关于ios：Realm Swift更新对象和JSON字符串

Realm + Swift update object with JSON string

我正在使用alamofire从服务器获取响应JSON，然后使用ObjectMapper将字符串映射到Realm对象。

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The realm object is:
class SolutionVideo: Object, Mappable {

dynamic var svID = 0
dynamic var solutionTitle =""
dynamic var videoName =""
dynamic var relatedInfo =""
dynamic var shortDesc =""

override static func primaryKey() -> String? {
return"svID"
}

required convenience init?(_ map: Map) {
self.init()
}

func mapping(map: Map) {
svID <- map["svID"]
solutionTitle <- map["solutionTitle"]
videoName <- map["videoName"]
relatedInfo <- map["relatedInfo"]
shortDesc <- map["shortDescription"]
}

} ??

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The json string is:
[
{
"svID":"10",
"solutionTitle":"Video10",
"videoName":"Video10",
"realtedInfo":"",
"shortDescription":""
},
{
"svID":"9",
"solutionTitle":"Video9",
"videoName":"Video9",
"realtedInfo":"",
"shortDescription":""
}
]

in my viewController:
@IBAction func updateBtn(sender: AnyObject) {
// download file to update Realm
let url ="http://janicedemo.com/updates.json"
Alamofire.request(.GET, url).responseArray { (response: Response<[SolutionVideo], NSError>) in
let Array = response.result.value
print(Array)
if let Array = Array {
for video in Array {
let dbURL = Realm.Configuration.defaultConfiguration.fileURL
let realm = try! Realm(fileURL: dbURL!)
try! realm.write{
print("will save")
realm.add(video, update: true)
}
}
}
}

问题是我可以成功添加对象。但是svID(prikey键)保留为0，而不是10或9(在JSON中设置)。是因为我已将默认值设置为svID吗？有人可以给我提示吗？谢谢

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尝试

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class SolutionVideo: Object, Mappable {

dynamic var svID = 0
dynamic var solutionTitle =""
dynamic var videoName =""
dynamic var relatedInfo =""
dynamic var shortDesc =""

func setCompoundID(id: Int) {
self.svID = svID
compoundKey = compoundKeyValue()
}

func setCompoundID(id: Int) {
self.solutionTitle = solutionTitle
compoundKey = compoundKeyValue()
}

func setCompoundID(id: Int) {
self.videoName = videoName
compoundKey = compoundKeyValue()
}

func setCompoundID(id: Int) {
self.relatedInfo = relatedInfo
compoundKey = compoundKeyValue()
}

func setCompoundID(id: Int) {
self.shortDesc = shortDesc
compoundKey = compoundKeyValue()
}

dynamic lazy var compoundKey: String = self.compoundKeyValue()

override static func primaryKey() -> String? {
return a€?compoundKeya€?
}

func compoundKeyValue() -> String {
return"\\(svID)\\(solutionTitle)\\(videoName)\\(relatedInfo)\\(shortDesc)a€?
}

}