/notes/list/ 处的 TemplateSyntaxError 添加需要 2 个参数，提供 1 个

Question

我正在尝试在我的笔记列表中添加分页，但我遇到了 2 个参数错误。我不知道修复它。大家能告诉我怎么解决吗？

notes/views.py

class NotesListView(LoginRequiredMixin,ListView):
    login_url = '/accounts/login/'
    model = Notes
    context_object_name = 'notes_data'
    paginate_by = 3
    def get_queryset(self):
        return Notes.objects.filter(create_date__lte=timezone.now()).order_by('-create_date')

notes/notes_list.html

{% if is_paginated %}
        {% if page_obj.has_previous %}
            <a class ='btn btn-warning'href='?page=1'>first</a>
            <a class ='btn btn-warning'href="?page={{page_obj.previous_page_number}}">Previous</a>   
        {% endif %}
        
        {% for num in page_obj.paginator.page_range %}
            {% if num == page_obj.number  %}
                <a class ='btn btn-warning'href="?page={{num}}">{{num}}</a>
            {% elif num > page_obj.number|add: '-1' and num < page_obj.number|add: '1' %}
                <a class ='btn btn-success'href="?page={{num}}">{{num}}</a>
            {% endif %}
        {% endfor %}

        {% if page_obj.has_next %}
            <a class ='btn btn-warning'href="?page={{page_obj.next_page_number}}">Next</a>
            <a class ='btn btn-warning'href="?page={{page_obj.paginator.num_pages}}">Last</a>   
        {% endif %}
    {% endif %}

Answer 1

删除 add: 和 '1' 之间的空格

page_obj.number|add: '-1' and num < page_obj.number|add: '1'


page_obj.number|add:'-1' and num < page_obj.number|add:'1'