    );
    createdAt = "2015-07-31 23:34:58 +0000";
    displayName = "My Account (1)";
    host = localhost;
    lastUpdatedDate = "2015-07-31 23:34:58 +0000";
    password = nil;
    port = 8080;
    schema = HTTPS;
    username = "";
})
      - NSObject: <Coredataexampleapp.Account: 0x138d85f90> (entity: Account; id: 0x1398a9fe0 <x-coredata://06F96EF3-96A6-4C32-A6A2-F16BCB8318EA/Account/p1> ; data: {
    active = 0;
    avatar =     (
    );
    config =     (
    );
    createdAt = "2015-07-31 23:34:58 +0000";
    displayName = "My Account (1)";
    host = localhost;
    lastUpdatedDate = "2015-07-31 23:34:58 +0000";
    password = nil;
    port = 8080;
    schema = HTTPS;
    username = "";
})
- --------------------
not convertable 
- *********************

How to cast a NSManagedObject into Account?

I need this, because I can't get the first Account otherwise than:

class func getFirst(context: NSManagedObjectContext) -> NSManagedObject? {
    let request = NSFetchRequest(entityName: accountEntityName)
    request.fetchLimit = 1
    let list: NSArray = try! context.executeFetchRequest(request)
    return list.firstObject as? NSManagedObject
}

I've tried this with NSManagedObject, AnyObject and Account... How do i get the first Account the right way?

UPDATE: In normal running mode: all is fine! I'll get:

- --------------------
OK
- *********************

But not from my tests :-(

Thanks for your help, I am lost.

Isn't the problem that the managed object model belongs to the app target, not to the test target? — matt, Jul 31 '15 at 23:57
@PeterShaw: This thread http://stackoverflow.com/questions/25076276/unable-to-find-specific-subclass-of-nsmanagedobject has some answers related to unit testing (e.g. mark the managed object subclass with `@objc(EntityName)`. — Martin R, Aug 01 '15 at 07:21
After i add @obj(Account) to class Account: NSMangagedObject, i get a CoreData warning: Unable to load class named 'Coredataexampleapp .Account' for entity 'Account'. — Peter Shaw, Aug 01 '15 at 11:31

score 0 · Answer 1 · answered Jul 31 '15 at 23:57

0

Select all your project files in turn and look at the File Inspector at right. Make sure all files have the 'Test' project checked in their Target Memberships.

answered Jul 31 '15 at 23:57

BaseZen

8,650
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All files belongs to the main target and the test target! Even all Entities belongs to the Test target, too – Peter Shaw Aug 01 '15 at 00:03
Hm! I'd be curious if any differences could be gleaned from lldb at a breakpoint in both cases. Maybe include the `po` on `getobject` in your question. – BaseZen Aug 01 '15 at 00:10

score 0 · Answer 2 · edited May 23 '17 at 11:51

0

There is no need to include all the normal class files in the test target. You just have to import the main module, and everything works as expected.

@testable import AppName

This is inserted automatically in Xcode 7 beta 4. For the casting issue see this answer.

edited May 23 '17 at 11:51

Community

1
1

answered Aug 02 '15 at 07:59

Mundi

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Cast a NSManagedObject to it's class instance

2 Answers2