Python毕业设计-基于Django的在线二手交易平台。的设计与实现+使用说明+全部资料（优秀项目）.zip

from django.shortcuts import render, get_object_or_404, redirect from django.core.mail import send_mail from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger from .models import Post from .forms import EmailPostForm, CommentForm, SearchForm, PostForm, PostUpdateForm from django.db.models import Count from django.contrib.auth.decorators import login_required from django.contrib import messages from django.http import JsonResponse, HttpResponse from django.views.decorators.http import require_POST from common.decorators import ajax_required from actions.utils import create_action, delete_action import redis from django.conf import settings from django.db.models import Q # connect to redis r = redis.StrictRedis(host=settings.REDIS_HOST, port=settings.REDIS_PORT, db=settings.REDIS_DB) # Create your views here. def post_list(request): posts = Post.objects.all() tag = request.GET.get('tag') if tag and tag != 'None': if tag == '收藏': posts = request.user.posts_liked.all() else: posts = posts.filter(tags__name__in=[tag]) paginator = Paginator(posts, 9) page = request.GET.get('page') form = SearchForm() query = None if 'query' in request.GET: form = SearchForm(request.GET) if form.is_valid(): query = form.cleaned_data['query'] results = Post.objects.filter( Q(title__icontains=query) ) return render(request, 'article/search.html', {'form': form, 'query': query, 'results': results}) try: posts = paginator.page(page) except PageNotAnInteger: # 如果页数不是整数，就返回第一页 posts = paginator.page(1) except EmptyPage: # 如果是不存在的页数，而且请求是AJAX请求，返回空字符串 if request.is_ajax(): return HttpResponse('') # 如果页数超范围，显示最后一页 posts = paginator.page(paginator.num_pages) if request.is_ajax(): return render(request, 'article/list_ajax.html', {'posts': posts, 'tag': tag, 'form': form}) return render(request, 'article/list.html', {'posts': posts, 'tag': tag, 'form': form}) @login_required def post_detail(request, id): post = get_object_or_404(Post, id=id) # increment total post views by 1 total_views = r.incr('post:{}:views'.format(post.id)) # increment post ranking by 1 r.zincrby('post_ranking', post.id, 1) # 列出文章对应的所有活动的评论 comments = post.comments.all() new_comment = None if request.method == 'POST': comment_form = CommentForm(request.POST) if comment_form.is_valid(): # 通过表单直接创建新数据对象，但是不要保存到数据库中 new_comment = comment_form.save(commit=False) # 设置外键为当前文章 new_comment.post = post new_comment.author = request.user create_action(request.user, 'commented post', post) # 将评论数据对象写入数据库 new_comment.save() else: comment_form = CommentForm() # 显示相近Tag的文章列表 post_tags_ids = post.tags.values_list('id', flat=True) similar_tags = Post.objects.filter(tags__in=post_tags_ids).exclude(id=post.id) similar_posts = similar_tags.annotate(same_tags=Count('tags')).order_by('-same_tags', '-updated')[:4] return render(request, 'article/detail.html', {'post': post, 'comments': comments, 'new_comment': new_comment, 'comment_form': comment_form, 'similar_posts': similar_posts, 'total_views': total_views}) def post_share(request, id): # 通过id 获取 post 对象 post = get_object_or_404(Post, id=id) sent = False if request.method == 'POST': # 表单被提交 form = EmailPostForm(request.POST) if form.is_valid(): # 验证表单数据 cd = form.cleaned_data # 发送邮件...... post_url = request.build_absolute_uri(post.get_absolute_url()) subject = '{} ({}) recommends you reading "{}"'.format(cd['name'], cd['email'], post.title) message = 'Read "{}" at {}\n\n{}\'s comments:{}'.format(post.title, post_url, cd['name'], cd['comments']) send_mail(subject, message, 'lee0709@vip.sina.com', [cd['to']]) sent = True else: form = EmailPostForm() return render(request, 'article/share.html', {'post': post, 'form': form}) def post_search(request): form = SearchForm() query = None results = [] if 'query' in request.GET: form = SearchForm(request.GET) if form.is_valid(): query = form.cleaned_data['query'] results = Post.objects.filter( Q(title__icontains=query) ) return render(request, 'article/search.html', {'form': form, 'query': query, 'results': results}) @login_required def post_create(request): if request.method == 'POST': # 表单被提交 form = PostForm(data=request.POST, files=request.FILES) if form.is_valid(): new_item = form.save(commit=False) # 将当前用户附加到数据对象上 new_item.author = request.user new_item.save() create_action(request.user, 'created post', new_item) form.save_m2m() messages.success(request, 'Post added successfully') # 重定向到新创建的数据对象的详情视图 return redirect(new_item.get_absolute_url()) else: return redirect('article:post_list') else: # 根据GET请求传入的参数建立表单对象 form = PostForm(data=request.GET) return render(request, 'article/create.html', {'form': form}) @login_required def post_update(request, id): post = get_object_or_404(Post, id=id) if request.user != post.author: return redirect(post.get_absolute_url()) if request.method == 'POST': form = PostUpdateForm(instance=post, data=request.POST, files=request.FILES) if form.is_valid(): form.save() messages.success(request, 'Post updated successfully') return redirect(post.get_absolute_url()) else: messages.error(request, 'Error updating your profile') return redirect(post.get_absolute_url()) else: form = PostForm(instance=post) return render(request, 'article/update.html', {'form': form}) @login_required def post_delete(request, id): post = get_object_or_404(Post, id=id) if request.user != post.author: return redirect(post.get_absolute_url()) delete_action(post) post.delete() return redirect('article:post_list') @ajax_required @login_required @require_POST def post_like(request): post_id = request.POST.get('id') action = request.POST.get('action') if post_id and action: try: post = Post.objects.get(id=post_id) if action == 'like': post.users_like.add(request.user) create_action(request.user, 'likes', post) else: post.users_like.remove(request.user) return JsonResponse({'status': 'ok'}) except: pass return JsonResponse({'status': 'ko'}) def post_ranking(request): # get post ranking dictionary post_ranking = r.zrange('post_ranking', 0, -1, desc=True)[:10] post_ranking_ids = [int(id) for id in post_ranking] # get most viewed posts most_viewed = list(Post.objects.filter( id__in=post_ranking_ids)) most_viewed.sort(key=lambda