Is Parse a good alternative to Firebase?

cbaker6 · March 11, 2021, 3:20pm

You can accomplish this with LiveQuery (this has been around for some years, pre 2017 I believe. If I recall correctly LiveQuery was announced around the same time Firebase announced they were using Websockets, which is what LiveQuery uses) which is available in Android, Flutter, JS, iOS, ParseSwift, etc. SDKs. Though I don’t know much about Vue, @dblythy and I mentioned this here, seemed similar to SwiftUI from my understanding. From a programming/SDK perspective, you should be able to bind your model (Parse Server Database) to any view. There’s a simple example of doing this in the Parse-Swift SDK in Swift Playgrounds:

github.com

parse-community/Parse-Swift/blob/0ac301b567d2de31ce7f5952a69038c851439e99/ParseSwift.playground/Pages/11 - LiveQuery.xcplaygroundpage/Contents.swift#L33-L86


      
          //: Create a query just as you normally would.
          var query = GameScore.query("score" > 9)
          
          //: To use subscriptions inside of SwiftUI
          struct ContentView: View {
          
              //: A LiveQuery subscription can be used as a view model in SwiftUI
              @ObservedObject var subscription = query.subscribe!
          
              var body: some View {
                  VStack {
          
                      if subscription.subscribed != nil {
                          Text("Subscribed to query!")
                      } else if subscription.unsubscribed != nil {
                          Text("Unsubscribed from query!")
                      } else if let event = subscription.event {
          
                          //: This is how you register to receive notificaitons of events related to your LiveQuery.
                          switch event.event {

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Essentially, in Parse, when your view first comes on screen, you can run a traditional find/first/get query to “pull” your data from the server. Then, you can “subscribe” to that query (assuming you have LiveQuery enabled) and bind that to your view to react to any changes on the server.