Django 前端BootCSS 实现分页

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2023-02-16
Django Ajax 实现Web命令行执行
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标签   Django

通过使用bootstrap框架，并配合Django自带的Paginator分页组件即可实现简单的分页效果。

1.创建MyWeb项目

python manage.py startapp MyWeb

2.修改settings.py配置文件,导入我们的app的名字，去掉csrf这个选项

# 屏蔽一项
MIDDLEWARE = [
    #'django.middleware.csrf.CsrfViewMiddleware'
]
 
# 新增一项
TEMPLATES = [
	'MyWeb.apps.MywebConfig'
]

3.来urls.py里面写一条路由，名字就叫index/映射到views.index函数下处理此请求

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

4.最后在myweb里面的views.py设置一个视图函数,最后运行

from django.shortcuts import render
from django.shortcuts import HttpResponse
from MyWeb import models
 
def index(requests):
    return HttpResponse("abcd")

5.配置数据库文件models.py并设置以下内容

from django.db import models
 
# 创建用户表
class User(models.Model):
    id = models.AutoField(primary_key=True)
    username = models.CharField(max_length=32)
    password = models.CharField(max_length=32)

6.更新数据库与数据表

python manage.py makemigrations   # 将你的数据库变动记录下来(并不会帮你创建表)
python manage.py migrate          # 将你的数据库变动正在同步到数据库中

7.增加一个新的view并使用rand()函数.

首先在urls.py中增加路由

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

其次在view.py视图中增加生成函数.

from django.shortcuts import render
from django.shortcuts import HttpResponse
from MyWeb import models
import random
 
# 首页
def index(requests):
    return HttpResponse("abcd")
 
# 生成测试数据
def rand(request):
    for i in range(1,1000):
        chars = []
        pasd = []
        for x in range(1,8):
            chars.append(random.choice('abcdefghijklmnopqrstuvwxyz'))
            pasd.append(random.choice('0987654321'))
        user = "".join(chars)
        pwd = "".join(pasd)
        models.User.objects.create(username=user, password=pwd)
    return HttpResponse("ok")

启动django并访问http://127.0.0.1:8000/rand/等待数据生成结束.

8.在templates模板中，新增一个page.html页面。

<!--name: page.html-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <link rel="stylesheet" href="https://cdn.lyshark.com/bootstrap/4.5.0/css/bootstrap.min.css">
</head>
<body>
<table class="table table-sm table-hover">
    <thead>
        <tr class="table-success">
            <th> 序号</th> <th> 用户名</th> <th> 用户密码</th>
        </tr>
    </thead>
    <tbody>
        {% for article in user_list %}
            <tr class="table-primary">
                <td>{{ article.id }}</td>
                <td>{{ article.username }}</td>
                <td>{{ article.password }}</td>
            </tr>
        {% endfor %}
    </tbody>
</table>
<nav class="d-flex justify-content-center" aria-label="Page navigation example">
    <ul class="pagination">
        <li class="page-item"><a class="page-link" href="./page?id=1">首页</a></li>
        {% if user_list.has_previous %}
            <li class="page-item"><a class="page-link" href="./page?id={{ user_list.previous_page_number }}">上一页</a></li>
        {% else %}
            <li class="page-item disabled"><a class="page-link" href="#">上一页</a></li>
        {% endif %}
 
        {% for item in page_range %}
            {% if item == currentPage %}
                <li class="page-item active"><a class="page-link" href="./page?id={{ item }}">{{ item }}</a></li>
            {% else %}
                <li class="page-item"><a class="page-link" href="./page?id={{ item }}">{{ item }}</a></li>
            {% endif %}
        {% endfor %}
 
        {% if user_list.has_next %}
            <li class="page-item"><a class="page-link" href="./page?id={{ user_list.next_page_number }}">下一页</a></li>
        {% else %}
            <li class="page-item disabled"><a class="page-link" href="#">下一页</a></li>
        {% endif %}
        <li class="page-item"><a class="page-link" href="./page?id={{ paginator.num_pages }}">尾页</a></li>
    </ul>
</nav>
 
<div style="text-align: center;" class="alert alert-dark">
   统计: {{ currentPage }}/{{ paginator.num_pages }} 共查询到:{{ paginator.count }} 条数据 页码列表:{{ paginator.page_range }}
</div>
</body>
</html>

9.最后在路由曾以及view中增加对应的URL以及路由函数.

首先在urls.py中增加一条新路由.

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

接着在views.py中增加一个page函数.

from django.shortcuts import render
from django.shortcuts import HttpResponse
from MyWeb import models
import random
 
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 
# 首页
def index(requests):
    return HttpResponse("abcd")
 
# 生成测试数据
def rand(request):
    for i in range(1,1000):
        chars = []
        pasd = []
        for x in range(1,8):
            chars.append(random.choice('abcdefghijklmnopqrstuvwxyz'))
            pasd.append(random.choice('0987654321'))
        user = "".join(chars)
        pwd = "".join(pasd)
        models.User.objects.create(username=user, password=pwd)
    return HttpResponse("ok")
 
# 分页函数
def page(request):
    user = models.User.objects.all()
    paginator = Paginator(user, 10)
    currentPage = int(request.GET.get("id",1))
 
    if paginator.num_pages > 15:
        if currentPage-5 < 1:
            pageRange = range(1,11)
        elif currentPage+5 > paginator.num_pages:
            pageRange = range(currentPage-5,paginator.num_pages)
        else:
            pageRange = range(currentPage-5,currentPage+5)
    else:
        pageRange = paginator.page_range
 
    try:
        user_list = paginator.page(currentPage)
    except PageNotAnInteger:
        user_list = paginator.page(1)
    except:
        user_list = paginator.page(paginator.num_pages)
 
    return render(request,"page.html",{"user_list":user_list,
                                       "paginator":paginator,
                                       "page_range":pageRange,
                                       "currentPage":currentPage})

准备就绪之后，直接访问http://127.0.0.1:8000/page即可看到分页显示效果.

img

Django Ajax 实现Web命令行执行
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python图形界面tkinter的使用技巧
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