app/views/user_lacquers/_add_button.html.erb
<%= link_to "I own this lacquer", user_lacquers_path("user_lacquer[lacquer_id]" => lacquer.id, "user_lacquer[user_id]" => current_user.id), method: :post, class: "btn btn-primary btn-xs", id: "add-button", style:"width: 181px;", remote: true %>