GraphQL response error on fetching user by id

[mtalhastar]

When i call this function from flutter app passing correct user id stored in my dynamo db as parameter , it shows me following error.

CLI v 12.7.1

Error:

here is the code snippet:

[Tructivity]

@haverchuck @ykethan Can you guys help, please? We are stuck in this error!

[Equartey]

Hi @mtalhastar,

Sorry you ran into this error. If your use case is to simply fetch a single model by ID we offer a discrete API for this. Here is an example of how to construct that request given an ID as a string.

  Future<userType?> queryItem(String id) async {
    try {
      final id = userTypeModelIdentifier(id: '123');
      final request = ModelQueries.get(
        userType.classType,
        id,
      );
      final response = await Amplify.API.query(request: request).response;

      if (response.data == null) {
        safePrint(response.errors);
      }

      return response.data;
    } on ApiException catch (e) {
      safePrint(e);
    }
  }

The example you provided using a query predicate is typically used when fetching one or more models based on a non-id field. However, I would expect your example to work as written. If your use case requires query predicates, in order to troubleshoot the issue further, can you please provide your schema.graphql file?

[mtalhastar]

On this i receive error below:

GraphQL file:
grahql.txt

[Equartey]

Hi @mtalhastar,

Models should follow title casing such as UserType.

This subtile difference is making the underlying generated functions unable to find required properties and methods.

You will need to update your model names and redeploy your backend for the Model helper functions to work.

It's unclear to me at the moment if this is a bug or by design. I'm going to leaving this issue open so we can track the investigation internally.

[mtalhastar]

Cant just changing model titles in schema.graphql file work? instead of changing names in GraphQl models in amplify backend?

[Tructivity]

@dnys1 I've seen you that you are a contributor to AWS Amplify in Flutter and I'm facing a problem for days here so can you please help?

[Equartey]

Hi @mtalhastar,

Cant just changing model titles in schema.graphql file work? instead of changing names in GraphQl models in amplify backend?

Apologies, I could have been more clear. You will update the model names in your schema.graphql, this file determines the graphql backend. After updating this file please rebuild your models with amplify codegen models and then push the changes to your amplify backend with amplify push.

[Tructivity]

@Equartey Why I can't directly connect my Flutter app to the already developed Amplify backend without any changes to it?

If I made these changes, then the web application won't work again so I need more extra work from the web developer to fix them.

[Tructivity]

@Equartey Can u provide an answer for my question please? I need it