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Editorial Team
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Asked: 2026-06-09T05:43:21+00:00

I am trying to load objects synchronously with RestKit and to do that I

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I am trying to load objects synchronously with RestKit and to do that I am using [anObjectLoader sendSynchronously] on a background thread. Then in the RKObjectLoader didFinishLoad: the application is currently stopping at the first line: NSAssert([NSThread isMainThread], @"RKObjectLoaderDelegate callbacks must occur on the main thread");

Looking at the documentation, the sendSynchronously method from the RKRequest class says that the request will be synchronously requested and a hydrated response object will be returned.

This is a snapshot of my code:

RKObjectLoader *anObjectLoader = [self.objectManager loaderWithResourcePath:resourcePath];
NSLog(@"Response: %@", [anObjectLoader sendSynchronously]);

On console:

*** Assertion failure in -[RKManagedObjectLoader didFinishLoad:], ...RestKit/Code/ObjectMapping/RKObjectLoader.m:423

Is it Ok to use RestKit with synchronous calls?
Are there better ways to send synchronous requests?
Am I missing something?

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1 Answer

  1. Editorial Team

    You should never make synchronous calls. Use the send method and catch the response using either delegates or block callbacks. Among other things, this method is optimized for network bandwidth usage and also handles threading correctly.

    As an aside, the reason RKObjectLoader requires the main thread is because that is where your main object context is.

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