NSManagedObject <-> NSDictionary (e.g. JSON Model class)

Converting NSManagedObject to NSDictionary (and back again).

Installation

pod 'ManagedMappingObject'

Usage

1 Setup NSManagedObject class.

You can easily generate using mogenerator.

mogenerator -m ManagedMappingObject.xcdatamodeld -O CoreDataModels \
    --base-class ManagedMappingObject \
    --template-var arc=true

• Target NSManagedObject class must be subclass of ManagedMappingObject.
• Target NSManagedObject class must implement <ManagedMappingProtocol> .

2 Create NSValueTransformer subclass if need betransformed value.

• UnitTransformer in example case.
• implement + (NSDictionary *)JSONValueTransformerNames of <ManagedMappingProtocol>.

e.g.)

+ (NSDictionary *)JSONKeyMap {
    return @{
        UnitAttributes.identifier : @"id",
        UnitAttributes.date : @"unix_time",
        UnitAttributes.centimeter : @"meter"
    };
}

+ (NSDictionary *)JSONValueTransformerNames {
    return @{
        UnitAttributes.centimeter : NSStringFromClass([MeterToCentimeterTransformer class]),
        UnitAttributes.date : NSStringFromClass([UnixTimeToNSDateTransformer class])
    };
}

+ (NSString *)entityName {
    return [super entityName];
}

3 You can use following method in NSManagedObject, after setup.

// NSDictionary -> NSManagedObject
+ (instancetype)insertNewWithDictionary:(NSDictionary *) dictionary managedObjectContext:(NSManagedObjectContext *) context;
// update NSManagedObject
- (void)updateWithDictionary:(NSDictionary *) dictionary;
// NSManagedObject -> NSDictionary
- (NSDictionary *)dictionaryRepresentation;

NOTE: These methods ignore nil.

Example

See Example and Tests for details on.

Bonus : NSDictionary Model

Raw NSDictionary is difficult to deal with, so this example project use JSON Accelerator.

fooJSONModel class has following useful methods :

- (instancetype)initWithDictionary:(NSDictionary *)dict;
- (NSDictionary *)dictionaryRepresentation;

Contributing

1. Fork it!
2. Create your feature branch: git checkout -b my-new-feature
3. Commit your changes: git commit -am 'Add some feature'
4. Push to the branch: git push origin my-new-feature
5. Submit a pull request :D

License

MIT

Acknowledgment

Thanks @ishkawa

• MantleのようなノリでJSON>NSManagedObjectを楽にしたかった