[英]Swift Firebase Snapshot to object model
I am working with a large firebase database with at least 6 layers of hierarchy as well as many children for each node. 我正在使用大型Firebase数据库,该数据库至少具有6层层次结构,并且每个节点有许多子级。 I wanted to parse the entire snapshot and convert it into an object model.
我想解析整个快照并将其转换为对象模型。 I found this solution but in my opinion it is extremely inefficient as parsing each node's children requries a call to firebase and this increases latency exponentially.
我找到了这种解决方案,但是我认为解析每个节点的子级需要调用Firebase的方式效率极低,并且延迟成倍增加。 Is there any way for the "ref.observeSingleEvent" to be done locally instead of making a call to firebase?
有什么办法可以在本地完成“ ref.observeSingleEvent”而不是调用firebase吗? Any other better alternatives would be much appreciated.
任何其他更好的选择将不胜感激。
//this goes into your call (observeSingleEvent)
let enumerator = snapshot.children //assuming you use snapshot as name
while let rest = enumerator.nextObject() as? FIRDataSnapshot {
// this loops through every child in that map
let values = (rest as! DataSnapshot).value as? NSDictionary
let coins= values?["coins"] as? Int ?? 0
//above code looks for a key with username and grabs the value from that. If it is not a string value it returns the default value.
//use above code for picture 1
if (rest as! DataSnapshot).key == "slot"{
let enumeratorMap1 = (rest as! DataSnapshot).children
while let rest2 = enumeratorMap1.nextObject() as? FIRDataSnapshot {
let valuesMap1 = (rest2 as! DataSnapshot).value as? NSDictionary
//loop through values in new map
//use this methodes for looping through maps, as stated in picture 2
//keep repeating this method for any child under the map
}
}
}
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