Mantle convert 0 and 1 to BOOL automatically?

Question

Does Mantle already converts int values 0 and 1 in JSON to objective-C BOOL values?

I have a model:

@interface MyModel : MTLModel

@property (nonatomic, readonly) BOOL isValid;

@end

And lets say JSON is:

{ is_valid: 0 } OR { is_valid: 1 }

I want to know if Mantle would automatically convert is_valid into Objective-C BOOL value to do I have to explicity mention the following:

+ (NSValueTransformer)isValidJSONTransfermer {
    return [NSValueTransformer mtl_valueMappingTransformerWithDictionary:@{@(0) : @(NO),
                                                                           @(1) : @(YES)}];
}

Does it automatically converts `boolean` into BOOL? I can most probably get API changed. — nefarianblack, Jul 10 '14 at 07:46

score 6 · Accepted Answer · answered Jul 10 '14 at 12:53

Yes, this is handled for you; you don't need to use the mapping transformer.

Mantle internally calls setValue:forKey: to set the value. The 0 or 1 will be an NSNumber, and setValue:forKey: will use the boolValue on NSNumber to get a value, as your property is declared as a BOOL.

This behaviour of Key-Value Coding is described under Scalar and Structure Support.

score 2 · Answer 2 · edited Jun 11 '16 at 07:27

2

If you need to convert a string to boolean use this transformer:

+ (NSValueTransformer *)sectionJSONTransformer {
    return [NSValueTransformer mtl_valueMappingTransformerWithDictionary:@{@"0" : @(NO),
                                                                           @"1" : @(YES)}];
}

edited Jun 11 '16 at 07:27

Stunner

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answered Apr 21 '16 at 15:26

solven

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score 1 · Answer 3 · edited May 16 '16 at 08:40

1

+ (NSValueTransformer *)awesomeJSONTransformer {
    return [NSValueTransformer valueTransformerForName: MTLBooleanValueTransformerName];
}

edited May 16 '16 at 08:40

DanielBarbarian

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answered May 16 '16 at 08:33

G.daogeng

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Add some explanation with answer for how this answer help OP in fixing current issue – ρяσѕρєя K May 16 '16 at 08:50

Mantle convert 0 and 1 to BOOL automatically?

3 Answers3

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