invoices_controller.rb

class InvoicesController < ApplicationController
  # ...

  def create
    form = InvoiceForm.new(params)
    result = CreateInvoice.new(current_user, form).call
    @invoice = result.invoice
    if result.success?
      redirect_to @invoice
    else
      render :edit, error: result.error
    end
  end
  
  # ...
end

Thanks for the great article and gists on how you use services.

I'm confused on how result.invoice is wired up. In other examples, you've shown a Success class with a data attribute and an attr_reader. Assuming you're using that in this example, where does the invoice method come from?

Or am I just reading too much into a simple example? :)