Swift: MongoDB Realm 查询时不同步

Question

I'm not getting the latest data in my MongoDB cluster when I query the realm in swift. I initially had about 4000 data in the realm and that synced to mobile but when I increased the data to about 10,000 it does not sync the latest just what was there before. I noticed this print out when the app starts up.

Sync: Connection[1]: Session[1]: client_reset_config = false, Realm exists = true, async open = false, client reset = false.

this is how I try to sync when the starts up

struct AppRootView: View {
@State var homeLink = false // <- add here
@State var loginLink = false
@State private var selection: String? = nil


var body: some View {
  NavigationView { // <- wrap in the `NavigationView`
    VStack(alignment: .leading) {
        Text("App")
            .bold()
            .font(.largeTitle)
        
        NavigationLink(destination: homeMainView(), tag: "home", selection: $selection) {EmptyView()}
        NavigationLink(destination: LoginView(), tag: "login", selection: $selection) {EmptyView()}
    }

 }
.onAppear(perform: handleSignIn)
.frame(minWidth: 0,
       maxWidth: .infinity,
       minHeight: 0,
       maxHeight: .infinity).background(Color.yellow)
}

func handleSignIn() {
  print("HANDLING SIGNING IN")
  if let _ = app.currentUser() {
    print("USER IS LOGGED IN ALREADY")
    self.handleRealmSync()

    self.selection = "home" // <- activate the `NavigationLink`
} else {
    print("USER NEEDS TO LOGIN")
    self.selection = "login"
    print("not logged in; present sign in/signup view")
 }
 }

 func handleRealmSync(){
 let user = app.currentUser()
 let partitionValue = "store=walmart"

 Realm.asyncOpen(configuration: user!.configuration(partitionValue: partitionValue),

    callback: { (maybeRealm, error) in
        guard error == nil else {
            fatalError("Failed to open realm: \(error!)")
        }
        guard let realm = maybeRealm else {
            fatalError("realm is nil!")
        }
        // realm opened
        print("Realm SYNC IS OPENED")
     })
  }
 }

I get a print out "Realm SYNC IS OPENED" which makes me think it should be but this

Realm exists = true, async open = false

appears to be in conflict. Then I checked MongoDB Realm Log on Sync Session. This is the message

["Session closed after receiving UNBIND event"]

it shows that the sync is not happening. What could be preventing the syncing? Any help will be greatly appreciated.

Answer 1

You probably only need to make sure the Realm isn't deinitialized.

You could create a @State property to store the Realm instance received in the callback:

@State var realm:Realm?

and

 Realm.asyncOpen(configuration: user!.configuration(partitionValue: partitionValue)) { (maybeRealm, error) in
        guard error == nil else {
            fatalError("Failed to open realm: \(error!)")
        }
        guard let realm = maybeRealm else {
            fatalError("realm is nil!")
        }
        // realm opened
        print("Realm SYNC IS OPENED")
        self.realm = maybeRealm
     }
  }