Issue with Forge Custom Field Function in Jira App

[Abhishek Joshi]

I'm facing an issue with our Forge app where the function for a read-only custom field is failing. The function is defined in index.js and referenced in manifest.yml, but the app throws a error during execution. I've tried cleaning, redeploying, and debugging with forge tunnel, but the issue persists.

index.js 

import Resolver from '@forge/resolver';

const resolver = new Resolver();

resolver.define('getAbhi', async (req) => {

  console.log("Function getAbhi was called", req);

  return 'Hello Abhishek';

});

export const handler = resolver.getDefinitions();

manifest.yml

modules:

  jira:customField:

    - key: custom-field-hello-world

      name: custom-field-a

      description: A hello world custom field.

      type: string

      validation:

        expression: value == null || !!value.match("^[A-Za-z]+$")

        errorMessage: The value must consist only of letters

      edit:

        resource: main

    - key: editable-custom-field

      name: editable-custom-field

      description: A editable custom field custom field.

      type: string

      validation:

        expression: value == null || !!value.match("^[A-Za-z]+$")

        errorMessage: The value must consist only of letters

    - key: read-only-custom-field

      name: Read-Only-Custom-Field

      description: A Read Only custom field.

      type: string

      function: getAbhi

      readOnly: true

    - key: time-since-created

      name: time-since-created

      description: A time since created custom field.

      type: string

      readOnly: true

      resource:

        function: main

  function:

    - key: main

      handler: index.handler  # Same handler as above

resources:

  - key: main

    path: static/hello-world/build  # Ensure this path is correct

permissions:

  content:

    styles:

      - unsafe-inline

app:

  runtime:

    name: nodejs22.x

  id: ari:cloud:ecosystem::app/3917f6af-5993-4f31-b023-f10e7f6341bd

Note : I want to fetch the hello abhishek from index.js and want to show to read-only-custom-field . 

[Mercy]

In Forge, a read‑only custom field must reference a function declared under the `function` module in `manifest.yml`, not the resolver definition directly. Your manifest defines `function: getAbhi` inside the custom field, but there’s no corresponding entry under the top‑level `function:` section—only `main` is defined there. The `function` key inside a field must point to a function module key, not a resolver method. To fix this, add a new function module block such as `- key: getAbhi handler: index.handler` under `function:` and keep your resolver definition as is. That tells Forge to expose the resolver’s `getAbhi` handler properly for use by your field.