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copied!<p>The restkit does not fund routable path for NSArray, because you defined your routing for <code>NSManagedObject</code> class. You probably want to create a custom class, say <code>MySyncEntity</code> that holds the ivars you define in your mapping. Then, you create your mapping like this:</p> <pre><code>RKObjectMapping* mapping = [RKObjectMapping mappingForClass:[MySyncEntity class]]; .... [myManager setSerializationMIMEType:RKMIMETypeJSON]; [[myManager router] routeClass:[MySyncEntity class] toResourcePath:@"/sync"]; </code></pre> <p>then you should be able to post your object to the API backend as JSON object.</p> <p><strong>Further clarification:</strong></p> <p>In this case, we want to post an array of <code>NSManagedObject</code> instances into a JSON based API. To do that we need to create a sync entity, that holds the objects in an array:</p> <pre><code>@interface MySyncEntity : NSObject {} @property (nonatomic, retain) NSArray* mySyncArray; ... @end </code></pre> <p>The <code>mySyncArray</code> will hold the payload we'd like to submit to the rest backend. Then, we create appropriate mapping for both <code>NSManagedObject</code> that will be sent in <code>mySyncArray</code> and the <code>MySyncEntity</code> entity itself.</p> <pre><code>RKObjectManager *manager = [RKObjectManager objectManagerWithBaseURL:kBaseUrl]; ... RKObjectMapping *mngObjMapping = [RKObjectMapping mappingForClass:[NSManagedObject class]]; [mngObjMapping mapKeyPath: @"time" toAttribute:@"time"]; [mngObjMapping mapKeyPath: @"recordLevel" toAttribute:@"recordLevel"]; .... //map as many properties as you wish [[manager mappingProvider] setSerializationMapping:[mngObjMapping inverseMapping] forClass:[NSManagedObject class]]; //now, we create mapping for the MySyncEntity RKObjectMapping *syncEntityMapping = [RKObjectMapping mappingForClass:[MySyncEntity class]]; [syncEntityMapping mapKeyPath:@"mySyncArray" toRelationship:@"mySyncArray" withMapping:mngObjMapping]; [[manager mappingProvider] setSerializationMapping:[syncEntityMapping inverseMapping] forClass:[MySyncEntity class]]; </code></pre> <p>Now with the mappings defined we can post the object to the server </p> <pre><code>[manager postObject:mySyncInstance delegate:nil]; </code></pre> <p>The contents of <code>mySyncInstance</code> array will be mapped according to <code>mngObjMapping</code> and sent to defined rest endpoint.</p>

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