<div class="dropdown is-hoverable">
    <div class="dropdown-trigger button">
        <p>Change shelf</p>
        <span class="icon icon-arrow-down"></span>
    </div>
    <div class="dropdown-menu">
        <ul class="dropdown-content">
            {% for shelf in request.user.shelf_set.all %}
            {% if shelf.identifier != current.identifier %}
            <li>
                <form class="dropdown-item pt-0 pb-0" name="shelve" action="/shelve/" method="post">
                    {% csrf_token %}
                    <input type="hidden" name="book" value="{{ book.id }}">
                    <input type="hidden" name="shelf" value="{{ shelf.identifier }}">
                    <button class="button is-small" type="submit">{{ shelf.name }}</button>
                </form>
            </li>
            {% endif %}
            {% endfor %}
            <hr class="navbar-divider">
            <li>
                <form class="dropdown-item pt-0 pb-0" name="shelve" action="/unshelve/" method="post">
                    {% csrf_token %}
                    <input type="hidden" name="book" value="{{ book.id }}">
                    <input type="hidden" name="shelf" value="{{ current.id }}">
                    <button class="button is-small is-danger" type="submit">Unshelve</button>
                </form>
            </li>
        </ul>
    </div>
</div>