[Rollup] Packaging with Rollup messes up exports

[hidde-vb]

Prerequisites

• I have written a descriptive issue title

Mongoose version

6.11.2

Node.js version

18.20.4

MongoDB version

6.8.0

Operating system

macOS

Operating system version (i.e. 20.04, 11.3, 10)

No response

Issue

We are depending heavily on mongoose on our backend. We're having an issue trying to reuse some of the models in a handler with a seperate rollup config, which should be deployed on lambda.

The resulting single transpiled file should contain all dependencies and export a handler function.

However, when introducing mongoose in the code as a dependency, the exports can not be found anymore. When splitting the mongoose code into a seperate chunk, these files are also undefined.

Error when single bundle file:

"errorType": "Runtime.HandlerNotFound",
"errorMessage": "sms-school-sync.handler is undefined or not exported",

Error when mongoose is bundled seperately:

"errorType": "TypeError",
"errorMessage": "Cannot read properties of undefined (reading 'Schema')",

We're currently experiencing this only with mongoose. For example, bundling Axios in the same file works fine.

Rollup.config.js:

module.exports = {
    // A list of seperate handlers
    input: files, 
    output: {
        dir: './dist-lambda',
        format: 'cjs',
        sourcemap: false,
        # Seperate mongoose in its own chunk
        manualChunks: id => (id.includes('mongoose') ? 'mongoose' : 'index'),
    },
    plugins: [
        nodeResolve(),
        commonjs(),
        json(),
        typescript({
            tsconfig: `${PATH}/tsconfig.json`,
        }),
    ],
    external: builtinModules,
};

tsconfig.json:

{
    "compilerOptions": {
        "target": "ESNext",
        "module": "ESNext",
        "moduleResolution": "node",
        "rootDir": "../../../",
        "allowJs": true,
        "outDir": "./../../../dist-lambda",
        "preserveConstEnums": true,
        "sourceMap": true,
        "esModuleInterop": true,
        "skipLibCheck": true,
        "strict": true,
        "forceConsistentCasingInFileNames": true,
        "isolatedModules": true,
    },
}

We've tried many different approach but the same problem keeps popping up. Note that our code contains both TS and JS, hence the multiple plugins in our rollup config.

Thanks in advance!

[vkarpov15]

Can you try upgrading to Mongoose 8.4.0, at least locally to see if that fixes the issue? We fixed some rollup bundling issues in #14577 that may help.