<%= form_for @item || Item.new, url: items_path do |form| %> <%= select_tag "category", options_from_collection_for_select(ItemCategory.all, "id", "name") %> <%= form.text_field :name, label: "Name", class: "name" %> <%= form.text_field :desc, label: "Description", class: "description" %> <%= form.text_field :link, label: "Link", class: "link" %> <%= form.submit "Add Item", class: "add" %> <% end %>