我正在尝试使用DynamoDB表,并已成功连接到该表,但无法读取它。当我尝试时,我得到以下错误:
由于未捕获的异常“NSInternalInconsistencyException”而终止应用程序,原因:“\u datePublished不是ProjectName.Article的属性。”
这是我的文章类/模型:

class Article: AWSDynamoDBObjectModel, AWSDynamoDBModeling {

  var _articleSource: String?
  var _articleUrl: String?
  var _datePublished: String?
  var _headline: String?
  var _imageURL: String?
  var _rating: String?
  var _listingId: String?

  class func dynamoDBTableName() -> String {
    return "tableName"
  }

  class func hashKeyAttribute() -> String {
    return "_listingId"
  }

  class func rangeKeyAttribute() -> String {
    return "_articleUrl"
  }

  override class func jsonKeyPathsByPropertyKey() -> [AnyHashable: Any] {
    return [
      "_articleSource" : "articleSource",
      "_articleUrl" : "articleUrl",
      "_datePublished" : "datePublished",
      "_headline" : "headline",
      "_imageURL" : "imageURL",
      "_rating" : "rating",
      "_listingId" : "listingId",
    ]
  }
}

我调用的函数ViewDidLoad从数据库中读取一篇文章:
 func readArticle() {
let dynamoDbObjectMapper = AWSDynamoDBObjectMapper.default()

// Create data object
let article: Article = Article();
dynamoDbObjectMapper.load(
  Article.self,
  hashKey: "2018-03-17T08:50:30+00:00",
  rangeKey: "https://www.example.com",
  completionHandler: {
    (objectModel: AWSDynamoDBObjectModel?, error: Error?) -> Void in
    if let error = error {
      print("Amazon DynamoDB Read Error: \(error)")
      return
    }
    print("Article:\n \(article)")
})

}
我做错什么了?DATE发布在DB上的条目中,并在模型中定义

最佳答案

检查datePublished是否是数据库中的字符串或日期类型。如果类型不匹配,则会出现错误。

关于swift - NSInternalInconsistencyExceptionException _variable不是projectName.Classname的属性,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/49395869/

10-12 03:36