Refactoring presenter - https://forum.upcase.com/t/is-there-a-good-way-to-clean-up-this-nested-content-tag-in-this-presenter/6422

ticket_report_presenter.rb

class TicketReportPresenter
  def ticket_report
    return if @model.tickets.empty?
    safe_join([header, table])
  end
  
  def header
    content_tag(:h4, "Users have tickets")
  end
  
  def table
    content_tag(:table, safe_join([table_header, table_body]))
  end
  
  def table_header
    content_tag(:thead) do
      safe_join([
        content_tag(:th, "User Email"),
        content_tag(:th, "Reason(s)")
      ])
    end
  end
  
  def table_body
    content_tag(:tbody, table_rows)
  end
  
  def table_rows
    tickets = @model.unpayable_tickets.map { |ticket| table_row(ticket) }
    safe_join(tickets)
  end
  
  def table_row(ticket)
    content_tag(:tr) do
      safe_join([
        content_tag(:td, ticket.email),
        content_tag(:td, reasons_list(ticket.reasons))
      ])
    end
  end
  
  def reasons_list(reasons)
    reasons = reasons.map { |reason| reason_list_item(reason) }
    content_tag(:ul, safe_join(reasons))
  end
  
  def reason_list_item(reason)
    content_tag(:li, reason)
  end
end

awesome implementation!