On a Content model have an attribute named slug. When creating a new record, I want to use a helper to populate this field, but on an existing record I want to use the value from the database.

Currently I have:

<%- if @content.new_record? -%>
  <%= f.text_field :slug, :value => "#{generate_slug(6)}" %>
<%- else %>
  <%= f.text_field :slug %>
<%- end %>

But that seems a bit verbose. Is this the best way, or is there no other way? (Rails newb just trying to find the "Rails way" on issues I'm unsure of)

Edit

I should note that the helper is currently in /app/helpers/application_helper.rb