Realm dynamic API usage example

dynamic_realm.m

#import <Realm.h>

// extracted from RLMRealm_Dynamic.h
@interface RLMProperty (AGDynamic)
- (instancetype)initWithName:(NSString *)name
                        type:(RLMPropertyType)type
             objectClassName:(NSString *)objectClassName
                     indexed:(BOOL)indexed;
@end

@interface RLMObjectSchema (AGDynamic)
- (instancetype)initWithClassName:(NSString *)objectClassName objectClass:(Class)objectClass properties:(NSArray *)properties;
@end

@interface RLMRealm (AGDynamic)
+ (instancetype)realmWithPath:(NSString *)path
                          key:(NSData *)key
                     readOnly:(BOOL)readonly
                     inMemory:(BOOL)inMemory
                      dynamic:(BOOL)dynamic
                       schema:(RLMSchema *)customSchema
                        error:(NSError **)outError;

- (RLMResults *)allObjects:(NSString *)className;
- (RLMObject *)createObject:(NSString *)className withValue:(id)value;
@end

// extracted from RLMSchema_Private.h
@interface RLMSchema (AGDynamic)
@property (nonatomic, readwrite, copy) NSArray *objectSchema;
@end


// also see realm dynamic tests
// https://github.com/realm/realm-cocoa/blob/123f97cdb2819397e289e088558f36e365e712a7/Realm/Tests/DynamicTests.m
- (void)testDynamic {
    [RLMRealm setSchemaVersion:1 forRealmAtPath:RLMTestRealmPath() withMigrationBlock:^(RLMMigration *migration, NSUInteger oldSchemaVersion) {
    }];
    
    RLMProperty *propA = [[RLMProperty alloc] initWithName:@"uuid" type:RLMPropertyTypeString objectClassName:nil indexed:YES];
    RLMProperty *propB = [[RLMProperty alloc] initWithName:@"title" type:RLMPropertyTypeString objectClassName:nil indexed:NO];
    RLMObjectSchema *objectSchema = [[RLMObjectSchema alloc] initWithClassName:@"TrulyDynamicObject" objectClass:RLMObject.class properties:@[propA, propB]];
    RLMSchema *schema = [[RLMSchema alloc] init]; // it would be great to have RLMSchema method like +schemaWithClassName:objectClass:properties
    schema.objectSchema = @[objectSchema];
     
    RLMRealm *dyrealm = [RLMRealm realmWithPath:RLMTestRealmPath() key:nil readOnly:NO inMemory:NO dynamic:YES schema:schema error:nil];
    
    [dyrealm beginWriteTransaction];
    [dyrealm createObject:@"TrulyDynamicObject" withValue:@{@"uuid": [[NSUUID UUID] UUIDString], @"title": @"item title"}];
    [dyrealm commitWriteTransaction];
    
    RLMResults *results = [dyrealm allObjects:@"TrulyDynamicObject"];
    for (id obj in results) {
        NSLog(@"%@ %@", obj[@"uuid"], obj[@"title"]);
    }
}