Python manage.py shell#進入SQL的shell

p=Publisher(id=2,name='Lee',address='C',city='C',country='C',state_province='C',website='https://www.baidu.com')
p.save()

Publisher.objects.filter(name='Lee') #相當於SQL的where
Publisher.objects.filter(name__contains='L')#相當於SQL的LIKE %like% 
Publisher.objects.order_by("name")#SQL的order by
#連鎖查詢
Publisher.objects.filter(name='L').order_by('name') #where 和 order by的組合
Publisher.objects.order_by(name='L')[0]#相當於limit 1
Publisher.objects.order_by(name='L')[0::2]#相當於offset 0 limit 2
#錯誤示範
Publisher.objects.order_by(name='L')[-1] #錯誤,沒有負索引
#更新物件
p=Publisher.objects.get(name='L') 
p.name='Lee'
p.save()
publisher.objects.get(name='L').update(name='Lee')
#刪除物件delete
 

利用admin更改網頁

#將頁面改成中文 setting.py
LANGUAGE_CODE = 'zh-hans'

#在app裡面的models.py
@admin.register(Book)
class BookAdmin(admin.ModelAdmin):#都要以元祖tuple,dict為內容填充
    list_display = (['id','title','publishion_date'])#呈現的內容
    list_per_page = 20#能顯示最大的數目條
    ordering = (['id','publishion_date'])#以什麼為排序條件
    list_editable = (['title'])#可以直接編輯的
    list_filter = ['publishion_date']#以什麼為過濾條件

 

要是之前註冊過要先解綁

admin.site.unregister(Book)

效果圖如下