How to update a collection's upload field?

Hi !

I'm struggling to upload an image to the

of my collection via

in an

Hook

I couldn't find any examples in the docs, and this part is invalid, but have no idea how to fix it

Any pointers appreciated !

Thanks

Invalid update field :

image: path.resolve(__dirname, filePath)

Error

[15:04:55] ERROR (payload): ValidationError: The following field is invalid: image

Here is the

logic

const post = await payload.update({
     collection: "pdfs", // required
     id: doc.id, // required
     data: {
        title: "Updated Title",
        alt: "Updated Alt",
        image: path.resolve(__dirname, filePath),
       },
     depth: 2,
     locale: "en",
     user: "Admin",
     overrideAccess: true,
     showHiddenFields: true,
     context: {
      // set a flag to prevent from running again
       triggerAfterChange: false,
      },
  });

The array field in my pdf collection

{
     name: "image",
     type: "upload",
     relationTo: "images",
},
  

How to update a collection's upload field?

hi so I eventually understood that i had to create the image before updating ! duh

    const filePath = '/home/node/app/src/uploads/pdfs/' + doc.filename + 0 + '.png';
    fs.writeFileSync(filePath, pngPage[0].content);
    payload.logger.info("Generate pdf images success");
    const createdImage : Image = await payload.create({
        collection: "images", // required
        data: {
           title: "title",
       alt : "alt"
        },
        locale: "en",
        user: "Admin",
        overrideAccess: true,
        showHiddenFields: false,
        disableVerificationEmail: true,
        filePath: path.resolve(__dirname, filePath),
    });


    const post = await payload.update({
        collection: "pdfs", // required
        id: doc.id, // required
        data: {
            title: "Updated Title",
            alt: "Updated Alt",
            img: createdImage.id,
        },
        depth: 2,
        locale: "en",
        user: "Admin",
        overrideAccess: true,
        showHiddenFields: true,
        context: {
            // set a flag to prevent from running again
            triggerAfterChange: false,
        },
    });

it kind of works, but at first document save i get

app-payload-1  | TypeError: Cannot read properties of null (reading 'toJSON')
app-payload-1  |     at deleteByID (/home/node/app/node_modules/payload/src/collections/operations/deleteByID.ts:111:30)
app-payload-1  |     at processTicksAndRejections (node:internal/process/task_queues:95:5)
app-payload-1  |     at async Promise.all (index 0)
app-payload-1  | [nodemon] app crashed - waiting for file changes before starting...

I don't understand what's wrong? what's triggering the delete operation?

it was caused by a hook in my images collections