How to programmatically call macros?

Questions & Help Questions
,
11

you are passing raw value, but then …

Look that:

quote do
  Schema.User
end

returns:

{:__aliases__, [alias: false], [:Schema, :User]}

so you can do:

defmodule Document.InputObjects.Schema do
  # …

  defp filter_name({:__aliases__, [alias: false], list}) do
    list
    |> List.delete("Schema")
    |> Enum.join()
    |> Macro.underscore()
    |> append("_filter")
    |> String.to_atom()
  end

  defp append(string, suffix), do: string <> suffix

  # …
end

Secondly code is much cleaner when you are writing it top → bottom instead of bottom → top. It’s faster to read it.

Finally make sure you are using Elixir builtin code formatter:
https://hexdocs.pm/mix/master/Mix.Tasks.Format.html