Djangoでページネーションを簡単に実装する方法（ListView + Bootstrap対応）

from django.views import generic
from .models import SnsBoardModel

class BoardView(generic.ListView):
    model = SnsBoardModel
    template_name = "board.html"
    paginate_by = 5  # ← 1ページに表示する件数

<nav aria-label="Page navigation">
  <ul class="pagination">
    <!-- 前へ -->
    {% if page_obj.has_previous %}
      <li class="page-item">
        <a class="page-link" href="?page={{ page_obj.previous_page_number }}" aria-label="Previous">
          <span aria-hidden="true">前</span>
        </a>
      </li>
    {% else %}
      <li class="page-item disabled">
        <span class="page-link" aria-hidden="true">前</span>
      </li>
    {% endif %}

    <!-- ページ番号 -->
    {% for num in page_obj.paginator.page_range %}
      <li class="page-item {% if page_obj.number == num %}active{% endif %}">
        <a class="page-link" href="?page={{ num }}">{{ num }}</a>
      </li>
    {% endfor %}

    <!-- 次へ -->
    {% if page_obj.has_next %}
      <li class="page-item">
        <a class="page-link" href="?page={{ page_obj.next_page_number }}" aria-label="Next">
          <span aria-hidden="true">次</span>
        </a>
      </li>
    {% else %}
      <li class="page-item disabled">
        <span class="page-link" aria-hidden="true">次</span>
      </li>
    {% endif %}
  </ul>
</nav>