Django Pagination Snippet Bootstap 4

pagination_snippet.html

<nav aria-label="Page navigation example">
  <ul class="pagination">

    {% if page_obj.has_previous %}
      <li class="page-item">
        <a href="?page={{ page_obj.previous_page_number }}&order_by={{ order_by }}&direction={{ direction }}"
           class="page-link">
          <span aria-hidden="true">&laquo;</span>
          <span class="sr-only">Previous</span>
        </a>
      </li>
    {% else %}
      <li class="disabled">
        <a class="page-link" href="#">
          <span aria-hidden="true">&laquo;</span>
          <span class="sr-only">Previous</span>
        </a>
      </li>
    {% endif %}

    {% if page_obj.number|add:'-4' > 1 %}
      <li class="page-item">
        <a href="?page={{ page_obj.number|add:'-5' }}&order_by={{ order_by }}&direction={{ direction }}"
           class="page-link">&hellip;</a>
      </li>
    {% endif %}

    {% for i in page_obj.paginator.page_range %}
      {% if page_obj.number == i %}
        <li class="page-item active">
          <a class="page-link" href="#">{{ i }} <span class="sr-only">(current)</span></a>
        </li>
      {% elif i > page_obj.number|add:'-5' and i < page_obj.number|add:'5' %}
        <li class="page-item">
          <a href="?page={{ i }}&order_by={{ order_by }}&direction={{ direction }}" class="page-link">{{ i }}</a></li>
      {% endif %}
    {% endfor %}

    {% if page_obj.paginator.num_pages > page_obj.number|add:'4' %}
      <li class="page-item">
        <a href="?page={{ page_obj.number|add:'5' }}&order_by={{ order_by }}&direction={{ direction }}"
           class="page-link">&hellip;</a>
      </li>
    {% endif %}

    {% if page_obj.has_next %}
      <li class="page-item">
        <a href="?page={{ page_obj.next_page_number }}&order_by={{ order_by }}&direction={{ direction }}"
           class="page-link">
          <span aria-hidden="true">&raquo;</span>
          <span class="sr-only">Next</span>
        </a>
      </li>
    {% else %}
      <li class="disabled page-item">
        <a class="page-link" href="#">
          <span aria-hidden="true">&raquo;</span>
          <span class="sr-only">Next</span>
        </a>
      </li>
    {% endif %}

  </ul>
</nav>