How to add data attribute in Rails form select tag?

Question

I found this Bootstrap Select project and its gem for Rails. I want to implement search in the select tag.

I do inspect element and here is the HTML source:

Answer 1

if you are passing a block to the select, you need to pass {} two times, e.g.

    => f.select :to_user_id, {}, {}, data: { placeholder: "Choisis des invités..." }, class: "chosen-image" do
      - User.find_each do |user|
        option(data-img-src="#{user_image_url_for(user)}" value="#{user.id}")
          = user.first_name