flask分页宏增加更多参数

背景：我正在开发一个博客，核心的两个model是文章和文章类别。

现在想要实现的功能是：点击一个文章类别，以分页的形式显示这个文章类别下的所有文章，类似这种效果。

参考的书中分页宏只接受页数这一个参数，经过尝试，成功给分页宏添加了文章类别参数，实现了上述功能。

posts.html

html 复制代码

{% extends "public/base.html" %}
{% import "public/macros.html" as macros %}

{% block content %}
    <div class="row" style="margin-top: 20px;">
        <div class="col-sm-4">
            {% include "public/categories.html" %}
        </div>
        {% if posts %}
            <div class="col-sm-8">
                {% include "public/_posts.html" %}
            <div style="text-align: center; margin-top: 20px;">
                {% if category %}
                    {{  macros.pagination_widget(pagination, '.posts', category.id) }}
                {% else %}
                    {{  macros.pagination_widget(pagination, '.posts', 0) }}
                {% endif %}
            </div>
        </div>
        {% endif %}
    </div>
{% endblock %}

关键代码

macros.html

python 复制代码

{% macro pagination_widget(pagination, endpoint, category_id) %}
        <ul class="pagination justify-content-center">
            <li {% if not pagination.has_prev %} class="page-item disabled" {% else %} class="page-item" {% endif %}>
                <a class="page-link" href="{% if pagination.has_prev %}{{ url_for(endpoint,
                page = pagination.page - 1, category_id = category_id, **kwargs) }}{% else %}#{% endif %}">
                Previous
                </a>
            </li>
                    {% for p in pagination.iter_pages() %}
                        {% if p %}
                            {% if p == pagination.page %}
                            <li class="page-item active">
                            <a class="page-link" href="{{ url_for(endpoint, page = p, category_id = category_id, **kwargs) }}">{{ p }}</a>
                            </li>
                            {% else %}
                            <li class="page-item">
                            <a class="page-link" href="{{ url_for(endpoint, page = p, category_id = category_id, **kwargs) }}">{{ p }}</a>
                            </li>
                            {% endif %}
                        {% else %}
                        <li class="page-item disabled"><a class="page-link" href="#">...</a></li>
                        {% endif %}
                    {% endfor %}
            <li {% if not pagination.has_next %} class="disabled page-item" {% else %} class="page-item"{% endif %}>
                <a class="page-link" href="{% if pagination.has_next %}{{ url_for(endpoint,
                page = pagination.page + 1, category_id = category_id, **kwargs) }}{% else %}#{% endif %}">
                Next
                </a>
            </li>
        </ul>
{% endmacro %}

关键代码

routes.py

python 复制代码

@app.route('/posts', methods=['GET', 'POST'])
@app.route('/posts/<int:category_id>', methods=['GET', 'POST'])
def posts(category_id=0):
    page = request.args.get('page', 1, type=int)
    if 0 != category_id:
        category = Category.query.get_or_404(category_id)
        pagination = Post.query.with_parent(category).order_by(Post.timestamp.desc()).paginate(page=page, per_page=10)
    else:
        category = None
        pagination = Post.query.order_by(Post.timestamp.desc()).paginate(page=page, per_page=10)
    posts = pagination.items
    categories = Category.query.all()
    return render_template('public/posts.html', posts=posts, pagination=pagination, categories=categories, category=category)

关键代码