Validate_inclusion with dynamic enum

Is the chosen pack somewhere in the changeset?

If yes then with fetch_field you can get the pack, and from that find the right enum to pass in the validation function.

Welcome here !

Hi Lud! Thank for your reply.

The pack is indeed in the changeset.

How would you pass the right enum to validate_inclusion since it expects (as I understand it at least) a static enum.

I would love to pass a function to validate_inclusion that receives the changeset and returns an enum.

I dont think the enum has to be static. I think you can pass any valid enumerable.

So something like that should work:

  def changeset(changeset) do
    changeset
    |> cast(...)
    |> validate_required(...)
    |> validate_parts()
  end

  defp validate_parts(changeset) do
    pack = fetch_field!(changeset, :pack)
    
    changeset
    |> validate_inclusion(:body, Packs.parts_for(pack, :body))
    |> validate_inclusion(:pants, Packs.parts_for(pack, :pants))
  end

It works pefectly, thanks!