Django-开发一个列表页面

需求

基于ListView,创建一个列表视图,用于展示"BookInfo"表的信息
要求提供分页
提供对书名,作者,描述的查询功能

示例展示:
在这里插入图片描述

1. 数据模型

models.py

class BookInfo(models.Model):title=models.CharField(verbose_name="书名",max_length=100)author=models.CharField(verbose_name="作者",max_length=100)desc=models.TextField(verbose_name="介绍")create_at=models.DateTimeField(verbose_name="创建时间",auto_now=True)update_at=models.DateTimeField(verbose_name="更新时间",auto_now_add=True)

2. 视图

views.py

from functools import reduce
from typing import Any
from django.shortcuts import render,redirect  
from django.db.models import Q
from django.views.generic import ListView
from django.views.generic.detail import DetailView
from .models import *
from .forms import *class BookListView(ListView):model=BookInfotemplate_name = "demo1/book_list.html"paginate_by = 10def get_queryset(self):title = self.request.GET.get('title')author = self.request.GET.get('author')content = self.request.GET.get('content')# 如果有任意参数不为空，则构建Q对象进行查询queries = [Q(titile__icontains=title) if title else Q(),Q(author__icontains=author) if author else Q(),Q(desc__icontains=content) if content else Q()]# 使用Q对象的&操作符组合查询条件queryset = BookInfo.objects.filter(reduce(lambda x, y: x & y, queries)) if queries else BookInfo.objects.all()return querysetdef get_context_data(self, **kwargs):context = super().get_context_data(**kwargs)# 保留查询参数到分页链接query_params = self.request.GET.copy()if 'page' in query_params:del query_params['page']  # 移除现有的页码参数以避免冲突paginator = context['paginator']page_numbers_range = 5  # 您可以根据需要调整显示的页码范围大小max_index = len(paginator.page_range)page = self.request.GET.get('page')current_page = int(page) if page else 1start_index = int((current_page - 1) / page_numbers_range) * page_numbers_rangeend_index = start_index + page_numbers_rangeif end_index >= max_index:end_index = max_indexpage_range = paginator.page_range[start_index:end_index]context['page_range'] = page_rangecontext['query_params'] = query_params.urlencode()  # 将查询参数编码为URL字符串return contextdef get(self, request, *args, **kwargs):# 如果是重定向回来的，需要处理paginate_by参数if 'paginate_by' in request.GET:try:paginate_by = int(request.GET['paginate_by'])if paginate_by > 0:  # 防止不合法的值self.paginate_by = paginate_byexcept ValueError:pass  # 如果转换失败，忽略错误，使用默认设置return super().get(request, *args, **kwargs)class BookDetailView(DetailView):model=BookInfotemplate_name = "demo1/book_detail.html"context_object_name = "book"

注册路由(urls.py)

from django.urls import path
from .views import *urlpatterns = [path("book",BookListView.as_view(),name="book-list"),path("book/detail/<int:pk>/",BookDetailView.as_view(),name="book-detail"),
]

3. 页面代码

列表页:

{% extends 'layout.html' %}{% block main %}<div class="panel panel-default"><div class="container"><form method="GET">检索:<input type="text" name="title" placeholder="书名" value="{{ request.GET.title }}"><input type="text" name="author" placeholder="作者" value="{{ request.GET.author }}"><input type="text" name="content" placeholder="内容关键字" value="{{ request.GET.content }}"><button type="submit">搜索</button>&nbsp; <a href="{% url 'book-list' %}" class="btn-sm btn-danger">清空查询条件</a></form></div><hr><div class="panel-body"><table class="table table-striped"><thead><tr><th>ID</th><th>书名</th><th>作者</th><th>说明</th><th>创建时间</th><th>更新时间</th><th>操作</th></tr></thead><tbody>{% for book in object_list %}<tr><td>{{ book.id }}</td><td>{{ book.titile }}</td><td>{{ book.author }}</td><td>{{ book.desc }}</td><td>{{ book.create_at }}</td><td>{{ book.update_at }}</td><td><a href="{% url 'book-detail' book.id %}">查看详情</a></td></tr>{% endfor %}</tbody></table>{% if is_paginated %}<div class="pagination"><p>第 {{ page_obj.number }} 页 / 共 {{ page_obj.paginator.num_pages }} 页</p><!-- 首页 -->{% if page_obj.has_previous %}<a href="?{{ query_params }}&page=1">首页</a>{% endif %}<!-- 上一页 -->{% if page_obj.has_previous %}<a href="?{{ query_params }}&page={{ page_obj.previous_page_number }}">上一页</a>{% endif %}<!-- 中间页码，显示首末3页及当前页附近的页码，其余用省略号表示 -->{% for num in page_obj.paginator.page_range %}{% if num == page_obj.number %}<span>{{ num }}</span> <!-- 当前页不做成链接 -->{% elif num >= page_obj.number|add:-2 and num <= page_obj.number|add:2 %}<a href="?{{ query_params }}&page={{ num }}">{{ num }}</a>{% elif num in page_obj.paginator.page_range|slice:":3" or num in page_obj.paginator.page_range|slice:"-3:" %}<a href="?{{ query_params }}&page={{ num }}">{{ num }}</a> <!-- 确保首末3页始终显示 -->{% elif num == page_obj.number|add:-3 or num == page_obj.number|add:3 %}<span>...</span>{% endif %}{% endfor %}<!-- 下一页 -->{% if page_obj.has_next %}<a href="?{{ query_params }}&page={{ page_obj.next_page_number }}">下一页</a>{% endif %}<!-- 尾页 -->{% if page_obj.has_next %}<a href="?{{ query_params }}&page={{ page_obj.paginator.num_pages }}">尾页</a>{% endif %}<!-- 当前页及总页数信息 --><!-- 跳转到指定页的表单 --><label for="jumpToPage">跳转到页数:</label><input type="number" id="jumpToPage" min="1"><button onclick="jumpToPage()">跳转</button></div></div>{% endif %}</div><script>function jumpToPage() {var jumpTo = document.getElementById('jumpToPage').value;var currentQueryParams = new URLSearchParams(window.location.search);if (jumpTo.trim() !== '') { // 确保输入有效// 保留现有查询参数，并添加或更新'page'参数currentQueryParams.set('page', jumpTo);window.location.href = window.location.pathname + '?' + currentQueryParams.toString();} else {alert('请输入有效的页数');}}</script>
{% endblock %}