setting.py部分代码：
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',
'Book.apps.BookConfig',
]
DATABASES = {
# 'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
# },
'default': {
# 'ENGINE': 'django.db.backends.sqlite3',
# 'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
'ENGINE': 'django.db.backends.mysql',
# 数据库引擎
'NAME': 'bookdate',
# 数据库名字
'USER': 'root',
# 链接数据库用户名
'PASSWORD': 'Sloveb55555..',
# 链接数据库密码
'HOST': '127.0.0.1',
# 数据库链接地址
'POST': '3306',
# 数据库链接端口
}
}
LANGUAGE_CODE = 'zh-hans'
TIME_ZONE = 'Asia/Shanghai'
USE_I18N = True
USE_L10N = True
USE_TZ = False
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/3.0/howto/static-files/
STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static')
]
MEDIA_ROOT = os.path.join(BASE_DIR, 'static/uploads')
---------------------------------------------------------------------------------------------------------------------------
主路由：
from django.contrib import admin
from django.urls import path, include
urlpatterns = [
path('admin/', admin.site.urls),
path('book/', include(('Book.urls', 'book'), namespace='book')),
]
---------------------------------------------------------------------------------------------------------------------------
__init__.py:代码
import pymysql pymysql.install_as_MySQLdb()
----------------------------------------------------------------------------------------------------------------------------
分支路由：
urlpatterns = [
url('getbook/', views.get_book, name='get_book'),
url('addbook/', views.add_book, name='add_book'),
url('delbook/', views.del_book, name='del_book'),
url('delallbook/', views.del_allbook, name='del_allbook'),
url('updatebook/', views.update_book, name='update_book'),
]
----------------------------------------------------------------------------------------------------------------------------
models.py 数据表
class Books(models.Model):
# 图书ID：默认自动创建，这里手动创建
booksid = models.AutoField(primary_key=True, unique=True, null=False, max_length=11)
# 图书种类:如果用默认值就必须得用max_length
booksspecies = models.CharField(max_length=6, default='计算机')
# 图书名称,null=False:不允许为空值，unique=True:不允许重复
booksname = models.CharField(max_length=16, null=False, unique=True)
# 图书几本
booksnumber = models.IntegerField(null=False)
# 图书国籍:中国,美国,英国
bookscountry = models.CharField(max_length=4, null=False)
# 图书是否入库:默认值没有入库
booksstorage = models.BooleanField(default=False)
# 图书价格
booksmoney = models.CharField(max_length=10, null=False)
# 添加图书时间:auto_now_add:第一次创建的时候自动设置当前日期，默认值：false
bookstimes = models.DateTimeField(auto_now=True)
#图书图片名称
booksimg_name=models.CharField(max_length=30, null=False, unique=True)
# 图书图片:upload_to='%Y/%m/%d/icons'每张图片都有自己独立的按时间日期的文件夹，当天上传的图片都放在一个文件夹当中
booksimg = models.FileField(null=True,upload_to='%Y/%m/%d/pic')
class Meta:
# 更改表名称为Books，如果不更改就是，App名_models类名。
db_table = 'Books'
----------------------------------------------------------------------------------------------------------------------------
views.py 视图
import os
from django.core.paginator import Paginator, PageNotAnInteger, EmptyPage
from django.shortcuts import render, redirect
from django.urls import reverse
from Book.models import Books
def get_book(request):
course_list = Books.objects.all().order_by("booksid")
paginator = Paginator(course_list, 10)
page = request.GET.get("page", 1)
currentPage = int(page)
try:
video_list = paginator.page(page)
except PageNotAnInteger:
video_list = paginator.page(1)
except EmptyPage:
video_list = paginator.page(paginator.num_pages)
return render(request, 'allbooks.html', locals())
def add_book(request):
if request.method == "GET":
return render(request, 'booksadd.html')
elif request.method == "POST":
booksname = request.POST.get("booksname")
booksnumber = request.POST.get("booksnumber")
bookscountry = request.POST.get("bookscountry")
booksstorage = request.POST.get("booksstorage")
booksmoney = request.POST.get("booksmoney")
money = format(float(booksmoney), '.2f')
booksimg_name = request.POST.get("booksimg_name")
booksimg = request.FILES.get("booksimg")
max_upload_size = 5242880
extenedname = booksimg_name[booksimg_name.rindex('.') + 1:]
allowedname = ['jpg', 'png', 'pdf', 'txt', 'zip']
if extenedname not in allowedname or (booksimg.size > max_upload_size):
return render(request, 'booksadd.html')
# 使用try...except的原因是注册的用户名有可能会一样,except Exception as ex:是捕获所有异常
try:
st_save = Books()
st_save.booksname = booksname
st_save.booksnumber = booksnumber
st_save.bookscountry = bookscountry
st_save.booksstorage = booksstorage
st_save.booksmoney = money
st_save.booksimg_name = booksimg_name
st_save.booksimg = booksimg
st_save.save()
except Exception as ex:
return redirect(reverse("book:add_book"))
return redirect(reverse("book:get_book"))
def update_book(request):
if request.method == "GET":
getbooksid = request.GET.get("booksid")
ob = Books.objects.get(booksid=getbooksid)
context = {'data': ob}
return render(request, 'booksupdate.html', context)
elif request.method == "POST":
try:
postbooksid = request.POST.get("booksid")
obs = Books.objects.get(booksid=postbooksid)
obs.booksname = request.POST['booksname']
obs.booksnumber = request.POST['booksnumber']
obs.bookscountry = request.POST['bookscountry']
obs.booksstorage = request.POST['booksstorage']
obs.booksmoney = format(float(request.POST['booksmoney']), '.2f')
obs.booksimg_name = request.POST['booksimg_name']
max_upload_size = 5242880
extenedname = obs.booksimg_name[obs.booksimg_name.rindex('.') + 1:]
allowedname = ['jpg', 'png', 'pdf', 'txt', 'zip']
# 判断获取的文件后缀名是否在allowedname中
if extenedname not in allowedname:
ob = Books.objects.get(booksid=postbooksid)
context = {'data': ob}
return render(request, 'booksupdate.html', context)
# 如果获取表单文件==None，获取原有数据赋值给obs.booksimg。None是指字段里的值是空白不是null。
if request.FILES.get("booksimg") == None:
path_none = str(obs.booksimg)
obs.booksimg = path_none
obs.save()
if request.FILES.get("booksimg") != "":
path_null = str(obs.booksimg)
obs.booksimg = path_null
obs.save()
# 再如果获取表单文件的大小大于初始值max_upload_size:将进行返回所有数据重新上传文件
elif request.FILES.get("booksimg").size > max_upload_size:
ob = Books.objects.get(booksid=postbooksid)
context = {'data': ob}
return render(request, 'booksupdate.html', context,)
# 再如果获取表单文件！= obs.booksimg原有数据，则进行删除原有目录和文件名，并且把新获取到的目录和文件名进行更新
elif request.FILES.get("booksimg") != obs.booksimg:
path_booksimg = 'static/uploads/' + str(obs.booksimg)
os.remove(path_booksimg)
obs.booksimg = request.FILES.get("booksimg")
obs.save()
return redirect(reverse('book:get_book'))
except Exception as ex:
booksid = request.POST.get("booksid")
ob = Books.objects.get(booksid=booksid)
context = {'user': ob}
return render(request, 'booksupdate.html', context)
def del_book(request):
id = request.GET.get("booksid")
onedelete = Books.objects.get(booksid=id)
book = onedelete.booksimg
path = 'static/uploads/' + str(book)
onedelete.delete()
os.remove(path)
return redirect(reverse("book:get_book"))
def del_allbook(request):
if request.method == "GET":
return render(request, 'allbooks.html')
elif request.method == "POST":
ids = request.POST.getlist('booksid')
for i in ids:
deletesql = Books.objects.get(booksid=i)
book = deletesql.booksimg
path = 'static/uploads/' + str(book)
deletesql.delete()
os.remove(path)
return redirect(reverse('book:get_book'))