ios - restkit 映射嵌套数组为空(带有 json 响应的嵌套 restkit 请求)

Question

我在这里做的事情很奇怪吗？

我的类别得到下载和映射，

产品也像日志记录所说的那样被下载和映射，

但是我的产品在每个分类下都是空的，谢谢!

{
  "productsCategories" : [
    {
      "product" : [
        {
          "price" : 3.99,
          "title" : "Product A"
        },
        {
          "price" : 3.99,
          "title" : "ProductB "
        }
      ],
      "categoryTitle" : “a category“
    }
  ]
}




RKObjectMapping *productCategoryMapping = [RKObjectMapping mappingForClass:[ProductCategory class]];
[productCategoryMapping addAttributeMappingsFromDictionary:@{
                                                             @"categoryTitle": @"tit"
                                                             }];

RKObjectMapping* productMapping = [RKObjectMapping mappingForClass:[Product class] ];
[productMapping addAttributeMappingsFromDictionary:@{
                                                     @"title": @"tit",
                                                     @"price": @"prc"
                                                       }];
[productCategoryMapping addPropertyMapping:[RKRelationshipMapping relationshipMappingFromKeyPath:@"product"
                                                                                       toKeyPath:@"product"
                                                                                     withMapping:productMapping]];


RKResponseDescriptor *responseDescriptor = [RKResponseDescriptor responseDescriptorWithMapping:productCategoryMapping method:RKRequestMethodPOST pathPattern:@"productByCategory" keyPath:@"productsCategories" statusCodes:[NSIndexSet indexSetWithIndex:200]];

NSURL *url=[NSURL URLWithString:@"http://www.example.com/REST/v2/"];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];

RKObjectManager *manager = [RKObjectManager managerWithBaseURL:url];
[manager addResponseDescriptor:responseDescriptor];

NSMutableDictionary *mutableParameters = [NSMutableDictionary dictionary];
[mutableParameters setValue:@"1" forKey:@"id"];
[manager addResponseDescriptor:[RKResponseDescriptor responseDescriptorWithMapping:productCategoryMapping method:RKRequestMethodPOST pathPattern:@"productByCategory" keyPath:@"productsCategories" statusCodes:RKStatusCodeIndexSetForClass(RKStatusCodeClassSuccessful)]];

[manager postObject:request path:@"productByCategory" parameters:mutableParameters success:^(RKObjectRequestOperation *operation, RKMappingResult *result){

    self.productCategoryArr=result.array;
    [self.tblDetails reloadData];

}failure:^(RKObjectRequestOperation *operation, NSError *error) {

    RKLogError(@"Operation failed with error: %@", error);
    self.productCategoryArr=nil;

}];

日志显示正在为每个产品映射对象，但我只得到

ProductCategory: 0x7bf53510
ProductCategory: 0x7be57f00

数组和每个中的 0 个对象

Answer 1

假设您的 ProductCategory 类有

NSArray *Product
NSString * tit

创建一个顶层 RKObjectMapping，例如，

RKObjectMapping * ProductCategoryResponseMapping = [RKObjectMapping mappingForClass:  [ProductCategoryResponse class]];

[ProductCategoryResponseMapping addAttributeMappingsFromDictionary:@{
                                                         @"productsCategories": @"productsCategories"
                                                         }];

并创建应该有的新类 ProductCategoryResponse

NSArray * productsCategories

将 ProductCategoryResponseMapping 用于响应描述符。

现在您的响应将包含一系列 productsCategories，每个包含一系列 Products 和 String tit。