Swift Realm change only one object value - swift

Question

class User: Object {
#objc dynamic var id = ""
#objc dynamic var dateFirstStart:TimeInterval = 0
//dates
#objc dynamic var dateLastStart:TimeInterval = 0
#objc dynamic var dateLastAppClose:TimeInterval = 0
#objc dynamic var dateLastDataUpdateCheck:TimeInterval = 0
#objc dynamic var dateLastFilesUpdateCheck:TimeInterval = 0
override class func primaryKey() -> String? {
return "id"
}
}
Do I really have to create a function for each value to change? Like this:
func updateUserDateFirstStart(date:Date){
do {
let realm = try Realm()
try realm.write {
let user = getUser()
user. dateLastStart = Date().timeIntervalSince1970
}
} catch let error as NSError {
print("ERROR \(error.localizedDescription)")
}
}
What I want is something like
let user = getUser()
user.dateLastStart = Date().timeIntervalSince1970
dataManager.updateUser(user)
And in my DataManager:
func updateUser(user:User){
do {
let realm = try Realm()
try realm.write {
realm.add(user, update: true)
}
} catch let error as NSError {
print("ERROR \(error.localizedDescription)")
}
}
But if I do it as you can see in my wishtohave solution I always get an Attempting to modify object outside of a write transaction error.
I tried to create a complete new Object and use the id from the object I want to change. This works but would need even more lines of code.

Answer 1

You can use KVO to update one value in realm object
how to call
let user = getUser()
self.update(ofType:user, value: Date().timeIntervalSince1970 as AnyObject, key: "dateLastStart")
Helper func
func update(ofType:Object,value:AnyObject,key:String)->Bool{
do {
let realm = try Realm()
try realm.write {
ofType.setValue(value, forKeyPath: key)
}
return true
}catch let error as NSError {
fatalError(error.localizedDescription)
}
return false
}