Isar Inspector with multiple instances

[FritzMatthaeus]

Steps to Reproduce

I do create multiple Isar Instances each with different schemas. When i open the isar inspector, i can see all schemas but only in first instance there ist data displayed. When switching instances the isar inspector is stuck to loading

Code sample

create a new flutter project with isar, path_provider and build_runner dependencies. Paste this code in main.dart, run the App and open the Isar Inspector Link. the Foo instance will show data, the Bar instance will show loading.

import 'package:flutter/material.dart';
import 'package:isar/isar.dart';
import 'package:path_provider/path_provider.dart';

part 'main.g.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  final directory = await getApplicationDocumentsDirectory();

  final fooIsar =
      await Isar.open([FooSchema], directory: directory.path, name: "Foo");
  final barIsar =
      await Isar.open([BarSchema], directory: directory.path, name: "Bar");

  await fooIsar.writeTxn(() async {
    await fooIsar.foos.put(Foo(id: 1, name: "foo"));
  });
  await barIsar.writeTxn(() async {
    await barIsar.bars.put(Bar(id: 1, name: "bar"));
  });

  runApp(const MyApp());
}

@collection
class Bar {
  final Id id;
  final String name;
  Bar({
    required this.id,
    required this.name,
  });
}

@collection
class Foo {
  final Id id;
  final String name;
  Foo({
    required this.id,
    required this.name,
  });
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Isar Example'),
        ),
        body: const Center(
          child: Column(
            mainAxisAlignment: MainAxisAlignment.center,
            children: <Widget>[
              Text('Isar Example'),
            ],
          ),
        ),
      ),
    );
  }
}

Details

• Platform: Android 13, Samsung Galaxy A54, but also occured on other Android devices
• Flutter version: 3.24.1
• Isar version: 3.1.7

---

• I searched for similar issues already
• I filled the details section with the exact device model and version
• I am able to provide a reproducible example

[FritzMatthaeus]

I have been trying to debug this. Unfortunately i was not able to get the Isar Inspector running in Debug mode and connect to my Isar-Instance :( So i am depending on help. I could find out, that on changing the Isar Instance the following JS-Error is thrown:

Uncaught Error: ext.isar.executeQuery: (-32000) Server error
Null check operator used on a null value

i could trace it to this method in the isar inspector package connect_client.dart:

Future<Map<String, Object?>> executeQuery(ConnectQuery query) async {
    return _call<Map<String, Object?>>(
      ConnectAction.executeQuery,
      args: query.toJson(),
      timeout: kLongTimeout,
    );
  }

ConnectAction.executeQuery connects to the Isar Instance and seems to fail as the JS Error indicates.

If anyone feels competent to address this issue, i would be very grateful. As far is could research, this issue has been fixed for V4 by the original Author of the Isar Package. So there is a fix somewhere deep down in the Rust Core... but i have no clue how to track this.

Thanks and best regards,
Fritz

[stodevCoding]

@FritzMatthaeus Hi, I had a similar issue, but with a hot reload by pressing Shift + R, I do get the link to access the Isar Inspector, and it only works in Chrome.

[FritzMatthaeus]

@FritzMatthaeus Hi, I had a similar issue, but with a hot reload by pressing Shift + R, I do get the link to access the Isar Inspector, and it only works in Chrome.

Thank you, but maybe my issue was not clear. I can open the inspector in chrome, but i cannot switch between my different Isar Instances. Only the first opened instance is accessible. See the code example.