搭建自己的部落格（十五）：優化閱讀量，將閱讀量獨立出來
阿新 • • 發佈：2018-11-17
1、變化的部分
2、上程式碼
{# 引用模板 #} {% extends 'base.html' %} {% load staticfiles %} {% block header_extends %} <link rel="stylesheet" href="{% static 'blog/blog.css' %}"> {% endblock %} {# 標題 #} {% block title %} {{ blog.title }} {% endblock %} {# 內容#} {% block content %}blog_detail.html<div class="container"> <div class="row"> <div class="col-6 offset-1"> <ul class="blog-info-description"> <h3>{{ blog.title }}</h3> <li>作者：{{ blog.author }}</li> {# 時間過濾器讓時間按照自己需要的格式過濾 #}<li>釋出日期：{{ blog.created_time|date:"Y-m-d H:n:s" }}</li> <li>分類： <a href="{% url 'blogs_with_type' blog.blog_type.pk %}"> {{ blog.blog_type }} </a> </li> <li>閱讀({{ blog.get_read_num }})</li> </ul> <p class="blog-content">{{ blog.content|safe }}</p> <p>上一篇： {% if previous_blog %} <a href="{% url 'blog_detail' previous_blog.pk %}">{{ previous_blog.title }}</a> {% else %} <span>沒有了</span> {% endif %} </p> <p>下一篇： {% if next_blog %} <a href="{% url 'blog_detail' next_blog.pk %}">{{ next_blog.title }}</a> {% else %} <span>沒有了</span> {% endif %} </p> </div> </div> </div> {% endblock %} {% block js %} <script> $(".nav-blog").addClass("active").siblings().removeClass("active"); </script> {% endblock %}
{% extends 'base.html' %} {% load staticfiles %} {# 標題 #} {% block title %} felix Blog {% endblock %} {% block header_extends %} <link rel="stylesheet" href="{% static 'blog/blog.css' %}"> <link rel="stylesheet" href="{% static 'fontawesome-free-5.5.0-web/css/all.min.css' %}"> {% endblock %} {# 內容#} {% block content %} <div class="container"> <div class="row"> <div class="col-md-8"> <div class="card" style=""> <div class="card-header"><h5 class="card-title">{% block blog_type_title %}部落格列表{% endblock %}</h5> </div> <div class="card-body"> {% for blog in blogs %} <div class="blog"> <h3><a href="{% url 'blog_detail' blog.pk %}">{{ blog.title }}</a></h3> <div class="blog-info"> <p> {# 新增圖示 #} <span> <i class="fas fa-tag"></i> <a href="{% url 'blogs_with_type' blog.blog_type.pk %}"> {{ blog.blog_type }} </a> </span> <span> <i class="far fa-clock "></i> {{ blog.created_time|date:"Y-m-d" }} </span> <span>閱讀({{ blog.get_read_num }})</span> <p> </div> <p>{{ blog.content|safe|truncatechars:30 }}</p> </div> {% empty %} <div class="blog"> <h3>--暫無部落格，敬請期待--</h3> </div> {% endfor %} </div> </div> {# 分頁 #} <div class="paginator"> <ul class="pagination justify-content-center"> {# 首頁 #} <li class="page-item"><a class="page-link" href="?page=1">首頁</a></li> {# 上一頁 #} {% if page_of_blogs.has_previous %} <li class="page-item"><a class="page-link" href="?page={{ page_of_blogs.previous_page_number }}">上一頁</a> </li> {% else %} <li class="page-item disabled"><span class="page-link">上一頁</span></li> {% endif %} {# 全部頁碼 #} {% for page_num in page_range %} {# 添加當前頁高亮顯示 #} {% if page_num == page_of_blogs.number %} <li class="page-item active"><span class="page-link">{{ page_num }}</span></li> {% else %} <li class="page-item"><a class="page-link" href="?page={{ page_num }}">{{ page_num }}</a></li> {% endif %} {% endfor %} {# 下一頁 #} {% if page_of_blogs.has_next %} <li class="page-item"><a class="page-link" href="?page={{ page_of_blogs.next_page_number }}">下一頁</a></li> {% else %} <li class="page-item disabled"><span class="page-link">下一頁</span></li> {% endif %} {# 尾頁 #} <li class="page-item"><a class="page-link" href="?page={{ page_of_blogs.paginator.num_pages }}">尾頁</a></li> </ul> <p> 一共有 {{ page_of_blogs.paginator.count }}篇部落格，當前{{ page_of_blogs.number }}頁，共{{ page_of_blogs.paginator.num_pages }}頁 </p> </div> </div> <div class="col-md-4"> <div class="card"> <div class="card-header"><h5 class="card-title">部落格分類</h5></div> <div class="card-body"> <ul class="blog-types"> {% for blog_type in blog_types %} <li> <a href="{% url 'blogs_with_type' blog_type.pk %}">{{ blog_type.type_name }}({{ blog_type.blog_count }})</a> </li> {% empty %} <li>暫無分類</li> {% endfor %} </ul> </div> </div> <div class="card"> <div class="card-header"><h5 class="card-title">日期歸檔</h5></div> <div class="card-body"> <ul class="blog-dates"> {% for blog_date,blog_count in blog_dates.items %} <li> <a href="{% url 'blogs_with_date' blog_date.year blog_date.month %}"> {{ blog_date|date:'Y年m月' }}({{ blog_count }}) </a> </li> {% empty %} <li>暫無分類</li> {% endfor %} </ul> </div> </div> </div> </div> </div> {% endblock %} {% block js %} <script> $(".nav-blog").addClass("active").siblings().removeClass("active"); </script> {% endblock %}blog_list.html
from django.contrib import admin from .models import BlogType, Blog, ReadNum # Register your models here. @admin.register(BlogType) class BlogTypeAdmin(admin.ModelAdmin): list_display = ('id', 'type_name') # 需要顯示的列表 @admin.register(Blog) class BlogAdmin(admin.ModelAdmin): list_display = ('title', 'blog_type', 'author', 'get_read_num', 'created_time', 'last_updated_time') # 上面的裝飾器和這句相同 # admin.site.register(Blog,BlogAdmin)u @admin.register(ReadNum) class ReadNumAdmin(admin.ModelAdmin): list_display = ('blog', 'read_num')admin.py
from django.db import models from django.db.models.fields import exceptions from django.contrib.auth.models import User from ckeditor_uploader.fields import RichTextUploadingField # Create your models here. # 部落格分類 class BlogType(models.Model): type_name = models.CharField(max_length=15) # 部落格分類名稱 def __str__(self): # 顯示標籤名 return self.type_name # 部落格 class Blog(models.Model): title = models.CharField(max_length=50) # 部落格標題 blog_type = models.ForeignKey(BlogType, on_delete=models.DO_NOTHING) # 部落格分類 content = RichTextUploadingField() # 部落格內容，使用富文字編輯 author = models.ForeignKey(User, on_delete=models.DO_NOTHING) # 部落格作者 created_time = models.DateTimeField(auto_now_add=True) # 部落格建立時間 last_updated_time = models.DateTimeField(auto_now=True) # 部落格更新事件 def get_read_num(self): # 獲取一對一關聯的閱讀數 try: return self.readnum.read_num except exceptions.ObjectDoesNotExist as e: return 0 def __str__(self): # 顯示標題名 return "<Blog:{}>".format(self.title) class Meta: ordering = ['-created_time'] # 定義排序規則，按照建立時間倒序 # 閱讀量 class ReadNum(models.Model): read_num = models.IntegerField(default=0) # 閱讀量 blog = models.OneToOneField(Blog, on_delete=models.DO_NOTHING)models.py
from django.shortcuts import render_to_response, get_object_or_404 from .models import Blog, BlogType, ReadNum from django.core.paginator import Paginator from django.conf import settings from django.db.models import Count # 分頁部分公共程式碼 def blog_list_common_data(requests, blogs_all_list): paginator = Paginator(blogs_all_list, settings.EACH_PAGE_BLOGS_NUMBER) # 第一個引數是全部內容，第二個是每頁多少 page_num = requests.GET.get('page', 1) # 獲取url的頁面引數（get請求） page_of_blogs = paginator.get_page(page_num) # 從分頁器中獲取指定頁碼的內容 current_page_num = page_of_blogs.number # 獲取當前頁 all_pages = paginator.num_pages if all_pages < 5: page_range = list( range(max(current_page_num - 2, 1), min(all_pages + 1, current_page_num + 3))) # 獲取需要顯示的頁碼 並且剔除不符合條件的頁碼 else: if current_page_num <= 2: page_range = range(1, 5 + 1) elif current_page_num >= all_pages - 2: page_range = range(all_pages - 4, paginator.num_pages + 1) else: page_range = list( range(max(current_page_num - 2, 1), min(all_pages + 1, current_page_num + 3))) # 獲取需要顯示的頁碼 並且剔除不符合條件的頁碼 blog_dates = Blog.objects.dates('created_time', 'month', order='DESC') blog_dates_dict = {} for blog_date in blog_dates: blog_count = Blog.objects.filter(created_time__year=blog_date.year, created_time__month=blog_date.month).count() blog_dates_dict = { blog_date: blog_count } return { 'blogs': page_of_blogs.object_list, 'page_of_blogs': page_of_blogs, 'blog_types': BlogType.objects.annotate(blog_count=Count('blog')), # 新增查詢並新增欄位 'page_range': page_range, 'blog_dates': blog_dates_dict } # 部落格列表 def blog_list(requests): blogs_all_list = Blog.objects.all() # 獲取全部部落格 context = blog_list_common_data(requests, blogs_all_list) return render_to_response('blog/blog_list.html', context) # 根據型別篩選 def blogs_with_type(requests, blog_type_pk): blog_type = get_object_or_404(BlogType, pk=blog_type_pk) blogs_all_list = Blog.objects.filter(blog_type=blog_type) # 獲取全部部落格 context = blog_list_common_data(requests, blogs_all_list) context['blog_type'] = blog_type return render_to_response('blog/blog_with_type.html', context) # 根據日期篩選 def blogs_with_date(requests, year, month): blogs_all_list = Blog.objects.filter(created_time__year=year, created_time__month=month) # 獲取全部部落格 context = blog_list_common_data(requests, blogs_all_list) context['blogs_with_date'] = '{}年{}日'.format(year, month) return render_to_response('blog/blog_with_date.html', context) # 部落格詳情 def blog_detail(requests, blog_pk): blog = get_object_or_404(Blog, pk=blog_pk) # 獲取並處理閱讀計數 if not requests.COOKIES.get('blog_{}_read'.format(blog_pk)): if ReadNum.objects.filter(blog=blog).count(): readnum = ReadNum.objects.get(blog=blog) else: readnum = ReadNum(blog=blog) # 處理閱讀量 readnum.read_num += 1 readnum.save() context = { 'blog': blog, 'previous_blog': Blog.objects.filter(created_time__gt=blog.created_time).last(), 'next_blog': Blog.objects.filter(created_time__lt=blog.created_time).first(), } response = render_to_response('blog/blog_detail.html', context) response.set_cookie('blog_{}_read'.format(blog_pk), 'true') return responseviews.py