app/views/shares/coop/edit_interest_rate.html.haml
%h2 Adjust interest rate
= form_for(:organisation, :url => update_interest_rate_shares_path, :method => :put) do |form|
%p
= form.label :interest_rate, "New interest rate"
= form.text_field :interest_rate, :class => 'inline'
\%
%p
= form.submit "Save"