swift：MongoDB Realm 未同步到移动设备

Question

when the app is opened I try to sync the cloud data to the app using this function

  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")
        })
   }
   }

and I get the print out that "Realm SYNC IS OPENED" but I began to notice that when I query with this code

 itemrealm = try! Realm(configuration: user.configuration(partitionValue: partitioningValue)

 storeitems = self.itemrealm.objects(Item.self)

the query is not getting all that i have in the cloud cluster.

I guess sync was working well before until I imported more data to the cloud. I currently have atleast 10,000 data in my cluster that are given the partion value being called then I did a.count on storeitems and notice its only pulling about 4,000 items (which is the amount before I imported new data). So the cloud is not syncing the current data.

I then checked my dashboard log and saw this

a clicked on the permission error show this message

Error Type: Sync -> SyncSession End Error: Ending session with error: user does not have write access to partition for schema instructions (ProtocolErrorCode=206)

my sync permission is

 Read : true
 Write : {
   "%%partition": "%%user.id"
  }

Users can read all data but can only write their own data

How can I fix the permission error and sync my latest cluster to the mobile client?

when I switched the write permission to

  "%%user.id": "%%partition"

this is the error i got

Fatal error: Failed to open realm: Error Domain=io.realm.unknown Code=208 "Bad client file identifier (IDENT)" UserInfo={Category=realm::sync::ProtocolError, NSLocalizedDescription=Bad client file identifier (IDENT), Error Code=208}:

Answer 1

Your write permissions are backwards.

instead of this (from the question)

Read : true
Write : {
   "%%partition": "%%user.id"
}

do this

Read : true
Write : {
   "%%user.id": "%%partition"
}

The info comes from the MongoDB Realm Sync Documentation Define Sync Rules