使用Django搭建网站实现商品分页功能

装好Django，写好index.html后，可以展示网页了。但是这只是静态页面，没有关联数据库，也不能分页展示商品信息。本节连接mongodb数据库（事先已准备好数据），从中取出几十条商品信息，每页展示4个商品信息，并具有翻页功能，做好的页面效果大致如下：

开始代码：

1、在settings.py（项目名称目录下）中，增加2段代码，分别是static文件夹位置和连接mongodb的代码：

STATIC_URL = '/static/'
STATICFILES_DIRS = (os.path.join(BASE_DIR,'static'),)  # 指定static文件夹位置

from mongoengine import connect
connect('ganji', host='127.0.0.1', port=27017)  # 连接ganji数据库

2、在models.py（本APP目录下）中，代码：

from django.db import models
from mongoengine import *
 
# Create your models here.
 
# 创建帖子信息类，继承自mongoengine的文件类<br data-filtered="filtered">class PostInfo(Document):  
  area = ListField(StringField())
  title = StringField()
  cates = ListField(StringField())
  price = StringField()
 
  pub_date = StringField()   # 数据集里面所有的字段都要有，就算不用也得列出来
  url = StringField()
  look = StringField()
  time = IntField()
  cates2 = StringField()
 
  meta = {'collection':'goods_info'}  # 定位好是goods_info数据集

3、在views.py（本APP目录下）中，代码：

from django.shortcuts import render
from sample_blog.models import PostInfo  # 导入已写好的数据结构
from django.core.paginator import Paginator # 导入分页器
 
# Create your views here.
def index(request):
  limit = 4 # 每页放几条帖子
  all_post_info = PostInfo.objects[:20] # 取前20个帖子的数据
  paginatior = Paginator(all_post_info, limit)  # 用分页器分页
  page_num = request.GET.get('page', 1) # 取request中的页码，取不到就为1
  loaded = paginatior.page(page_num) # 取page_num那一页的数据，一般是4条
 
  context = {
    # 首条固定的帖子信息
    'title': '三星 A5 白色',
    'des': '【图】三星 A5 白色 没有打开过 - 朝阳望京台式机/配件 - 北京58同城',
    'price': '1500',
    'area': ["朝阳", "望京"],
    'tag1': "北京二手市场",
    'tag2': "北京二手台式机/配件",
 
    # 每页更新的帖子信息
    'one_page_post': loaded
  }
  return render(request, 'index.html',context)

4、修改index.html文件，主要修改了有文字标注的部分：

<div class="posts">
       <h1 class="content-subhead">Pinned Post</h1>
 
       <!-- A single blog post -->
       <section class="post">
         <header class="post-header">
           <img class="post-avatar" alt="Tilo Mitra's avatar" height="48" width="48" src="{% static 'img/common/tilo-avatar.png' %}">





<!-- 修改了{{title}}等 -->
           <h2 class="post-title">{{ title }}</h2>
 
           <p class="post-meta">
             地区 <a href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" class="post-author">{{ area }}</a> under <a class="post-category post-category-design" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{ tag1 }}</a> <a class="post-category post-category-pure" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{tag2}}</a>
           </p>
         </header>
 
         <div class="post-description">
           <p>
             {{ des }}|价格：{{ price }}
           </p>
         </div>
       </section>
     </div>
 
     <div class="posts">
       <h1 class="content-subhead">Recent Posts</h1><!-- 增加for循环，将one_page_post值带入 -->
       {% for item in one_page_post %}
         <section class="post">
           <header class="post-header">
             <img class="post-avatar" alt="Eric Ferraiuolo's avatar" height="48" width="48" src="{% static 'img/common/ericf-avatar.png' %}">
 
             <h2 class="post-title">{{ item.title }}</h2>
 
             <p class="post-meta">
               地区 <a class="post-author" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{ item.area }}</a>分类<!-- 再增加一个for循环，把cates里的元素都展示出来 -->
               {% for cate in item.cates %}
                  <a class="post-category post-category-pure" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{ cate }}</a>
               {% endfor %}
             </p>
           </header>
 
           <div class="post-description">
             <p>
               {{ item.title }}|价格：{{ item.price }}
             </p>
           </div>
         </section>
       {% endfor %}
 
     </div>



<!-- 增加本段div，实现页面底部可翻页 -->
      <div align="center">
       {% if one_page_post.has_previous %}
         <a href="?page={{ one_page_post.previous_page_number }}" rel="external nofollow" >< Pre</a>
       {% endif %}
         <span> {{ one_page_post.number }} of {{ one_page_post.paginator.num_pages }} </span>
       {% if one_page_post.has_next %}
         <a href="?page={{ one_page_post.next_page_number }}" rel="external nofollow" >Next ></a>
       {% endif %}
      </div>

5、附上urls.py（项目名称目录下）文件，本节中并没有修改，但也备注上：

from django.contrib import admin
from django.urls import path
from sample_blog.views import index
 
urlpatterns = [
  path('admin/', admin.site.urls),
  path('index/', index),
]

以上步骤完成后，启动服务（python manage.py runserver），访问http://127.0.0.1:8000/index/即可看到效果。

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持三水点靠木。