搭建自己的部落格（十）：優化分頁功能
阿新 • • 發佈：2018-11-15
上一篇簡單的添加了分頁功能，但是感覺太粗糙了，這篇優化分頁功能。
1、變化的內容
2、上程式碼
ul.blog-types { list-style-type: none; } div.blog:not(:last-child) { margin-bottom: 2em; padding-bottom: 1em; border-bottom: 1px solid #eee; } div.blog h3 { margin-top: 0.5em; } div.blog-info p { margin-bottomblog.css: 0; } div.blog-info-description { list-style-type: none; margin-bottom: 1em; } ul.blog-info-description li { display: inline-block; margin-right: 2em; } div.blog-content { text-indent: 2em; } div.paginator { text-align: center; } div.container { max-width: 80%; }
{% 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' %}"blog_list.html> {% 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 #} <i class="fas fa-tag"></i> <a href="{% url 'blogs_with_type' blog.blog_type.pk %}"> {{ blog.blog_type }} </a> <i class="far fa-clock "></i> {{ blog.created_time|date:"Y-m-d" }} <p> </div> <p>{{ blog.content|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" style=""> <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 }}</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 %}
{% extends 'blog/blog_list.html' %}
{# 標題 #}
{% block title %}
{{ blog_type.type_name }}
{% endblock %}
{% block blog_type_title %}
分類：{{ blog_type.type_name }}
{% endblock %}
blog_with_type.html
from django.shortcuts import render_to_response, get_object_or_404 from .models import Blog, BlogType from django.core.paginator import Paginator from django.conf import settings # Create your views here. # 部落格列表 def blog_list(requests): # 分頁 blogs_all_list = Blog.objects.all() # 獲取全部部落格 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 context = { 'blogs': page_of_blogs.object_list, 'page_of_blogs': page_of_blogs, 'blog_types': BlogType.objects.all(), 'page_range': page_range, } return render_to_response('blog/blog_list.html', context) # 部落格詳情 def blog_detail(requests, blog_pk): context = { 'blog': get_object_or_404(Blog, pk=blog_pk) } return render_to_response('blog/blog_detail.html', context) def blogs_with_type(requests, blog_type_pk): blog_type = get_object_or_404(BlogType, pk=blog_type_pk) # 分頁 blogs_all_list = Blog.objects.filter(blog_type=blog_type) # 獲取全部部落格 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 context = { 'blogs': page_of_blogs.object_list, 'page_of_blogs': page_of_blogs, 'blog_types': BlogType.objects.all(), 'page_range': page_range, 'blog_type': blog_type, } return render_to_response('blog/blog_with_type.html', context)views.py
"""
Django settings for myblog project.
Generated by 'django-admin startproject' using Django 2.1.3.
For more information on this file, see
https://docs.djangoproject.com/en/2.1/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.1/ref/settings/
"""
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'ea+kzo_5k^[email protected]([email protected]*+w5d11=0mp1p5ngr'
# SECURITY WARNING: don't run with debug turned on in production!
DEBUG = True
ALLOWED_HOSTS = []
# Application definition
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'blog.apps.BlogConfig', # 將自己建立的app新增到設定中
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
]
ROOT_URLCONF = 'myblog.urls'
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [
os.path.join(BASE_DIR, 'templates'),
],
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
],
},
},
]
WSGI_APPLICATION = 'myblog.wsgi.application'
# Database
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases
DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
# }
'default': {
'ENGINE': 'django.db.backends.mysql',
'NAME': 'myblogs', # 要連線的資料庫，連線前需要建立好
'USER': 'root', # 連線資料庫的使用者名稱
'PASSWORD': 'felixwang', # 連線資料庫的密碼
'HOST': '127.0.0.1', # 連線主機，預設本級
'PORT': 3306 # 埠 預設3306
}
}
# Password validation
# https://docs.djangoproject.com/en/2.1/ref/settings/#auth-password-validators
AUTH_PASSWORD_VALIDATORS = [
{
'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
},
{
'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
},
]
# Internationalization
# https://docs.djangoproject.com/en/2.1/topics/i18n/
# LANGUAGE_CODE = 'en-us'
LANGUAGE_CODE = 'zh-hans'
# TIME_ZONE = 'UTC'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.1/howto/static-files/
STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, "static")
]
# 自定義引數
EACH_PAGE_BLOGS_NUMBER=7
settings
3、注意點
有時候我們需要用到全域性變數，可以放在settings.py檔案中，然後通過from django.conf import settings呼叫