Setting relationship field with multiple relationTo collections via beforeChange hook.

[wrobson-lllow]

I have a readOnly relationship field "createdBy" that looks like the following:

const CreatedByField: Field = {
  name: "createdBy",
  type: "relationship",
  relationTo: ["users", "api-keys"],
  hasMany: false,
  admin: {
    readOnly: true,
    position: "sidebar",
  },
};

My beforeChange hook to add the createdBy field looks like:

const AddCreatedBy: CollectionBeforeChangeHook = async ({ data, req, operation }) => {
    if (operation === "create" && req.user){
        data.createdBy = req.user.id
    }
    return data;
}

If I remove the readOnly and the beforeChange hook then add createdBy manually the data looks like:

{
   createdBy: {
      value: user
   }
}

instead of {createdBy: user} when I have relationTo: "users" instead of relationTo: ["users", "api-keys"]

My hook as is works for when I have relationTo: "users" instead of relationTo: ["users", "api-keys"]
but with relationTo: ["users", "api-keys"] I get a validation error. If a change the hook to update createdBy.value instead of createdBy I get an undefined error for createdBy.value.

Does anyone knopw what I am doing wrong, it would be ideal to have the createdBy field relate to either the users or api-keys collection and according to the relationship field docs I should be able to: relationship docs

[wrobson-lllow]

I found the answer here: https://payloadcms.com/docs/fields/relationship#has-one-polymorphic

My beforeChange hook now looks like:

const AddCreatedBy: CollectionBeforeChangeHook = async ({
  data,
  req,
  operation,
}) => {
  if (operation === "create" && req.user) {
    const relationTo =
      req.user._strategy === "local-jwt" ? "users" : "api-keys";
    data.createdBy = { relationTo: relationTo, value: req.user.id };
  }
  return data;
};