import traceback from typing import Dict, List from unicodedata import category from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage from django.db.models import Prefetch, Q from django.http import Http404, HttpResponse from django.shortcuts import render, get_object_or_404 from loguru import logger from article.models import Article from base.models import MainMenu from news.models import NewsSection, News from utils.format import get_now_strftime_format # Create your views here. # 2. 新增：文章详情视图函数 def article_detail(request, pk: int): """ 根据主键 (pk) 获取文章详情 """ try: # 使用 get_object_or_404 简化代码：如果文章不存在，自动返回 404 页面 article = get_object_or_404(Article, pk=pk) # 如果是渲染 HTML 模板 return render(request, 'front/details/article.html', {'article': article}) except (Article.DoesNotExist, Http404): return render(request, 'front/error/404.html') except Exception as e: logger.error(e) logger.error(traceback.format_exc()) return render(request, 'front/error/500.html') def news_detail(request, pk: int): """ 根据主键 (pk) 获取文章详情 """ try: # 使用 get_object_or_404 简化代码：如果文章不存在，自动返回 404 页面 article = get_object_or_404(News, pk=pk) # 如果是渲染 HTML 模板 return render(request, 'front/details/news.html', {'article': article}) except (News.DoesNotExist, Http404): return render(request, 'front/error/404.html') except Exception as e: logger.error(e) logger.error(traceback.format_exc()) return render(request, 'front/error/500.html') def index(request): # 时间字符串 time_str = get_now_strftime_format() news_sections = NewsSection.objects.filter(visible=True).order_by('order') news_data = { "key": "news", "data": { section.title: section.news_set.filter(is_published=True).order_by("-created_at") for section in news_sections } } articles_qs = Article.objects.filter(is_published=True).order_by('-created_at') main_sections = MainMenu.objects.filter(parent__isnull=True, visible=True).order_by('order').prefetch_related( # 预取可见的子板块 Prefetch('children', queryset=MainMenu.objects.filter(visible=True).order_by('order')), # 预取子板块下的文章，并将结果存入 'latest_articles' 属性 # 注意：这个属性是属于 'children' (即下面的 sub) 的 Prefetch('children__article_set', queryset=articles_qs, to_attr='latest_articles') ) # 3. 构建数据 (纯内存操作，速度极快) section_data = [{ "key": main.code, "data": {main.title: articles_qs.filter(section__in=main.children.all()).order_by('-created_at')[:7]} } for main in main_sections] logger.info(section_data) carousel = { "key": "index", "data": [ { "id": 0, "image_url": "/media/upload/images/2022/12/15/11146164001.jpg", "title": "First slide label", # "description": "Some representative placeholder content for the first slide." }, { "id": 1, "image_url": "/media/upload/images/2022/12/15/11142163743.jpg", "title": "Second slide label", # "description": "Some representative placeholder content for the second slide." }, { "id": 2, "image_url": "/media/upload/images/2022/12/15/11150164804.jpg", "title": "Third slide label", # "description": "Some representative placeholder content for the third slide." } ] } return render(request, 'front/index.html', { 'time_str': time_str, 'news_data': news_data, 'section_data': section_data, 'carousel': carousel, }) def about(request): return render(request, 'front/about.html', { 'leaders': [], 'about': {'content': '这里是单位简介'}, 'org_list': [], }) def news(request): sections = NewsSection.objects.filter(visible=True).all().order_by('order') section_data = [ { "key": section.code, "data": { section.title: section.news_set.filter(is_published=True)[:7], } } for section in sections ] context = { 'sections': section_data, } logger.info(context) return render(request, 'front/news.html', context) def section(request, main): """信息公开""" logger.info(f"正在访问 {main}") main_section = MainMenu.objects.filter(code=main).first() if not main_section: raise Http404("不存在的板块") sections = MainMenu.objects.filter(parent__isnull=False, parent__code=main).order_by('order') sections_data = [ { "key": section.code, "data": { section.title: section.article_set.filter(is_published=True).order_by('-created_at')[:7], } } for section in sections] logger.info(sections_data) context = { 'main_section': main_section, 'sections': sections_data, } return render(request, 'front/info.html', context=context) def main_news_list(request): logger.info("正在访问新闻中心") news_list = News.objects.all() news_sections = NewsSection.objects.all() # 分页参数 news_list = custom_pagination(news_list, request) return render(request, 'front/list.html', { 'main_section': { 'title': '新闻中心', 'code': 'news' }, 'articles': news_list, 'sections': news_sections, }) def custom_pagination(news_list, request): page = request.GET.get('page', 1) # 当前页码，默认第1页 per_page = request.GET.get('per_page', 20) # 每页显示条数，默认20 # 创建分页器 paginator = Paginator(news_list, per_page) try: # 获取当前页数据 news_list = paginator.page(page) except PageNotAnInteger: # 如果页码不是整数，返回第一页 news_list = paginator.page(1) except EmptyPage: # 如果页码超出范围，返回最后一页 news_list = paginator.page(paginator.num_pages) return news_list def sub_news_list(request, sub: str): logger.info(f"正在访问 {sub}") sections = NewsSection.objects.all().order_by('order') logger.info(f"新闻板块: {sections}") main_section = { 'title': '新闻中心', 'code': 'news' } sub_section = sections.filter(code=sub).first() logger.info(f"主板块 {main_section} 子板块 {sub_section}") if not sub_section or not main_section: raise Http404("不存在的板块") news_list = sub_section.news_set.filter(is_published=True).order_by('-created_at')[:21] news_list = custom_pagination(news_list, request) context = { 'main_section': main_section, 'sub_section': sub_section, 'sections': sections, 'articles': news_list } logger.info(context) return render(request, 'front/list.html', context=context) def main_article_list(request, main): """信息公开""" logger.info(f"正在访问 {main}") main_section = MainMenu.objects.filter(code=main).first() if not main_section: raise Http404("不存在的板块") articles_qs = Article.objects.filter(is_published=True, section__in=main_section.active_children).order_by( '-created_at') sections = main_section.active_children.order_by('order').prefetch_related( Prefetch('article_set', queryset=articles_qs, to_attr='latest_articles') ) articles = custom_pagination(articles_qs, request) context = { 'main_section': main_section, 'sections': sections, 'articles': articles, } return render(request, 'front/list.html', context=context) def sub_article_list(request, main: str, sub: str): """信息公开""" logger.info(f"正在访问 {main}") sections = MainMenu.objects.all().order_by('order') main_section = sections.filter(code=main).first() sub_section = sections.filter(code=sub, parent__code=main).first() logger.info(f"主板块 {main_section} 子板块 {sub_section}") if not sub_section or not main_section: raise Http404("不存在的板块") articles = sub_section.article_set.filter(is_published=True).order_by('-created_at') articles = custom_pagination(articles, request) context = { 'main_section': main_section, 'sub_section': sub_section, 'sections': sections.filter(parent__code=main), 'articles': articles } return render(request, 'front/list.html', context=context)