Django开发笔记五

1、页面继承

定义base.html:

<!DOCTYPE html>
<html>
{% load staticfiles %}
<head>
.....
<body>
{% block content %}
{% endblock %}
<div class="footer">
....
</div>
</body>
</html>

index.html:

{% extends 'base.html' %}
{% block title %}<title>在线学习系统--首页</title>{% endblock %}
{% load staticfiles %}
{% block content %}
........
{% endblock %}

2、分页、排序

分页插件：https://github.com/jamespacileo/django-pure-pagination#settings

settings.py:

INSTALLED_APPS = [
......
    'pure_pagination',  # 注册分页app
]

# 分页
PAGINATION_SETTINGS = {
    'PAGE_RANGE_DISPLAYED': 10,
    'MARGIN_PAGES_DISPLAYED': 2,

    'SHOW_FIRST_PAGE_WHEN_INVALID': True,
}

views.py:

from pure_pagination import Paginator, EmptyPage, PageNotAnInteger

def video_list(request):
    video_list = Video.objects.all()
    video_page_count = video_list.count();
    # 分页功能
    try:
        page = request.GET.get('page', 1)  # 获取当前页码,如果没有默认1
    except PageNotAnInteger:  # 如果获取页码出错，默认1
        page = 1

    tmp = Paginator(video_list, 2, request=request)  # 执行分页函数，参数1数据库的数据，参数2显示多少条数据，参数3request
    video_page = tmp.page(page)  # 返回一个，包含了分页数据和分页导航的对象
    return render(request, "video_list.html", {"video_page": video_page,
                                               "video_page_count": video_page_count})

html:

        <div class="list-item-title">视频列表</div>
        <div class="list-item-content clearfix">
            {% for video in video_page.object_list %}
                <div class="item">
                    <a href="">
                        <img src="{{ MEDIA_URL }}{{ video.image }}">
                        <p class="title">{{ video.name }}</p>
                    </a>
                </div>
            {% endfor %}

        </div>

   {% load i18n %}
    <div class="pagination">
        {% if video_page.has_previous %}
            <a href="?{{ video_page.previous_page_number.querystring }}"
               class="prev">‹‹ {% trans "previous" %}</a>
        {% else %}
            <span class="disabled prev">‹‹ {% trans "previous" %}</span>
        {% endif %}
        {% for page in video_page.pages %}
            {% if page %}
                {% ifequal page video_page.number %}
                    <span class="current page">{{ page }}</span>
                {% else %}
                    <a href="?{{ page.querystring }}" class="page">{{ page }}</a>
                {% endifequal %}
            {% else %}
                ...
            {% endif %}
        {% endfor %}
        {% if video_page.has_next %}
            <a href="?{{ video_page.next_page_number.querystring }}" class="next">{% trans "next" %} ››</a>
        {% else %}
            <span class="disabled next">{% trans "next" %} ››</span>
        {% endif %}
    </div>

3、ModelForm提交、验证