同期エラーの処理 - React Native SDK

const syncConfigWithRecoverClientReset = {
  flexible: true,
  clientReset: {
    mode: 'recoverUnsyncedChanges',
    onBefore: realm => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onAfter: (beforeRealm, afterRealm) => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onFallback: (session, path) => {
      // See below "Manual Client Reset Fallback" section for example
    },
  },
};
function RealmWithRecoverUnsyncedChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithRecoverClientReset}>
      <RestOfApp />
    </RealmProvider>
  );
}

const syncConfigWithRecoverClientReset = {
  flexible: true,
  clientReset: {
    mode: Realm.ClientResetMode.RecoverUnsyncedChanges,
    onBefore: realm => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onAfter: (beforeRealm, afterRealm) => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onFallback: (session, path) => {
      // See below "Manual Client Reset Fallback" section for example
    },
  },
};
function RealmWithRecoverUnsyncedChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithRecoverClientReset}>
      <RestOfApp />
    </RealmProvider>
  );
}

const syncConfigWithRecoverDiscardClientReset = {
  flexible: true,
  clientReset: {
    mode: 'recoverOrDiscardUnsyncedChanges',
    onBefore: realm => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onAfter: (beforeRealm, afterRealm) => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onFallback: (session, path) => {
      // See below "Manual Client Reset Fallback" section for example
    },
  },
};
function RealmWithRecoverOrDiscardUnsyncedChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithRecoverDiscardClientReset}>
      <RestOfApp />
    </RealmProvider>
  );
}

const syncConfigWithRecoverDiscardClientReset = {
  flexible: true,
  clientReset: {
    mode: Realm.ClientResetMode.RecoverOrDiscardUnsyncedChanges,
    onBefore: realm => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onAfter: (beforeRealm, afterRealm) => {
      // This block could be used for custom recovery, reporting, debugging etc.
    },
    onFallback: (session, path) => {
      // See below "Manual Client Reset Fallback" section for example
    },
  },
};
function RealmWithRecoverOrDiscardUnsyncedChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithRecoverDiscardClientReset}>
      <RestOfApp />
    </RealmProvider>
  );
}

let realm; // value assigned in <RestOfApp> with useRealm()
const syncConfigWithClientResetFallback = {
  flexible: true,
  clientReset: {
    mode: 'recoverOrDiscardUnsyncedChanges', // or "recoverUnsyncedChanges"
    // can also include `onBefore` and `onAfter` callbacks
    onFallback: (_session, path) => {
      try {
        // Prompt user to perform a client reset immediately. If they don't,
        // they won't receive any data from the server until they restart the app
        // and all changes they make will be discarded when the app restarts.
        const didUserConfirmReset = showUserAConfirmationDialog();
        if (didUserConfirmReset) {
          // Close and delete old realm from device
          realm.close();
          Realm.deleteFile(path);
          // Perform client reset
          Realm.App.Sync.initiateClientReset(app, path);
          // Navigate the user back to the main page or reopen the
          // the Realm and reinitialize the current page
        }
      } catch (err) {
        // Reset failed. Notify user that they'll need to
        // update the app
      }
    },
  },
};
function RealmWithManualClientResetFallback() {
  return (
    <RealmProvider sync={syncConfigWithClientResetFallback}>
      <RestOfApp />
    </RealmProvider>
  );
}
function RestOfApp() {
  // Assigning variable defined above to a realm.
  realm = useRealm();
  return <>{/* Other components in rest of app */}</>;
}

let realm; // value assigned in <RestOfApp> with useRealm()
const syncConfigWithClientResetFallback = {
  flexible: true,
  clientReset: {
    mode: Realm.ClientResetMode.RecoverOrDiscardUnsyncedChanges, // or "recoverUnsyncedChanges"
    // can also include `onBefore` and `onAfter` callbacks
    onFallback: (_session, path) => {
      try {
        // Prompt user to perform a client reset immediately. If they don't,
        // they won't receive any data from the server until they restart the app
        // and all changes they make will be discarded when the app restarts.
        const didUserConfirmReset = showUserAConfirmationDialog();
        if (didUserConfirmReset) {
          // Close and delete old realm from device
          realm.close();
          Realm.deleteFile(path);
          // Perform client reset
          Realm.App.Sync.initiateClientReset(app, path);
          // Navigate the user back to the main page or reopen the
          // the Realm and reinitialize the current page
        }
      } catch (err) {
        // Reset failed. Notify user that they'll need to
        // update the app
      }
    },
  },
};
function RealmWithManualClientResetFallback() {
  return (
    <RealmProvider sync={syncConfigWithClientResetFallback}>
      <RestOfApp />
    </RealmProvider>
  );
}
function RestOfApp() {
  // Assigning variable defined above to a realm.
  realm = useRealm();
  return <>{/* Other components in rest of app */}</>;
}

// Once you have opened your Realm, you will have to keep a reference to it.
// In the error handler, this reference is called `realm`
async function handleSyncError(session, syncError) {
  if (syncError.name == 'ClientReset') {
    console.log(syncError);
    try {
      console.log('error type is ClientReset....');
      const path = realm.path; // realm.path will not be accessible after realm.close()
      realm.close();
      Realm.App.Sync.initiateClientReset(app, path);
      // Download Realm from the server.
      // Ensure that the backend state is fully downloaded before proceeding,
      // which is the default behavior.
      realm = await Realm.open(config);
      realm.close();
    } catch (err) {
      console.error(err);
    }
  } else {
    // ...handle other error types
  }
}
const syncConfigWithDiscardAfterBreakingSchemaChanges = {
  flexible: true,
  clientReset: {
    mode: 'discardUnsyncedChanges',
    onBefore: realm => {
      // NOT used with destructive schema changes
      console.log('Beginning client reset for ', realm.path);
    },
    onAfter: (beforeRealm, afterRealm) => {
      // Destructive schema changes do not hit this function.
      // Instead, they go through the error handler.
      console.log('Finished client reset for', beforeRealm.path);
      console.log('New realm path', afterRealm.path);
    },
  },
  onError: handleSyncError, // invoked with destructive schema changes
};
function RealmWitDiscardAfterBreakingSchemaChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithDiscardAfterBreakingSchemaChanges}>
      <RestOfApp />
    </RealmProvider>
  );
}

// Once you have opened your Realm, you will have to keep a reference to it.
// In the error handler, this reference is called `realm`
async function handleSyncError(session, syncError) {
  if (syncError.name == 'ClientReset') {
    console.log(syncError);
    try {
      console.log('error type is ClientReset....');
      const path = realm.path; // realm.path will not be accessible after realm.close()
      realm.close();
      Realm.App.Sync.initiateClientReset(app, path);
      // Download Realm from the server.
      // Ensure that the backend state is fully downloaded before proceeding,
      // which is the default behavior.
      realm = await Realm.open(config);
      realm.close();
    } catch (err) {
      console.error(err);
    }
  } else {
    // ...handle other error types
  }
}
const syncConfigWithDiscardAfterBreakingSchemaChanges = {
  flexible: true,
  clientReset: {
    mode: Realm.ClientResetMode.DiscardUnsyncedChanges,
    onBefore: realm => {
      // NOT used with destructive schema changes
      console.log('Beginning client reset for ', realm.path);
    },
    onAfter: (beforeRealm, afterRealm) => {
      // Destructive schema changes do not hit this function.
      // Instead, they go through the error handler.
      console.log('Finished client reset for', beforeRealm.path);
      console.log('New realm path', afterRealm.path);
    },
  },
  onError: handleSyncError, // invoked with destructive schema changes
};
function RealmWitDiscardAfterBreakingSchemaChangesClientReset() {
  return (
    <RealmProvider sync={syncConfigWithDiscardAfterBreakingSchemaChanges}>
      <RestOfApp />
    </RealmProvider>
  );
}