CMD允许django: 

python manage.py runserver

CMD命令：打开当前文件夹

start .

打开指定文件夹

start pattern

创建一个django项目：

django-admin startproject project_name

CMD命令：django-admin

url路径传递参数

path('detail/<int:article_id>',blog.views.get_detail_page)
#views
def get_detail_page(request,article_id):
    pass

通过url传递参数,进行页面跳转

def get_index_page(request):
    all_article = Article.objects.all()
    return render(request,'blog/index.html',{'artcle_list':all_article}

返回 通过render 函数对 index.html页面进行渲染,同时传入渲染页面使用的参数,变量

在models中添加 

def __str__(self):
    return self.title

就可以在admin后台看见每一条数据显示的内容

1,设计数据库字段,在model中设置表,字段,主键

2.创建迁移字段 python manage.py makemigrations

3.迁移字段    python manage.py migrate

数据库设计

1. 文章标题

2. 文章摘要

3. 文章内容

class Article(modelsModel):

    primary_key=true

test1223

django项目与应用

模型层

视图与模板

通过排序来选择最新的五篇文章

top5_article_list = Article.objects.order_by('-article_id')[:5]
paginator = Paginator(all_article, 3)
page_num = paginator.num_pages
page_article_list = paginator.page(page)
if page_article_list.has_next():
    next_page = page + 1
else:
    next_page = page
if page_article_list.has_previous():
    previous_page = page - 1
else:
    previous_page = page
return render(request, 'blog/index.html', {
    'article_list': page_article_list,
    'page_num': range(1, int(page_num) + 1),
    'curr_page': page,
    'previous_page': previous_page,
    'next_page': next_page,
    'top5_article_list': top5_article_list
})

实现分页按钮

设计？page= 的url

def get_index_page(request):
    page = request.GET.get('page')
    if page:
        page = int(page)
    else:
        page = 1
    all_article = Article.objects.all()
    paginator = Paginator(all_article, 3)
    page_num = paginator.num_pages
    page_article_list = paginator.page(page)
    if page_article_list.has_next():
        next_page = page + 1
    else:
        next_page = page
    if page_article_list.has_previous():
        previous_page = page - 1
    else:
        previous_page = page
    return render(request, 'blog/index.html', {
        'article_list': page_article_list,
        'page_num': range(1, int(page_num) + 1),
        'curr_page': page,
        'previous_page': previous_page,
        'next_page': next_page
    })

在文章详情页增加前后篇文章的跳转按钮

html改造

def get_detail_page(request, article_id):
    curr_article = None
    previous_article = None
    next_article = None
    previous_index = 0
    next_index = 0
    all_article = Article.objects.all()
    for index, article in enumerate(all_article):
        if index == 0:
            previous_index = 0
            next_index = index + 1
        elif index == len(all_article) - 1:
            previous_index = index - 1
            next_index = index
        else:
            previous_index = index - 1
            next_index = index + 1
        if article.article_id == article_id:
            curr_article = article
            previous_article = all_article[previous_index]
            next_article = all_article[next_index]
            break
    return render(request, 'blog/detail.html', {
        'curr_article': curr_article,
        'previous_article': previous_article,
        'next_article': next_article
    })

使用url来对指定文章的详情页进行访问

html加入a标签

是点击可以跳转链接