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通過排序來選擇最新的五篇文章

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
})

實現分頁按鈕

設計？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
????})

在文章詳情頁增加前后篇文章的跳轉按鈕

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來對指定文章的詳情頁進行訪問

html加入a標簽

是點擊可以跳轉鏈接

使用模板系統實時的進行渲染

將數據通過

return?render(request,?'blog/detail.html',?{
????'curr_article':?curr_article
})

返回給頁面進行顯示

django的模板系統

網頁邏輯和網頁視圖應該分開設計

{{變量}}

?{%for x in list %},{% endfor %}

?{% if %},{% else %},?{% endif %}

使用bootstrap實現靜態博客頁面

簡單易上手

柵格系統

將頁面分為12份

使用django的模板來渲染頁面

進一步完成博客界面

def?article_content(request):
????article?=?Article.objects.all()[0]
????title?=?article.title
????brief_content?=?article.brief_content
????content?=?article.content
????article_id?=?article.article_id
????publish_date?=?article.publish_date
????return_str?=?'title:%s,brief_content:%s,content:%s,article_id:%s,publish_date:%s'?%?(title,?brief_content,?content,
?????????????????????????????????????????????????????????????????????????????????????????article_id,?publish_date)
????return?HttpResponse(return_str)

返回博客內容

django admin是自帶的后臺管理工具

自己在admin中注冊模板

from?.models?import?Article

admin.site.register(Article)

讓后臺管理顯示標題分辨不同文章

def?__str__(self):
????return?self.title

django shell

可以用于小范圍的debug

python manage.py shell

from blog.models import Article

a=Article()

a.title='Test shell'

a.brief_content='hello shell'

a.content='hello world hello django hello shell'

a.save()

print(Article.objects.all()[0].title)

博客包括

標題

摘要

內容

IntegerField

TextField

DateTimeField

AutoField自增

primary_key主鍵

創建模型

class?Article(models.Model):
????article_id=models.AutoField(primary_key=True)
????title=models.TextField()
????brief_content=models.TextField()
????content=models.TextField()
????publish_date=models.DateTimeField(auto_now=True)

命令生成遷移文件

python manage.py makemigrations

命令導入文件

python manage.py migrate

視圖層與數據庫中間是模型層

python與數據庫表之間轉換

屏蔽數據庫之間的差異

專注于業務邏輯的開發

模型層的定義

如何創建一個文章的模型層

了解django shell

django admin模塊了解

from?django.http?import?HttpResponse
#?Create?your?views?here.
def?hello_world(request):
????return?HttpResponse('hello?world')

urlpatterns=[
????path('hello_world',blog.views.hello_world)
]

完成項目路由，和應用路由對視圖函數的綁定