I have this action, which is not working the way I expected.

create :build do
  accept [:identity_id]
  change set_attribute(:token, Helpers.rand_token())
  change set_attribute(:inserted_at, DateTime.utc_now())
end

token and inserted_at get a fixed value from when the code was evaluated, if I’m not mistaken. But I want to, of course, generate a new value every time the action runs.

I figured out I could accomplish it this way:

create :build do
	accept \[:identity\_id]

	change fn changeset, \_ ->
	 	changeset
		|> Ash.Changeset.change\_attribute(:token, Helpers.rand\_token())
		|> Ash.Changeset.change\_attribute(:inserted\_at, DateTime.utc\_now())
	end
end

It feels a bit clunky. Is there a more straightforward way? I tried to pass a thunk instead of the value directly to set_attribute, but it doesn’t seem to work.

Or are there other ways to do this in a more idiomatic way? To generate values when a resource is created, I mean.