Django开发笔记五

Django开发笔记一

Django开发笔记二

Django开发笔记三

Django开发笔记四

Django开发笔记五

Django开发笔记六

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>