Rails:Template with hooks

Problem

With an auto-generated Rails template, it would be nice if the template could provide hooks in which custom template code could be added.

Environment:

• Rails 8

Workaround: render_hook method

Bij explicitly calling controller.render_hook partial: 'show_buttons' in the template, you can manually specify in the controller render_before and render_after methods if there should be looked for a show_buttons_before and/or a show_buttons_after partial respectively.

# app/controllers/book_controller.rb
class BookController < ApplicationController
  def render_hook(partial:, **options)
    (render_before(partial:, **options) +
      render_to_string(partial: partial, **options) +
      render_after(partial:, **options)
    ).html_safe

    #      return unless options && options[:partial]
    #
    # after_render(partial:, **options)
  end

  # Provide specified partials with render-before partial
  def render_before(partial:, **options)
    if %w[show_buttons].include?(partial)
      # show_buttons_before
      render_to_string(partial: "#{partial}_before", **options)
    else
      ''
    end
  end

  # Provide specified partials with render-after partial
  def render_after(partial:, **options)
    if %w[show_buttons].include?(partial)
      # show_buttons_after
      render_to_string(partial: "#{partial}_after", **options)
    else   
      ''
    end    
  end        
end

# app/views/books/show.html.erb
<%= controller.render_hook partial: 'show_buttons' %>