ModelQueries.list fails randomly without any logs

[harini18]

Description

ModelQueries.list response does not return sometimes. I am able to get the right values like 10% of the time, rest of the time there is no reply and no logs to debug this issue.

Categories

• Analytics
• API (REST)
• API (GraphQL)
• Auth
• Authenticator
• DataStore
• Notifications (Push)
• Storage

Steps to Reproduce

My Schema:

 Goal: a
    .model({
      direction: a.enum(["INCREASE", "DECREASE"]),
      from: a.float(),
      to: a.float(),
      vitalId: a.id().required(),
      vital: a.belongsTo("Vital", "vitalId"),
      eventId: a.id().required(),
      event: a.belongsTo("Event", "eventId"),
    })
    .authorization((allow) => [allow.owner()]),
  // Vitals Related
  StandardVital: a
    .model({
      name: a.string(),
      vitals: a.hasMany("Vital", "standardVitalId"),
    })
    .authorization((allow) => [
      allow.authenticated().to(["read"]),
      allow.group("Admin"),
    ]),
  CustomVital: a
    .model({
      name: a.string(),
      vitals: a.hasMany("Vital", "customVitalId"),
    })
    .authorization((allow) => [allow.owner()]),
  Vital: a
    .model({
      standardVitalId: a.id(),
      standardVital: a.belongsTo("StandardVital", "standardVitalId"),
      customVitalId: a.id(),
      customVital: a.belongsTo("CustomVital", "customVitalId"),
      goalId: a.id(),
      goal: a.hasOne("Goal", "vitalId"),
      vitalMeasurementLogs: a.hasMany("VitalMeasurementLog", "vitalId"),
    })
    .authorization((allow) => [allow.owner()]),

My Query:

try {
      final request = ModelQueries.list(
        Goal.classType,
        where: Goal.EVENT.eq(event.id),
      );
      final response = await Amplify.API.query(request: request).response;

      if (response.hasErrors) {
        safePrint('errors: ${response.errors}');
        return [];
      }

      final goals = response.data?.items ?? <Goal?>[];

      return goals;
    } on Exception catch (e) {
      safePrint(e);
      rethrow;
    }

For some reason - I don't get response. When I try to debug, the code does flow through after final response = await Amplify.API.query(request: request).response;. There are no logs in VSCode and there are no exceptions that are thrown.

No Idea what is happening.

I am creating this object using:

// Create Vital
    final newVital = Vital(id: uuid(), standardVital: standardVital);

    final vitalRequest = ModelMutations.create(newVital);
    final vitalResponse =
        await Amplify.API.mutate(request: vitalRequest).response;

    if (vitalResponse.data == null) {
      throw Exception("Goal Creation Failed");
    }

    final newlyCreatedVital = (await Amplify.API
            .query(
                request: ModelQueries.get(
                    Vital.classType, vitalResponse.data!.modelIdentifier))
            .response)
        .data;

    // Create Goal
    final newGoal = Goal(
        id: uuid(),
        event: event,
        direction: goalDirection,
        vital: newlyCreatedVital,
        from: from,
        to: to);
    final request = ModelMutations.create(newGoal);
    final response = await Amplify.API.mutate(request: request).response;

Screenshots

No response

Platforms

• iOS
• Android
• Web
• macOS
• Windows
• Linux

Flutter Version

3.24.0

Amplify Flutter Version

2.0.0

Deployment Method

Amplify CLI

Schema

No response

[NikaHsn]

Sorry that you are facing this issue and thanks for reporting it. does it only happen on iOS?

[harini18]

Yes in iOS emulator.

[NikaHsn]

thanks for confirming. we will look into this issue and get back to you with any updates.

[harini18]

Any updates - we are blocked completely.

[Jordan-Nelson]

@harini18 - This is currently in our backlog of issues to attempt to reproduce.

Was this previously working on iOS?

[harini18]

No it never worked.

[Jordan-Nelson]

@harini18 Can you use Flutter dev tools to monitor the network traffic (see: https://docs.flutter.dev/tools/devtools/network) and share a screenshot of the request/response? Do you see the request complete in the dev tools?

[harini18]

Create Vitals

Request:

{"variables":{"input":{"id":"c6f037ff-86aa-4e01-8b84-76388a105dce","standardVitalId":"328d85f0-e1e9-4d99-a71c-38351f42e54e"}},"query":"mutation createVital($input: CreateVitalInput!, $condition: ModelVitalConditionInput) { createVital(input: $input, condition: $condition) { id createdAt updatedAt standardVital { id name createdAt updatedAt } standardVitalId customVital { id name createdAt updatedAt owner } customVitalId goal { id direction from to createdAt updatedAt owner } goalId owner } }"}
Response:
{"data":{"createVital":{"id":"c6f037ff-86aa-4e01-8b84-76388a105dce","createdAt":"2024-08-30T13:29:14.740Z","updatedAt":"2024-08-30T13:29:14.740Z","standardVital":null,"standardVitalId":"328d85f0-e1e9-4d99-a71c-38351f42e54e","customVital":null,"customVitalId":null,"goal":null,"goalId":null,"owner":"4801b350-9091-70f1-1e36-3f4990f754b5"}},"errors":[{"path":["createVital","standardVital","id"],"locations":null,"message":"Cannot return null for non-nullable type: 'ID' within parent 'StandardVital' (/createVital/standardVital/id)"},{"path":["createVital","standardVital","createdAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'StandardVital' (/createVital/standardVital/createdAt)"},{"path":["createVital","standardVital","updatedAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'StandardVital' (/createVital/standardVital/updatedAt)"},{"path":["createVital","customVital","id"],"locations":null,"message":"Cannot return null for non-nullable type: 'ID' within parent 'CustomVital' (/createVital/customVital/id)"},{"path":["createVital","customVital","createdAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'CustomVital' (/createVital/customVital/createdAt)"},{"path":["createVital","customVital","updatedAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'CustomVital' (/createVital/customVital/updatedAt)"},{"path":["createVital","goal","id"],"locations":null,"message":"Cannot return null for non-nullable type: 'ID' within parent 'Goal' (/createVital/goal/id)"},{"path":["createVital","goal","createdAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'Goal' (/createVital/goal/createdAt)"},{"path":["createVital","goal","updatedAt"],"locations":null,"message":"Cannot return null for non-nullable type: 'AWSDateTime' within parent 'Goal' (/createVital/goal/updatedAt)"}]}

Get Vital

Request

{"variables":{"id":"c6f037ff-86aa-4e01-8b84-76388a105dce"},"query":"query getVital($id: ID!) { getVital(id: $id) { id createdAt updatedAt standardVital { id name createdAt updatedAt } standardVitalId customVital { id name createdAt updatedAt owner } customVitalId goal { id direction from to createdAt updatedAt owner } goalId owner } }"}

Response
{"data":{"getVital":{"id":"c6f037ff-86aa-4e01-8b84-76388a105dce","createdAt":"2024-08-30T13:29:14.740Z","updatedAt":"2024-08-30T13:29:14.740Z","standardVital":{"id":"328d85f0-e1e9-4d99-a71c-38351f42e54e","name":"Body Fat Percentage","createdAt":"2024-08-21T01:16:27.358Z","updatedAt":"2024-08-21T01:16:27.358Z"},"standardVitalId":"328d85f0-e1e9-4d99-a71c-38351f42e54e","customVital":null,"customVitalId":null,"goal":null,"goalId":null,"owner":"4801b350-9091-70f1-1e36-3f4990f754b5"}}}

Create Goal

Request
{"variables":{"input":{"id":"84c1a806-82bf-4f39-8c04-73e761402ed9","direction":"DECREASE","from":26.0,"to":20.0,"eventId":"6bab29a4-a120-4b7f-8c0a-e904b4ac30c4"}},"query":"mutation createGoal($input: CreateGoalInput!, $condition: ModelGoalConditionInput) { createGoal(input: $input, condition: $condition) { id direction from to createdAt updatedAt event { id name date createdAt updatedAt owner } eventId owner } }"}

Response
{"data":null,"errors":[{"path":null,"locations":[{"line":1,"column":21,"sourceName":null}],"message":"Variable 'input' has coerced Null value for NonNull type 'ID!'"}]}