Ich bin neu in AWS und versuche, Daten in meiner Datenbank zu speichern, indem ich das Beispiel aws mit der Tabelle News verwende.DynamoDB in DB speichern
angeschlossen ich diese Funktion der Hauptstoryboard-Taste:
@IBAction func addButton(_ sender: Any) {
let dynamoDbObjectMapper = AWSDynamoDBObjectMapper.default()
//Create data object using data models you downloaded from Mobile Hub
let newsItem: News = News();
// Use AWSIdentityManager.default().identityId here to get the user identity id.
newsItem._userId = "us-east-1:74c8f7ce-244b-4476-963e-0dcb3216f406"
newsItem._articleId = "0123"
newsItem._title = "Banana"
newsItem._author = "Logan"
newsItem._content = "Should I stay or should I go now?"
newsItem._category = "Food"
//Save a new item
dynamoDbObjectMapper.save(newsItem, completionHandler: {
(error: Error?) -> Void in
if let error = error {
print("Amazon DynamoDB Save Error: \(error)")
return
}
print("An item was saved.")
})
}
aber wenn ich den Knopf drücken erhalte ich: mazon DynamoDB Save Error: Error Domain=com.amazonaws.AWSCognitoIdentityErrorDomain Code=0 "(null)" UserInfo={__type=com.amazon.coral.validate#ValidationException, message=Supplied AttributeValue is empty, must contain exactly one of the supported datatypes}
meine Nachrichten Felder sind:
override class func jsonKeyPathsByPropertyKey() -> [AnyHashable: Any] {
return [
"_userId" : "userId",
"_articleId" : "articleId",
"_author" : "author",
"_category" : "category",
"_content" : "content",
"_title" : "title",
]
}
Was die erforderlichen Felder für die zugehörige DynamoDB Tabelle sind? –