app/views/treatment_entries/edit.html.erb
<h1>TreatmentEntry#edit</h1>
<%= form_for (@treatment_entry) do |f| %>
<%= f.label :date %><br/>
<%= f.date_field :date %><br/><br/>
<%= f.label :notes %><br/>
<%= f.text_area :notes %><br/><br/>
<%= f.label :treatment %><br/>
<%= f.select :treatment, TreatmentEntry.treatments.keys.map { |w| [w.humanize, w] } %> <br/>
<%= hidden_field_tag :suffering_id, params[:suffering_id] %><br/>
<%= f.submit %> <!-- Show a alert for the date? if it's in the future -->
<% end %>