Importing Data using MagicalRecord

Question

I'm using MagicalRecord to import data from plist. I'm using code less import as explained in this tutorial Importing Data Made Easy.

I have two entities Manufacturer and Car, they have one to many and one to one relation respectively.

Plist structure

This import work fine

NSArray *manufacturers = ...

[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
        [manufacturers enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
            [Manufacturer MR_importFromObject:obj inContext:localContext];
        }];
    } completion:^(BOOL success, NSError *error) {

}];

But this is not getting imported

[MagicalRecord saveWithBlock:^(NSManagedObjectContext *localContext) {
        [Manufacturer MR_importFromArray:manufacturers inContext:localContext];
    } completion:^(BOOL success, NSError *error) {

}];

Any explanation would be highly appreciated.

EDIT : Log of manufacturers array

[
    {
        "Cars": [
            {
                "CarID": 1,
                "Name": "Civic"
            },
            {
                "CarID": 2,
                "Name": "Jazz"
            },
            {
                "CarID": 3,
                "Name": "City"
            }
        ],
        "ManufacturerID": 1,
        "Name": "Honda"
    }
]

Answer 1

The issue seems to be like a bug in MagicalRecord, found an open bug filed for this issue.

MR_importFromArray: was using MR_saveWithBlock: replacing with saveWithBlockAndWait: solves the issue. Bug Fix