上传第15节课的代码

15.上下篇博客和按月分类/blog/admin.py

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+from django.contrib import admin
+from .models import BlogType, Blog
+
+@admin.register(BlogType)
+class BlogTypeAdmin(admin.ModelAdmin):
+    list_display = ('id', 'type_name')
+
+@admin.register(Blog)
+class BlogAdmin(admin.ModelAdmin):
+    list_display = ('title', 'blog_type', 'author', 'created_time', 'last_updated_time')

15.上下篇博客和按月分类/blog/apps.py

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+from django.apps import AppConfig
+
+
+class BlogConfig(AppConfig):
+    name = 'blog'

15.上下篇博客和按月分类/blog/migrations/0001_initial.py

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+# Generated by Django 2.0 on 2018-10-28 08:58
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='Blog',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('title', models.CharField(max_length=50)),
+                ('content', models.TextField()),
+                ('created_time', models.DateTimeField(auto_now_add=True)),
+                ('last_updated_time', models.DateTimeField(auto_now=True)),
+                ('author', models.ForeignKey(on_delete=django.db.models.deletion.DO_NOTHING, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='BlogType',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('type_name', models.CharField(max_length=15)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='blog',
+            name='blog_type',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.DO_NOTHING, to='blog.BlogType'),
+        ),
+    ]

15.上下篇博客和按月分类/blog/migrations/0002_auto_20200319_2356.py

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+# Generated by Django 2.2.5 on 2020-03-19 15:56
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='blog',
+            options={'ordering': ['-created_time']},
+        ),
+    ]

15.上下篇博客和按月分类/blog/models.py

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+from django.db import models
+from django.contrib.auth.models import User
+
+class BlogType(models.Model):
+    type_name = models.CharField(max_length=15)
+
+    def __str__(self):
+        return self.type_name
+
+class Blog(models.Model):
+    title = models.CharField(max_length=50)
+    blog_type = models.ForeignKey(BlogType, on_delete=models.DO_NOTHING)
+    content = models.TextField()
+    author = models.ForeignKey(User, on_delete=models.DO_NOTHING)
+    created_time = models.DateTimeField(auto_now_add=True)
+    last_updated_time = models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        return "<Blog: %s>" % self.title
+
+    class Meta:
+        ordering = ['-created_time']
+

15.上下篇博客和按月分类/blog/static/blog/blog.css

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+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 p.blog-info {
+    margin-top: 0;
+}
+div.paginator {
+    text-align: center;
+}
+
+ul.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.blog-more {
+    margin-top: 1em;
+}

15.上下篇博客和按月分类/blog/templates/blog/blog_detail.html

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+{% extends 'base.html' %}
+{% block title %}{{ blog.title }}{% endblock %}
+{% block nav_blog_active %}active{% endblock %}
+
+{% load staticfiles %}
+{% block header_extends %}
+    <link rel="stylesheet" href="{% static 'blog/blog.css' %}">
+{% endblock %}
+
+{# 页面内容 #}
+{% block content %}
+    <div class="container">
+        <div class="row">
+            <div class="col-xs-10 col-xs-offset-1">
+                <h3>{{ blog.title }}</h3>
+                <ul class="blog-info-description">
+                    <li>作者：{{ blog.author }}</li>
+                    <li>分类：<a href="{% url 'blogs_with_type' blog.blog_type.pk %}">{{ blog.blog_type }}</a></li>
+                    <li>发表日期：{{ blog.created_time|date:"Y-m-d H:n:s" }}</li>
+                </ul>
+                <div class="blog-content">{{ blog.content }}</div>
+                <div class="blog-more">
+                    <p>上一篇：
+                        {% if previous_blog %}
+                            <a href="{% url 'blog_detail' previous_blog.pk %}">{{ previous_blog.title }}</a>
+                        {% else %}
+                            没有了
+                        {% endif %}
+                    </p>
+                    <p>下一篇：
+                        {% if next_blog %}
+                            <a href="{% url 'blog_detail' next_blog.pk %}">{{ next_blog.title }}</a>
+                        {% else %}
+                            没有了
+                        {% endif %}
+                    </p>
+                </div>
+            </div>
+        </div>
+    </div>
+{% endblock %}

15.上下篇博客和按月分类/blog/templates/blog/blog_list.html

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+{% extends 'base.html' %}
+{% block title %}我的网站{% endblock %}
+{% block nav_blog_active %}active{% endblock %}
+
+{% load staticfiles %}
+{% block header_extends %}
+    <link rel="stylesheet" href="{% static 'blog/blog.css' %}">
+{% endblock %}
+
+{# 页面内容 #}
+{% block content %}
+    <div class="container">
+        <div class="row">
+            <div class="col-xs-12 col-sm-8 col-md-9 col-lg-10">
+                <div class="panel panel-default">
+                    <div class="panel-heading">{% block blog_list_title %}博客列表{% endblock %}</div>
+                    <div class="panel-body">
+                        {% for blog in blogs %}
+                            <div class="blog">
+                                <h3><a href="{% url 'blog_detail' blog.pk %}">{{ blog.title }}</a></h3>
+                                <p class="blog-info">
+                                    <span class="glyphicon glyphicon-tag"></span><a href="{% url 'blogs_with_type' blog.blog_type.pk %}">{{ blog.blog_type }}</a>
+                                    <span class="glyphicon glyphicon-time"></span>{{ blog.created_time|date:"Y-m-d" }}
+                                </p>
+                                <p>{{ blog.content|truncatechars:30 }}</p>
+                            </div>
+                        {% empty %}
+                            <div class="blog">
+                                <h3>-- 暂无博客，敬请期待 --</h3>
+                            </div>
+                        {% endfor %}
+                    </div>
+                </div>
+                <div class="paginator">
+                    <ul class="pagination">
+                        {# 上一页 #}
+                        <li>
+                            {% if page_of_blogs.has_previous %}
+                                <a href="?page={{ page_of_blogs.pageprevious_page_number }}" aria-label="Previous">
+                                    <span aria-hidden="true">&laquo;</span>
+                                </a>
+                            {% else %}
+                                <span aria-hidden="true">&laquo;</span>
+                            {% endif %}
+                        </li>
+                        {# 全部页码 #}
+                        {% for page_num in page_range %}
+                            {% if page_num == page_of_blogs.number %}
+                                <li class="active"><span>{{ page_num }}</span></li>
+                            {% else %}
+                                {% if page_num == '...' %}
+                                    <li><span>{{ page_num }}</span></li>
+                                {% else %}
+                                    <li><a href="?page={{ page_num }}">{{ page_num }}</a></li>
+                                {% endif %}
+                            {% endif %}
+                        {% endfor %}
+                        {# 下一页 #}
+                        <li>
+                            {% if page_of_blogs.has_next %}
+                                <a href="?page={{ page_of_blogs.next_page_number }}" aria-label="Next">
+                                    <span aria-hidden="true">&raquo;</span>
+                                </a>
+                            {% else %}
+                                <span aria-hidden="true">&raquo;</span>
+                            {% endif %}
+                        </li>
+                    </ul>
+                    <p>
+                        共有{{ page_of_blogs.paginator.count }}篇博客，
+                        当前第{{ page_of_blogs.number }}页，共{{ page_of_blogs.paginator.num_pages }}页
+                    </p>
+                </div>
+            </div>
+            <div class="hidden-xs col-sm-4 col-md-3 col-lg-2">
+                <div class="panel panel-default">
+                    <div class="panel-heading">博客分类</div>
+                    <div class="panel-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>暂无分类</li>
+                            {% endfor %}
+                        </ul>
+                    </div>
+                </div>
+                <div class="panel panel-default">
+                    <div class="panel-heading">日期归档</div>
+                    <div class="panel-body">
+                        <ul>
+                            {% for blog_date in blog_dates %}
+                                <li>
+                                    <a href="{% url 'blogs_with_date' blog_date.year blog_date.month %}">
+                                        {{ blog_date|date:"Y年m月"}}
+                                    </a>
+                                </li>
+                            {% endfor %}
+                        </ul>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+{% endblock %}

15.上下篇博客和按月分类/blog/templates/blog/blogs_with_date.html

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+{% extends 'blog/blog_list.html' %}
+{% block title %}{{ blog_type.type_name }}{% endblock %}
+
+{% block blog_list_title %}
+    日期归档：{{ blogs_with_date }}
+    <a href="{% url 'blog_list' %}">查看全部博客</a>
+{% endblock %}

15.上下篇博客和按月分类/blog/templates/blog/blogs_with_type.html

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+{% extends 'blog/blog_list.html' %}
+{% block title %}{{ blog_type.type_name }}{% endblock %}
+
+{% block blog_list_title %}
+    分类：{{ blog_type.type_name }}
+    <a href="{% url 'blog_list' %}">查看全部博客</a>
+{% endblock %}

15.上下篇博客和按月分类/blog/tests.py

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+from django.test import TestCase
+
+# Create your tests here.

15.上下篇博客和按月分类/blog/urls.py

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+from django.urls import path
+from . import views
+
+# start with blog
+urlpatterns = [
+    # http://localhost:8000/blog/1
+    path('', views.blog_list, name='blog_list'),
+    path('<int:blog_pk>', views.blog_detail, name="blog_detail"),
+    path('type/<int:blog_type_pk>', views.blogs_with_type, name="blogs_with_type"),
+    path('date/<int:year>/<int:month>', views.blogs_with_date, name="blogs_with_date"),
+]

15.上下篇博客和按月分类/blog/views.py

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+from django.shortcuts import render_to_response, get_object_or_404
+from django.core.paginator import Paginator
+from django.conf import settings
+from .models import Blog, BlogType
+
+def get_blogs_list_common_data(request, blogs_all_list):
+    paginator = Paginator(blogs_all_list, settings.EACH_PAGE_BLOGS_NUMBER)
+    page_num = request.GET.get('page', 1)  # 获取url的页码参数（GET请求）
+    page_of_blogs = paginator.get_page(page_num)
+    currentr_page_num = page_of_blogs.number  # 获取当前页码
+    # 获取当前页面前后各2页的页码范围
+    page_range = list(range(max(currentr_page_num - 2, 1), currentr_page_num)) + \
+                 list(range(currentr_page_num, min(currentr_page_num + 2, paginator.num_pages) + 1))
+    # 加上省略页码标记
+    if page_range[0] - 1 >= 2:
+        page_range.insert(0, '...')
+    if paginator.num_pages - page_range[-1] >= 2:
+        page_range.append('...')
+    # 加上首页和尾页
+    if page_range[0] != 1:
+        page_range.insert(0, 1)
+    if page_range[-1] != paginator.num_pages:
+        page_range.append(paginator.num_pages)
+
+    context = {}
+    context['blogs'] = page_of_blogs.object_list
+    context['page_of_blogs'] = page_of_blogs
+    context['page_range'] = page_range
+    context['blog_types'] = BlogType.objects.all()
+    context['blog_dates'] = Blog.objects.dates('created_time', 'month', order="DESC")
+    return context
+
+def blog_list(request):
+    blogs_all_list = Blog.objects.all()
+    context = get_blogs_list_common_data(request, blogs_all_list)
+    return render_to_response('blog/blog_list.html', context)
+
+def blogs_with_type(request, blog_type_pk):
+    blog_type = get_object_or_404(BlogType, pk=blog_type_pk)
+    blogs_all_list = Blog.objects.filter(blog_type=blog_type)
+    context = get_blogs_list_common_data(request, blogs_all_list)
+    context['blog_type'] = blog_type
+    return render_to_response('blog/blogs_with_type.html', context)
+
+def blogs_with_date(request, year, month):
+    blogs_all_list = Blog.objects.filter(created_time__year=year, created_time__month=month)
+    context = get_blogs_list_common_data(request, blogs_all_list)
+    context['blogs_with_date'] = '%s年%s月' % (year, month)
+    return render_to_response('blog/blogs_with_date.html', context)
+
+def blog_detail(request, blog_pk):
+    context = {}
+    blog = get_object_or_404(Blog, pk=blog_pk)
+    context['previous_blog'] = Blog.objects.filter(created_time__gt=blog.created_time).last()
+    context['next_blog'] = Blog.objects.filter(created_time__lt=blog.created_time).first()
+    context['blog'] = blog
+    return render_to_response('blog/blog_detail.html', context)

15.上下篇博客和按月分类/manage.py

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+#!/usr/bin/env python
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError as exc:
+        raise ImportError(
+            "Couldn't import Django. Are you sure it's installed and "
+            "available on your PYTHONPATH environment variable? Did you "
+            "forget to activate a virtual environment?"
+        ) from exc
+    execute_from_command_line(sys.argv)