Objective c 序列化RestKit（Rails后端）中的嵌套映像

以下是我得到的：

    food_name_token Pizza
    id  1
    category_id 1
    review  {"note"=>"tasty!", "image"=>"<RKParamsAttachment: 0x7834500>"}

我正在使用Restkit，我正在尝试在Iphone上序列化我的数据，并将其发送到Rails后端。在大多数情况下，它是有效的，但我似乎无法让我的多部分图像序列化

该图像属于“Review”类，而该类又嵌套在“Dish”类中。以下是我到目前为止的情况：

// Set up routes
    RKObjectManager* manager = [RKObjectManager objectManagerWithBaseURL:@"http://postbin.org"];
    [manager.router routeClass:[Dish class] toResourcePath:@"/5a850fe1" forMethod:RKRequestMethodPOST];  
    [manager.router routeClass:[Review class] toResourcePath:@"/5a850fe1" forMethod:RKRequestMethodPOST]; 

// Map Dish Object
    RKObjectMapping *dishMapping = [RKObjectMapping mappingForClass:[NSMutableDictionary class]];
    [dishMapping mapKeyPath:@"id" toAttribute:@"identifier"];
    [dishMapping mapKeyPath:@"category_id" toAttribute:@"categoryID"];
    [dishMapping mapKeyPath:@"food_name_token" toAttribute:@"name"];

// Map Review Object
    RKObjectMapping *reviewMapping = [RKObjectMapping mappingForClass:[Review class]];
    [reviewMapping mapKeyPath:@"note" toAttribute:@"note"];
    [reviewMapping mapKeyPath:@"image" toAttribute:@"image"];

// Define the relationship mapping
    [dishMapping mapKeyPath:@"review" toRelationship:@"review" withMapping:reviewMapping];

// Set serialization for Dish Class
    RKObjectMapping* dishSerializationMapping = [dishMapping inverseMapping];
    [[RKObjectManager sharedManager].mappingProvider setSerializationMapping:dishSerializationMapping forClass:[Dish class] ]; 

// Set serialization for Review Class 
    RKObjectMapping* reviewSerializationMapping = [reviewMapping inverseMapping];
    [[RKObjectManager sharedManager].mappingProvider setSerializationMapping:reviewSerializationMapping forClass:[Review class] ]; 

然后我分配值：

    [Dish sharedDish].name = @"Pizza";
    [Dish sharedDish].identifier = [NSNumber numberWithInt:1]; 
    [Dish sharedDish].categoryID = [NSNumber numberWithInt:1];

    [Review sharedReview].note = @"tasty!";

// Turn an image into an RKParamsAttachment object and assign it to the image attribute of the Review class
    RKParams* params = [RKParams params];
    UIImage* imageOrig = [UIImage imageNamed:@"pizza.jpg"];
    NSData* imageData = UIImagePNGRepresentation(imageOrig);
    RKParamsAttachment* image = [params setData:imageData MIMEType:@"image/png" forParam:@"image"];
    [params release];

    [Review sharedReview].image = image;

然后我将我的审阅对象指定给我的Dish对象的审阅属性，并将其发送：

    [Dish sharedDish].review = [Review sharedReview];  
    [[RKObjectManager sharedManager] postObject:[Dish sharedDish] delegate:self];

看起来我把图像附加到对象上的方式不对

---

正确的方法是什么？

是否尝试手动将嵌套添加到参数名称：

RKParamsAttachment* image = [params setData:imageData 
    MIMEType:@"image/png" forParam:@"review[image]"];

---

看来你删除了你以前的答案。我认为您以不受支持的方式使用RKParamsAttachment。RestKit RKCatalog示例项目中有一个RKParamsAttachment示例。你试过了吗？是的，我引用了那个例子。问题是我不知道如何正确使用这一行：

[params setData:imageData MIMEType:@“image/png”forParam:@“image”]

我需要将类似

{review=>image}

的内容分配给'forParam'参数，而不仅仅是

@“image”

，因为image属性属于嵌套在'Dish'对象中的'review'对象。但我要发布的是“Dish”对象。您知道'forParam'参数是否可以接受超过一级深度的密钥吗？这可能会解决问题。。。

RKParamsAttachment* image = [params setData:imageData 
    MIMEType:@"image/png" forParam:@"review[image]"];