BaseModel Model -> SQLite statement using property inspection

BaseModel.h

#import <Foundation/Foundation.h>
#import <Mantle.h>
#import <FTGPropertyMaestro.h>

@interface BaseModel : MTLModel <MTLJSONSerializing>

@property (nonatomic) int64_t modelID;
@property (nonatomic) NSTimeInterval CreatedUtc;
@property (nonatomic) NSTimeInterval ModifiedUtc;
@property (nonatomic) BOOL IsDeleted;

+ (NSString *)className;
+ (NSArray<FTGProperty *> *)properties;

@end

BaseModel.m

#import "BaseModel.h"
#import <ObjectiveSugar.h>
#import "DateFormatterManager.h"

@implementation BaseModel

+ (NSDictionary *)JSONKeyPathsByPropertyKey {
    return @{@"modelID": @"Id",
             @"CreatedUtc": @"CreatedUtc",
             @"ModifiedUtc": @"ModifiedUtc",
             @"IsDeleted": @"IsDeleted",
             };
}

+ (NSValueTransformer *)CreatedUtcJSONTransformer {
    return [MTLValueTransformer
            transformerUsingForwardBlock:^id(NSString *string, BOOL *success, NSError *__autoreleasing *error) {
                return @([[DateFormatterManager sharedManager] timestampFromString:string]);
            }];
}

+ (NSValueTransformer *)ModifiedUtcJSONTransformer {
    return [MTLValueTransformer
            transformerUsingForwardBlock:^id(NSString *string, BOOL *success, NSError *__autoreleasing *error) {
                return @([[DateFormatterManager sharedManager] timestampFromString:string]);
            }];
}

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

+ (NSString *)className {
    return NSStringFromClass(self);
}

#pragma mark - Properties
+ (NSArray<FTGProperty *> *)properties {
    NSMutableArray *properties = [NSMutableArray array];

    // XPBaseModel is the superclass, it has id, createdUtc, modifiedUtc
    [properties addObjectsFromArray:[FTGPropertyMaestro propertiesForClass:[self superclass]]];
    [properties addObjectsFromArray:[FTGPropertyMaestro propertiesForClass:self]];

    // Only interested in our declared properties
    NSArray *keys = [self JSONKeyPathsByPropertyKey].allKeys;

    return [properties select:^BOOL(FTGProperty *property) {
        return [keys containsObject:property.name];
    }];
}

@end