JSON 経由でオブジェクトを Rails サーバーに投稿するために Restkit 0.20 (初めて) を使用しました。写真とアイテムの2つのオブジェクトを手に入れました。
Picture
{
"base64" : null,
"id" : 1,
"created_at" : "2013-08-28T15:08:49Z",
"user_nickname" : "user_name",
"tag" : "ALPHA",
"nbitems" : null,
"path" : {
"url" : "https://www.mywebsite/pictures/1/default.jpg"
},
"updated_at" : "2013-08-28T15:08:49Z",
"user_id" : 1
}
Item
{
"base64" : null,
"picture_id" : 1,
"id" : 1,
"created_at" : "2013-08-28T15:10:54Z",
"itemurl" : {
"url" : "https://www.mywebsite/pictures/1/item1.png"
},
"nickname" : "",
"user_id" : 1,
"updated_at" : "2013-08-28T15:10:54Z"
}
これが AppDelegate.m での私のマッピングです
//Mapping users
RKEntityMapping *userMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([User class]) inManagedObjectStore:manager.managedObjectStore];
[userMapping addAttributeMappingsFromDictionary:@{
@"id" : @"user_id",
@"email" : @"email",
@"nickname" : @"nickname",
@"created_at" : @"createdAt"
}];
userMapping.identificationAttributes = @[ @"user_id" ];
//Mapping paths
RKEntityMapping *pathMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([Path class]) inManagedObjectStore:manager.managedObjectStore];
[pathMapping addAttributeMappingsFromDictionary:@{
@"url" : @"url"
}];
//Mapping itemURL
RKEntityMapping *itemURLMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([ItemURL class]) inManagedObjectStore:manager.managedObjectStore];
[pathMapping addAttributeMappingsFromDictionary:@{
@"url" : @"url"
}];
//Mapping pictures
RKEntityMapping *pictureMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([Picture class]) inManagedObjectStore:managedObjectStore];
[pictureMapping addAttributeMappingsFromDictionary:@{
@"id" : @"picture_id",
@"user_id" : @"user_id",
@"user_nickname" : @"user_nickname",
@"nbitems" : @"nbitems",
@"tag" : @"tag",
@"base64" : @"base64",
@"created_at" : @"createdAt"
}];
pictureMapping.identificationAttributes = @[ @"picture_id"];
[pictureMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"path" toKeyPath:@"path" withMapping:pathMapping]];
[manager addResponseDescriptorsFromArray:@[
[RKResponseDescriptor responseDescriptorWithMapping:pictureMapping
pathPattern:@"pictures"
keyPath:nil
statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]
]];
RKObjectMapping *pictureRequestMapping = [RKObjectMapping requestMapping];
[pictureRequestMapping addAttributeMappingsFromArray:@[@"user_id", @"user_nickname", @"tag", @"base64", @"path"]];
RKRequestDescriptor *pictureRequestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:pictureRequestMapping objectClass:[Picture class] rootKeyPath:@"picture" method:RKRequestMethodAny];
[manager addRequestDescriptor:pictureRequestDescriptor];
//Mapping items
RKEntityMapping *itemMapping = [RKEntityMapping mappingForEntityForName:NSStringFromClass([Item class]) inManagedObjectStore:managedObjectStore];
itemMapping.identificationAttributes = @[ @"item_id"];
[itemMapping addAttributeMappingsFromDictionary:@{
@"id" : @"item_id",
@"picture_id" : @"picture_id",
@"user_id" : @"user_id",
@"nickname" : @"nickname",
@"base64" : @"base64",
@"created_at" : @"createdAt"
}];
RKRelationshipMapping *itemURLRelation = [RKRelationshipMapping relationshipMappingFromKeyPath:@"itemurl" toKeyPath:@"itemurl" withMapping:itemURLMapping];
[itemMapping addPropertyMapping:itemURLRelation];
RKResponseDescriptor *itemDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:itemMapping
pathPattern:@"items"
keyPath:nil
statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)];
[manager addResponseDescriptor:itemDescriptor];
RKObjectMapping *itemRequestMapping = [RKObjectMapping requestMapping];
[itemRequestMapping addAttributeMappingsFromArray:@[@"picture_id", @"user_id", @"nickname", @"base64", @"itemurl"]];
RKRequestDescriptor *itemRequestDescriptor = [RKRequestDescriptor requestDescriptorWithMapping:itemRequestMapping objectClass:[Item class] rootKeyPath:@"item" method:RKRequestMethodAny];
[manager addRequestDescriptor:itemRequestDescriptor];
ViewController に Picture インスタンスを投稿すると、完全に機能します
- (void)uploadPicture:(UIImage *)chosenImage{
NSManagedObjectContext *moc = [RKManagedObjectStore defaultStore].mainQueueManagedObjectContext;
UIImage *resizedImage = [self scaleImage:chosenImage maxWidth:640 maxHeight:960];
NSString *imageEncoded = [self image2jpg2String:resizedImage];
Picture *picture = [Picture insertInManagedObjectContext:moc];
picture.user_id = userId;
picture.user_nickname = @"user_nickname";
picture.tag = @"ALPHA";
picture.base64 = imageEncoded;
[[RKObjectManager sharedManager] postObject:picture path:@"pictures" parameters:nil success:nil failure:^(RKObjectRequestOperation *operation, NSError *error) { NSLog(@"Error: %@",error);}];
}
別のコントローラーの Item インスタンスで同じことをしようとしています
- (void)uploadItem{
NSManagedObjectContext *mocFVC = [RKManagedObjectStore defaultStore].mainQueueManagedObjectContext;
NSNumber *userId = [NSNumber numberWithInt:1];
UIImage *itemImage = self.itemImage.image;
UIImage *resizedItem = [self scaleImage:itemImage maxWidth:640 maxHeight:960];
NSString *itemEncoded = [self image2png2String:resizedItem];
Item *item = [Item insertInManagedObjectContext:mocFVC];
item.user_id = userId;
item.nickname = @"user_nickname";
item.picture_id = pictureToDisplay.picture_id;
item.base64 = itemEncoded;
[[RKObjectManager sharedManager] postObject:item path:@"items" parameters:nil success:nil failure:^(RKObjectRequestOperation *operation, NSError *error) { NSLog(@"Error: %@",error);}];
}
しかし、item.base64 をコメントしない限り、xcode は常に次のエラーを返します。
2013-08-28 22:51:41.116 MYPROJECT[4588:1603] E restkit.network:RKObjectRequestOperation.m:243 POST 'http://www.mywebsite/items' (422 Unprocessable Entity / 0 objects) [request=0.6791s mapping=0.0000s total=0.7111s]: Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "No mappable object representations were found at the key paths searched."
UserInfo=0x1e8af330 {DetailedErrors=(), NSLocalizedFailureReason=The mapping operation was unable to find any nested object representations at the key paths searched: error
The representation inputted to the mapper was found to contain nested object representations at the following key paths: itemurl
This likely indicates that you have misconfigured the key paths for your mappings., NSLocalizedDescription=No mappable object representations were found at the key paths searched., keyPath=null}
2013-08-28 22:51:41.119 MYPROJECT[4588:907] Error: Error Domain=org.restkit.RestKit.ErrorDomain Code=1001 "No mappable object representations were found at the key paths searched." UserInfo=0x1e8af330 {DetailedErrors=(), NSLocalizedFailureReason=The mapping operation was unable to find any nested object representations at the key paths searched: error
The representation inputted to the mapper was found to contain nested object representations at the following key paths: itemurl
This likely indicates that you have misconfigured the key paths for your mappings., NSLocalizedDescription=No mappable object representations were found at the key paths searched., keyPath=null}
投稿する前にstackoverflowで多くの投稿をチェックし、restkitドキュメントを読みましたが、コードと画像モデルがItemクラスに使用するモデルに非常に近いため、アイテムで機能しない理由がわかりません。何か不足していますか？何か案が ？:)