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使用Django搭建網(wǎng)站實(shí)現(xiàn)商品分頁(yè)功能

 更新時(shí)間:2020年05月22日 10:36:22   作者:djl_djl  
這篇文章主要介紹了使用Django搭建網(wǎng)站實(shí)現(xiàn)商品分頁(yè)功能,文中通過(guò)示例代碼介紹的非常詳細(xì),對(duì)大家的學(xué)習(xí)或者工作具有一定的參考學(xué)習(xí)價(jià)值,需要的朋友可以參考下

裝好Django,寫(xiě)好index.html后,可以展示網(wǎng)頁(yè)了。但是這只是靜態(tài)頁(yè)面,沒(méi)有關(guān)聯(lián)數(shù)據(jù)庫(kù),也不能分頁(yè)展示商品信息。本節(jié)連接mongodb數(shù)據(jù)庫(kù)(事先已準(zhǔn)備好數(shù)據(jù)),從中取出幾十條商品信息,每頁(yè)展示4個(gè)商品信息,并具有翻頁(yè)功能,做好的頁(yè)面效果大致如下:

開(kāi)始代碼:

1、在settings.py(項(xiàng)目名稱目錄下)中,增加2段代碼,分別是static文件夾位置和連接mongodb的代碼:

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

from mongoengine import connect
connect('ganji', host='127.0.0.1', port=27017)  # 連接ganji數(shù)據(jù)庫(kù)

2、在models.py(本APP目錄下)中,代碼:

from django.db import models
from mongoengine import *
 
# Create your models here.
 
# 創(chuàng)建帖子信息類,繼承自mongoengine的文件類<br data-filtered="filtered">class PostInfo(Document):  
  area = ListField(StringField())
  title = StringField()
  cates = ListField(StringField())
  price = StringField()
 
  pub_date = StringField()   # 數(shù)據(jù)集里面所有的字段都要有,就算不用也得列出來(lái)
  url = StringField()
  look = StringField()
  time = IntField()
  cates2 = StringField()
 
  meta = {'collection':'goods_info'}  # 定位好是goods_info數(shù)據(jù)集

3、在views.py(本APP目錄下)中,代碼:

from django.shortcuts import render
from sample_blog.models import PostInfo  # 導(dǎo)入已寫(xiě)好的數(shù)據(jù)結(jié)構(gòu)
from django.core.paginator import Paginator # 導(dǎo)入分頁(yè)器
 
# Create your views here.
def index(request):
  limit = 4 # 每頁(yè)放幾條帖子
  all_post_info = PostInfo.objects[:20] # 取前20個(gè)帖子的數(shù)據(jù)
  paginatior = Paginator(all_post_info, limit)  # 用分頁(yè)器分頁(yè)
  page_num = request.GET.get('page', 1) # 取request中的頁(yè)碼,取不到就為1
  loaded = paginatior.page(page_num) # 取page_num那一頁(yè)的數(shù)據(jù),一般是4條
 
  context = {
    # 首條固定的帖子信息
    'title': '三星 A5 白色',
    'des': '【圖】三星 A5 白色 沒(méi)有打開(kāi)過(guò) - 朝陽(yáng)望京臺(tái)式機(jī)/配件 - 北京58同城',
    'price': '1500',
    'area': ["朝陽(yáng)", "望京"],
    'tag1': "北京二手市場(chǎng)",
    'tag2': "北京二手臺(tái)式機(jī)/配件",
 
    # 每頁(yè)更新的帖子信息
    'one_page_post': loaded
  }
  return render(request, 'index.html',context)

4、修改index.html文件,主要修改了有文字標(biāo)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{(lán){title}}等 -->
           <h2 class="post-title">{{ title }}</h2>
 
           <p class="post-meta">
             地區(qū) <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 }}|價(jià)格:{{ price }}
           </p>
         </div>
       </section>
     </div>
 
     <div class="posts">
       <h1 class="content-subhead">Recent Posts</h1><!-- 增加for循環(huán),將one_page_post值帶入 -->
       {% 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">
               地區(qū) <a class="post-author" href="#" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" >{{ item.area }}</a>分類<!-- 再增加一個(gè)for循環(huán),把cates里的元素都展示出來(lái) -->
               {% 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 }}|價(jià)格:{{ item.price }}
             </p>
           </div>
         </section>
       {% endfor %}
 
     </div>
      <!-- 增加本段div,實(shí)現(xiàn)頁(yè)面底部可翻頁(yè) -->
      <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(項(xiàng)目名稱目錄下)文件,本節(jié)中并沒(méi)有修改,但也備注上:

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),
]

以上步驟完成后,啟動(dòng)服務(wù)(python manage.py runserver),訪問(wèn)http://127.0.0.1:8000/index/即可看到效果。

以上就是本文的全部?jī)?nèi)容,希望對(duì)大家的學(xué)習(xí)有所幫助,也希望大家多多支持腳本之家。

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