API override error

[nikname]

Before opening, please confirm:

• [X] I have installed the latest version of the Amplify CLI (see above), and confirmed that the issue still persists.
• [X] I have searched for duplicate or closed issues.
• [X] I have read the guide for submitting bug reports.
• [X] I have done my best to include a minimal, self-contained set of instructions for consistently reproducing the issue.
• [X] I have removed any sensitive information from my code snippets and submission.

How did you install the Amplify CLI?

npm

If applicable, what version of Node.js are you using?

v14.19.0

Amplify CLI Version

7.6.21

What operating system are you using?

Windows 10

Did you make any manual changes to the cloud resources managed by Amplify? Please describe the changes made.

No manual changes made

Amplify Categories

api

Amplify Commands

override, push

Describe the bug

After editing the override.ts file (generated from amplify override api) to add a custom resolver when I try to push the changes I see the following error in the output

🛑 Error: Skipping override due to VMError: Cannot find module 'fs'

If I confirm the push operation I don't see my changes.

Expected behavior

See my changes

Reproduction steps

1. amplify override api
2. Edit the override.ts file as follow

   
   import { AmplifyApiGraphQlResourceStackTemplate } from "@aws-amplify/cli-extensibility-helper";
   import * as appsync from "@aws-cdk/aws-appsync";

export function override(resources: AmplifyApiGraphQlResourceStackTemplate) { const createGroupMessageResolver = new appsync.CfnResolver(resources.api.rootstack, "PromotePost", { apiId: resources.api.GraphQLAPI.attrApiId, fieldName: "promotePost", typeName: "Mutation", requestMappingTemplate: appsync.MappingTemplate.fromFile(${__dirname}/resolvers/Mutation.promotePost.req.vtl).renderTemplate(), responseMappingTemplate: appsync.MappingTemplate.fromFile(${__dirname}/resolvers/Mutation.promotePost.res.vtl).renderTemplate(), dataSourceName: "PostTable" }); }

3. `amplify push` 

### GraphQL schema(s)

<details>

```graphql
type Post @model {
  title: String
}

type Mutations {
  promotePost(): Post
}

Log output

``` # Put your logs below this line ⠙ Building resource api/myapiBe careful when using @auth directives on a field in a root type. @auth directives on field definitions use the source object to perform authorization logic and the source will be an empty object for fields on root types. Static group authorization should perform as expected. 🛑 Error: Skipping override due to VMError: Cannot find module 'fs' ✔ Successfully pulled backend environment dev from the cloud. ⠙ Building resource api/myapiBe careful when using @auth directives on a field in a root type. @auth directives on field definitions use the source object to perform authorization logic and the source will be an empty object for fields on root types. Static group authorization should perform as expected. 🛑 Error: Skipping override due to VMError: Cannot find module 'fs' ```

Additional information

No response

[josefaidt]

Hey @nikname :wave: thanks for raising this! I was able to successfully reproduce this behavior using the provided reproduction steps. Thank you for providing those details! The root cause here is similar to https://github.com/aws-amplify/amplify-cli/issues/9063, however I'll mark this as a non-duplicate bug due to the different workflow.

As mentioned in the docs, it should be possible to write our VTL templates in a separate file. As a workaround, please try defining the VTL templates as strings inside the overrides.ts file.

Marking as a bug 🙂

[josefaidt]

Hey @nikname :wave: there was a bit of confusion on my part with this docs link I provided. Under the "VTL Resolvers" section it walks us through creating a custom CDK resource rather than _overriding` the GraphQL Resource. In a custom CDK resource these fs ops are permitted and we should be able to add VTL templates using the example you provided. Can you try those steps and see if that mitigates this issue?

[MikeG96]

Hello, I have the same problem but trying override OpenDomainName, I have Windows 10

import {
  AmplifyApiGraphQlResourceStackTemplate,
  getProjectInfo,
} from "@aws-amplify/cli-extensibility-helper";

export function override(resources: AmplifyApiGraphQlResourceStackTemplate) {
  const { projectName, envName } = getProjectInfo();

  // Override OpenSearch Resource Configuration
  resources.opensearch.OpenSearchDomain.domainName = `${projectName}-op-${envName}`;
}

[blanchma]

Same issue overriding storage.

[KeiSugiyasu]

Similar issue overriding opensearch.OpenSearchStreamingLambdaFunction.

⠴ Building resource api/*** Your instance type for OpenSearch is t2.small.elasticsearch, you may experience performance issues or data loss. Consider reconfiguring with the instructions here https://docs.amplify.aws/cli/graphql/search-and-result-aggregations/#set-up-opensearch-for-production-environments
🛑 Error: Skipping override due to VMError: Cannot find module 'fs'

Overrides functionality is not implemented for this category
✔ Successfully pulled backend environment *** from the cloud.
⠴ Building resource api/*** Your instance type for OpenSearch is t2.small.elasticsearch, you may experience performance issues or data loss. Consider reconfiguring with the instructions here https://docs.amplify.aws/cli/graphql/search-and-result-aggregations/#set-up-opensearch-for-production-environments
🛑 Error: Skipping override due to VMError: Cannot find module 'fs'