3 replies

pass attribute to expression in calculation

I have the following expression in a calculation. This works if the resource has the attribute

starts_at

starts_at

. But how to make this expression generic that any attribute can be used.

  use Ash.Resource.Calculation

  def expression(_opts, _context) do
    expr(fragment("to_char(?,'DD.MM.YYYY')", starts_at))
  end

  use Ash.Resource.Calculation

  def expression(_opts, _context) do
    expr(fragment("to_char(?,'DD.MM.YYYY')", starts_at))
  end

Ive tried passing

:starts_at

:starts_at

opts

opts

but with

arguments: %{field: :starts_at}

arguments: %{field: :starts_at}

. but how it is not clear how to use it

 calculate :display_starts_at,
              :string,
              {Project.Calculations.FormatDatetime, field: :starts_at}

 calculate :display_starts_at,
              :string,
              {Project.Calculations.FormatDatetime, field: :starts_at}