Sure! Just use a resolver:

field :profile_name, non_null(:string), resolve: fn parent, _, _ ->
  {:ok, Map.get(parent, :name)}
end

If this is a common pattern you can create a little helper function:

def key(k) do
  fn parent, _, _ -> {:ok, Map.get(parent, k)} end
end

field :profile_name, non_null(:string), resolve: key(:name)

I noticed that you’re using this for aliasing the database columns. In case you’re using Ecto is even easier to do this by letting Ecto take care of the column alias in the field definition by using the source argument like this:

field(:name, :string, source: :profilename)

where :profilename is the column in the database while the :name is the one exposed by Ecto to Absinthe.