用于生成页码以进行分页的寻呼机
py-paginator的Python项目详细描述
PY分页器
paginator生成分页页码
烧瓶框架的使用示例
- app.py：
fromflaskimportFlask,request,render_templatefrompy_paginatorimportPaginatorapp=Flask(__name__)app.jinja_env.add_extension('jinja2.ext.do')@app.route('/')defhome():page=int(request.args.get('page',1))limit=20records_count=get_records_count()# get records count from storagepaginator=Paginator(total_items=records_count,item_limit=limit,curr_page=page)records=get_records(limit=paginator.item_limit,offset=paginator.item_offset)# get records from storagereturnrender_template('home.html',records=records,paginator=paginator)
这里可以在数据库查询中使用paginator.item_limit和paginator.item_offset来应用限制。paginator对象可以在模板中用于创建分页链接。
- templates/macros.html：
{#
:paginator: Paginator object
:endpoint: flask request endpoint
:pager: If True it will show a pager instead of numbered pagination
- you can also pass further arguments that will be passed into `url_for()` of every link.
#}
{% macro render_pagination(paginator, endpoint=request.endpoint, pager=False) %}
{% if paginator.has_pages %}
{% do kwargs.update(request.args) %}
{% do kwargs.pop('page', None) %}
<navaria-label="Page navigation">
{% if pager %}
{% set pager = paginator.get_pager() %}
<ulclass="pager"><liclass="previous{% if not paginator.has_prev %} disabled{% endif %}">
{% do kwargs.update({'page': pager.prev}) %}
<ahref="{% if paginator.has_prev %}{{ url_for(endpoint, **kwargs) }}{% else %}#{% endif %}"><spanaria-hidden="true">«</span> Prev</a></li><liclass="next{% if not paginator.has_next %} disabled{% endif %}">
{% do kwargs.update({'page': pager.next}) %}
<ahref="{% if paginator.has_next %}{{ url_for(endpoint, **kwargs) }}{% else %}#{% endif %}">Next <spanaria-hidden="true">»</span></a></li></ul>
{% else %}
<ulclass="pagination">
{% for page_type, page_num in paginator.get_pages() %}
{% do kwargs.update({'page': page_num}) %}
{% if page_type == 'prev' %}
{% if page_num %}
<li><ahref="{{ url_for(endpoint, **kwargs) }}"aria-label="Previous"><spanaria-hidden="true">«</span></a></li>
{% else %}
<liclass="disabled"><span><spanaria-hidden="true">«</span></span></li>
{% endif %}
{% elif page_type == 'next' %}
{% if page_num %}
<li><ahref="{{ url_for(endpoint, **kwargs) }}"aria-label="Next"><spanaria-hidden="true">»</span></a></li>
{% else %}
<liclass="disabled"><span><spanaria-hidden="true">»</span></span></li>
{% endif %}
{% elif page_type == 'ellip' %}
<liclass="disabled"><span><spanaria-hidden="true">…</span></span></li>
{% elif page_type == 'curr' %}
<liclass="active"><span>{{ page_num }}</span></li>
{% else %}
<li><ahref="{{ url_for(endpoint, **kwargs) }}">{{ page_num }}</a></li>
{% endif %}
{% endfor %}
</ul>
{% endif %}
</nav>
{% endif %}
{% endmacro %}
- templates/home.html：
{% from "macros.html" import render_pagination with context %}
<h1>Total Records: {{ paginator.total_items }}</h1><h2>Total Pages: {{ paginator.total_pages }}</h2>
{% for record in records %}
<p>{{ loop.index + paginator.item_offset }} - {{ record.field_name }}</p>
{% else %}
<p>No Records found.</p>
{% endfor %}
{{ render_pagination(paginator) }}
欢迎加入QQ群-->： 979659372
