使用Rails 3.1进行RestKit映射

Question

在Rails 3.0.8中,json包含一个带有模型名称的根元素.例如我的位置模型.

[
{
location: {
city: San Diego
name: Mission Valley YMCA Krause Family Skatepark
pads_required: 0
country: United States

并且映射提供程序直接查找位置对象.

RKObjectMapping* locationMapping = [RKObjectMapping mappingForClass:[RKLocation class]];   
[locationMapping mapKeyPath:@"id" toAttribute:@"locationId"];
...
[objectManager.mappingProvider setMapping:locationMapping forKeyPath:@"location"];

现在当你升级到rails 3.1.0时,根节点"location"现在默认被删除了,我不知道如何在没有它的情况下配置映射提供程序？我尝试了nil并寻找替代方法,但没有成功.

你知道如何映射吗？请帮忙!

[
{
   city: San Diego
   name: Mission Valley YMCA Krause Family Skatepark
   pads_required: 0
   country: United States

Answer 1

从RestKit方面来说,我不知道,但从这个主题看起来你可以让json回到RestKit期望做的事情:

class Location < ActiveRecord::Base
  self.include_root_in_json = true
end

编辑:为了完整性,以下是使用RestKit的方法:

RKObjectMapping* locationMapping = [RKObjectMapping mappingForClass:[RKLocation class]];   
[locationMapping mapKeyPath:@"id" toAttribute:@"locationId"];
...
[objectManager.mappingProvider addObjectMapping:locationMapping];

然后再调用mapper:

RKObjectMapping* locationMapping = [[RKObjectManager sharedManager].mappingProvider objectMappingForClass:[RKLocation class]];
[[RKObjectManager sharedManager] loadObjectsAtResourcePath:@"/locations" objectMapping:locationMapping delegate:self];

然后你将处理RKObjectLoader委托方法中的对象.