使用RKEntityMapping和RKRelationshipMapping获取许多记录

我没有找到正确的映射并获取很多记录。使用RKEntityMapping和RKRelationshipMapping获取许多记录

实体只有两个属性nid（Integer 16）和body（String）。

的JSON（由Drupal的web服务，只是它的一部分创建）就像是

[{ 
"nid":[{"value":"4"}], 
"body":[{"value":"<p>test test test<\/p> \r\n","format":"basic_html","summary":""}] 
}]

和我的代码

let mapping = RKEntityMapping(forEntityForName: "Content", inManagedObjectStore: manager.managedObjectStore) 
    mapping.identificationAttributes = ["nid"] 

    let nidMapping = RKEntityMapping(forEntityForName: "Content", inManagedObjectStore: manager.managedObjectStore) 
    nidMapping.addAttributeMappingsFromDictionary([ 
     "value"  : "nid" 
     ]) 

    let bodyMapping = RKEntityMapping(forEntityForName: "Content", inManagedObjectStore: manager.managedObjectStore) 
    bodyMapping.addAttributeMappingsFromDictionary([ 
     "value"  : "body" 
     ]) 

    mapping.addPropertyMapping(RKRelationshipMapping(fromKeyPath: "nid", toKeyPath: "nid", withMapping: nidMapping)) 
    mapping.addPropertyMapping(RKRelationshipMapping(fromKeyPath: "body", toKeyPath: "body", withMapping: bodyMapping)) 


    let responseDescriptor = RKResponseDescriptor(
     mapping: mapping, 
     method: RKRequestMethod.GET, 
     pathPattern: "", 
     keyPath: "", 
     statusCodes: NSIndexSet(index: 200) 
    )

我得到3个nsmanagedobjects而不是1：

nid nil, body nil 
nid 0, body <p>test test test</p> 
nid 4, body nil

谢谢！

来源

2016-02-27 Jan F.

显示实体。 JSON是讨厌的。 – Wain

json来自drupal。我在帖子中添加了实体的属性类型。谢谢 –

所以你有没有关系的普通值，但你正在使用关系映射？您需要一个自定义值转换器，而不是关系映射。 – Wain

像韦恩说，我不得不使用一个自定义值转换器，而不是RKRelationshipMapping：

let transformer = RKBlockValueTransformer(validationBlock: { (inputClass:AnyClass!,outputClass:AnyClass!) -> Bool in 

     if inputClass.isSubclassOfClass(NSArray.self) { //__NSCFArray 
      return true 
     } 

     return false 

     }) { (inputValue:AnyObject!, outputValue, outputClass, error) -> Bool in 

      if let arr = inputValue as? NSArray { 
       if let dic = arr[0] as? NSDictionary { 
        if(outputClass.isSubclassOfClass(NSString.self)) { 
         if let str = dic["value"] as? NSString { 
          outputValue.memory = str //outputValue is AutoreleasingUnsafeMutablePointer<AnyObject?> 
          return true 
         } 
        } 
        if(outputClass.isSubclassOfClass(NSNumber.self)) { 
         if let nr = dic["value"] as? String { 
          outputValue.memory = Int(nr) 
          return true 
         } 
        } 
       } 
      } 

      return false 
    } 

    RKValueTransformer.defaultValueTransformer().addValueTransformer(transformer) 

    let mapping = RKEntityMapping(forEntityForName: "Content", inManagedObjectStore: manager.managedObjectStore) 
    mapping.addAttributeMappingsFromDictionary([ 
     "nid"  : "nid", 
     "body"  : "body" 
     ]) 

    let responseDescriptor = RKResponseDescriptor(
     mapping: mapping, 
     method: RKRequestMethod.GET, 
     pathPattern: "", 
     keyPath: "", 
     statusCodes: NSIndexSet(index: 200) 
    )

来源

2016-03-02 19:09:20

使用RKEntityMapping和RKRelationshipMapping获取许多记录

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