Hi Samuel,

assuming your input is something like this:

defmodule User do
  defstruct [:id, :name, :role, :age]
end

users_list = [
  %User{id: 1, name: "Alice", role: "user", age: 20},
  %User{id: 2, name: "Bob", role: "admin", age: 30},
  %User{id: 3, name: "John", role: "editor", age: 40}
]

you can do this:

Enum.map(users_list, fn user_struct ->
  Map.take(user_struct, [:id, :name])
end)

with this as an output:

[%{id: 1, name: "Alice"}, %{id: 2, name: "Bob"}, %{id: 3, name: "John"}]

or shorter version:

Enum.map(users_list, &Map.take(&1, [:id, :name]))

with this as an output:

[%{id: 1, name: "Alice"}, %{id: 2, name: "Bob"}, %{id: 3, name: "John"}]

You will have to adjust that code a bit, based on your needs, of course.

I am not sure, if the keys of the map have to be strings or can be atoms like in my example. If those have to be strings, I would use something like this approach:

Enum.map(users_list, fn user_struct ->
  user_struct
  |> Map.take([:id, :name])
  |> Map.new(fn {key, value} ->
    {Atom.to_string(key), value}
  end)
end)

But I feel like this is an XYproblem

You should be able to provide your structs to your views, and convert them to maps there with only the keys you want. Did you try that approach?

Thanks again for your answer Stefan.

You perfectly solved my problem.
To be honest I forgot you could use structs with Enum.map
It’s very easy to use and the code becomes very readable.