1.添加分页

添加分页在Django中使用自带分页器paginator

1.1 配置setting

settings中配置分页数量

# 每页显示记录条数
PER_PAGE_NUMBER = 8

1.2 配置views

1. 完成分页栏
2. 使用paginator创建对象，返回选中条数

from django.shortcuts import render
from goodsapp.models import *
from django.core.paginator import Paginator
from netshop import settings
# Create your views here.
# 新增 1 2 3 4 5 这样的分页栏函数
def get_page_range_by_page_and_max_page(page, max_page, num=10):
    min = page-int(num/2)
    min = min if min>1 else 1
    max = min + num - 1
    max = max if max < max_page else max_page
    return range(min, max+1)
# 商品列表页
def index(request,categoryid=2, page_num=1):
    # 1. 获取所有分类
    categoryList = Category.objects.all().order_by('id')

    # 2. 获取当前分类下的所有商品
    goodsList = Goods.objects.filter(category_id = categoryid)

    # 添加参数(对哪个列表分页，每页多少条)
    paginator = Paginator(object_list=goodsList, per_page=settings.PER_PAGE_NUMBER)
    # 获取当前page_num页的数据
    goods_page = paginator.get_page(page_num)

    # 设置传递参数
    context = {
        'categoryList':categoryList,
        'currcategoryid':categoryid,
        'goods_page': goods_page, # 修改获取第几页的数据
        'page_range':get_page_range_by_page_and_max_page(page_num, paginator.num_pages), # 第一个参数是当前页，第二个是总共多少页
        
    }
    return render(request,'goodsapp/index.html',context=context)

1.3 子应用urls配置

# netshop\goodsapp\urls.py
from django.contrib import admin
from django.urls import path,include
from goodsapp import views
urlpatterns = [
    path('',views.index),
    path('category/<int:categoryid>/page/<int:page_num>/',views.index),
]

1.4 templates模板配置

1. 获取views当前页面的显示哪几条数据
2. 添加跳转上下页，直接跳转第几页的功能
3. 当前页面被选中加样式

<!-- netshop\goodsapp\templates\goodsapp\index.html -->
{% extends 'base.html' %}
{% block title %} 商品列表页 {% endblock %}
{% block headercss %}
<style>
    .redA{
        color: red;
        font-size: 26px;
    }
</style>

{% endblock %}
{% block main %}
<div class="classes">
    <ul class="classes-items">
        {% for category in categoryList %}
            <li class="items {% if category.id == currcategoryid %} active {% endif %} ">
                <a href="http://127.0.0.1:8000/category/8">{{category.cname}}</a>
            </li>
        {% endfor %}
    </ul>
</div>
<div class="goods-model">
    <div class="goods-content">
        {% for goods in goods_page %}
            <div class="good">
                <a href="http://127.0.0.1:8000/goodsdetails/4">
                    <img src="{{ goods.getImgUrl }}" width="285px" height="285px">
                    <p class="name">{{ goods.gname }}</p>
                    <div class="price">
                        <i>￥</i>
                        <p class="big">{{ goods.price }}</p>
                        <s>￥{{ goods.oldprice }}</s>
                    </div>
                    <div class="sale">
                        特卖
                    </div>
                </a>
            </div> 
        {% endfor %}
    </div>
</div>

<div id="pager" style="text-align: center; font-size: 16px; overflow: hidden; margin-top: 10px;">
    <!-- 判断是否含有上一页，利用goods_page对象中内置的方法 -->
    {% if goods_page.has_previous%}
        <!-- 跳转到哪个分页 -->
        <a href="/category/{{currcategoryid}}/page/{{goods_page.previous_page_number}}" style="display: inline-block; padding: 5px; margin: 5px;">上一页</a>
    {% endif %}

    {% for pg in page_range %}
        {% if pg == goods_page.number %}
            <strong class="redA">{{pg}}</strong>
        {% else %}
        <a href="/category/{{currcategoryid}}/page/{{pg}}" style="display: inline-block; padding: 5px; margin: 5px;">{{pg}}</a>
        {% endif %}
    {% endfor %}

    <!-- 判断是否含有下一页，利用goods_page对象中内置的方法 -->
    {% if goods_page.has_next %}
        <!-- 跳转到哪个分页 -->
        <a href="/category/{{currcategoryid}}/page/{{goods_page.next_page_number}}" style="display: inline-block; padding: 5px; margin: 5px;">下一页</a>
    {% endif %}

    
    
</div>
{% endblock %}

{% block footerjs %}
<script>
    $('#pager').css({'text-align':'center','font-size':'16px','overflow':'hidden','margin-top':'10px'})
    $('#pager a').css({'display':'inline-block','padding':'5px','margin':'5px'})
</script>
{% endblock %}

base.html

<!-- netshop/templates/base.html -->
<!DOCTYPE html>
<html lang="en">
    {% load static %}
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>{% block title %}{% endblock %}</title>
    <link rel="stylesheet" href="{% static 'css/login.css' %}">
    <link rel="stylesheet" href="{% static 'css/index.css' %}">
    <link rel="stylesheet" href="{% static 'css/detail.css' %}">
    <link rel="stylesheet" href="{% static 'css/carts.css' %}">
    <link rel="stylesheet" href="{% static 'css/reset.css' %}">
    <link rel="stylesheet" href="{% static 'css/mygxin.css' %}">
    <script src="{% static 'js/jquery.min.js.下载' %}"></script>
    <script src="{% static 'js/carts.js' %}"></script>
    {% block headerjs %}{% endblock %}
    {% block headercss %}{% endblock %}
</head>
<body>
    {% include 'top.html' %}
    {% block main %}{% endblock %}
</body>
{% block footer %}{% endblock %}
</html>