When to open realms async vs sync

MongoDB Atlas App Services & Realm Atlas Device Sync
3

I’m using React Native. Here’s the function that I call to open a connection to Realm.

shouldConnectAsync is passed in as true when the partition value is changed (on login) and the database variable is exported from this file and used throughout the app.

export const connect = async (shouldConnectAsync?: boolean) => {
  if (!app.currentUser) {
    return Promise.reject(new Error('Current user not found'))
  }

  const partitionValue = getPartition() // This gets the partition value for the current user

  if (!partitionValue) {
    return Promise.reject(new Error('Authorization failed'))
  }

  const config = {
    sync: {
      user: app.currentUser,
      partitionValue,
    },
    schema,
  }

  database = shouldConnectAsync ? await Realm.open(config) : new Realm(config)
}