tab/app/views/transactions/new.html.haml

= render 'partials/form_errors', object: @transaction
= form_for @transaction do |f|
  - if current_user.penning
    = f.collection_select :debtor, User.all, :name, :name,
        { selected: @transaction.debtor.try(:name) || current_user.name }, { class: 'select2-selector'}
  - else
    = f.hidden_field :debtor, value: current_user.name
  = f.collection_select :creditor, User.all, :name, :name,
        { selected: @transaction.creditor.try(:name) || User.zeus.name }, { class: 'select2-selector' }
  = f.text_field :message, required: true
  = f.number_field :euros, value: @transaction.amount/100
  .pure-controls
    = f.submit "Send it!"