Can’t generate RealmModel in Flutter

MongoDB Atlas App Services & Realm
#1

I followed the basic example, but when I run the command flutter pub run realm generate, it can’t run forever (about 30 minutes). Please help me. Thank you.

Ran on: Dell | Flutter 3.7.12 | Dart 2.19.6 | realm 1.0.3
What I’ve done:

  • Restart the terminal
  • Restart the computer

Repro Steps

  1. Add the code snippet below (app.dart) to a flutter project
  2. Run flutter pub run realm generate

Code Snippet
/lib/app.dart

import 'package:realm/realm.dart';  // import realm package

part 'app.g.dart'; // declare a part file.

@RealmModel() // define a data model class named `_Car`.
class _Car {
  late String make;

  late String model;

  int? kilometers = 500;
}

Screenshot_103

#2

Adding your model to a freshly created flutter project in the file lib/app.dart and running generate

❯ time dart run realm generate
Building package executable... 
Built realm:realm.
[INFO] Generating build script...
[INFO] Generating build script completed, took 149ms

[INFO] Initializing inputs
[INFO] Reading cached asset graph...
[INFO] Reading cached asset graph completed, took 30ms

[INFO] Checking for updates since last build...
[INFO] Checking for updates since last build completed, took 476ms

[INFO] Running build...
[INFO] 1.5s elapsed, 0/1 actions completed.
[INFO] Running build completed, took 1.6s

[INFO] Caching finalized dependency graph...
[INFO] Caching finalized dependency graph completed, took 18ms

[INFO] Succeeded after 1.6s with 1 outputs (1 actions)


________________________________________________________
Executed in    3.73 secs    fish           external
   usr time    4.45 secs    0.09 millis    4.45 secs
   sys time    0.82 secs    1.64 millis    0.82 secs

So a little under 4s on my M1 Max. It shouldn’t hang like you describe.

Could you share what output you do see, as well as how your pubspec.yaml looks?

#3

Also, what is the output of flutter doctor -v?

#4 
name: flutter_application_4
description: A new Flutter project.

publish_to: 'none' # Remove this line if you wish to publish to pub.dev



version: 1.0.0+1

environment:
  sdk: '>=2.19.6 <3.0.0'


dependencies:
  flutter:
    sdk: flutter


  cupertino_icons: ^1.0.2
  realm: ^1.0.3
  build_runner: ^2.3.3

dev_dependencies:
  flutter_test:
    sdk: flutter
  realm_generator: ^1.0.3  

 
  flutter_lints: ^2.0.0


flutter:

 
  uses-material-design: true
#5

Screenshot_104
Screenshot_104886×907 33.9 KB

#6

When I run the command there is no output and it just hangs, even though I have created a brand new project

Screenshot_105
Screenshot_1051392×729 47.6 KB

#7

On Mac I don’t hang with that combination, but I do get a failure on exit.

❯ flutter pub run realm generate
pub finished with exit code 255

I’ll need to investigate further.

#8

I look forward to hearing from you

#9

This is a bit puzzling. Can I ask you to update to latest stable (3.10.1) and remove the realm_generator dev dependency (Realm will pull it in as normal dependency).

#10

Thank you for your help. The problem has been resolved. The problem was caused by my network. I solved using VPN 1.1.1.1 and the command flutter pub run realm generate worked.