<%= form_tag('./check_availability') do %>
<%= select_tag "supplier_id", options_from_collection_for_select(@suppliers, "id", "name", @selected_supplier.try(:id)) %>
<%= text_area_tag "codes", @codes_to_check, rows: 20, columns: 50 %>
<%= submit_tag "Check" %>
<%= submit_tag "Delete Items" %>
<% end %>
<% if controller.action_name == 'delete_items' %>
Delete successful
<% if @not_deleted_items.length > 0 %>
Not deleted items
<% @not_deleted_items.each do |code| %>
<%= code %>
<% end %>
<% end %>
<% else %>
In database: <%= @items.length %>, in file: <%= @codes_to_check_array.length %>
Not in database (<%= @missing_from_database.length %>):
<% @missing_from_database.each do |code| %>
<%= code %>
<% end %>
Not in file (<%= @missing_from_codes.length %>):
<% @missing_from_codes.each do |code| %>
<%= code %>
<% end %>
<% end %>