Django简单实现创建，更新，删除的功能，外加图片的简单处理
在开发walkerfree的过程中，我用到了Django这个框架，说实话，我用了使用了，都是滥用，喜欢自己写一些东西，于是有些Django写好的，比较方便的功能，没有去体会。好了长话短说，嘿嘿，看代码
第一个：添加条目的代码如下
@login_required
def gifts_add(request):
'''
Feeling的添加
'''
if request.user.is_authenticated():
user = request.user
else:
user = request.user
if request.method == 'POST':
form = GiftsCreateForm(request.POST, request.FILES)
if form.is_valid():
title = form.cleaned_data['title']
url_address = form.cleaned_data['url_address']
description = form.cleaned_data['description']
show = form.cleaned_data['show']
category = form.cleaned_data['category']
large_image = upload_image_file(request.FILES['large_image'], type='gifts',size_type='large',image_size=480)
middle_image = upload_image_file(request.FILES['middle_image'], type='gifts',size_type='middle',image_size=320)
small_image = upload_image_file(request.FILES['small_image'], type='gifts',size_type='small',image_size=200)
obj = Gifts(
title=title,
description = description,
url_address = url_address,
large_image = large_image,
middle_image = middle_image,
small_image = small_image,
is_show = show,
category_id = category,
user_id = user.id,
create_date = datetime.now().strftime("%Y-%m-%d %H:%I:%S"),
update_date = datetime.now().strftime("%Y-%m-%d %H:%I:%S"),
)
try:
obj.save()
return HttpResponseRedirect(reverse('accounts_gifts'))
except:
return HttpResponseRedirect(reverse('accounts_gifts'))
else:
form = GiftsCreateForm()
return render_to_response('accounts/gifts_add.html',{'user':user,'action':'gifts', 'form':form},context_instance=RequestContext(request))第二个：更新条目的代码
@login_required
def gifts_update(request,id):
'''
Feeling的更新
'''
if request.user.is_authenticated():
user = request.user
obj = Gifts.objects.filter(id=id,user_id=user.id).get()
if request.method == 'POST':
if request.POST['title']:
obj.title = request.POST['title']
if request.POST['url_address']:
obj.url_address = request.POST['url_address']
if request.POST['show']:
obj.is_show = request.POST['show']
if request.POST['category']:
obj.category_id = request.POST['category']
if 'large_image' in request.FILES:
#删除文件
delete_image_file("%s" % obj.large_image)
#存储文件
large_image = upload_image_file(request.FILES['large_image'], type='gifts',size_type='large',image_size=480)
obj.large_image = large_image
if 'middle_image' in request.FILES:
#删除文件
delete_image_file("%s" % obj.middle_image)
#存储文件
middle_image = upload_image_file(request.FILES['middle_image'], type='gifts',size_type='middle',image_size=320)
obj.middle_image = middle_image
if 'small_image' in request.FILES:
#删除文件
delete_image_file("%s" % obj.small_image)
#存储文件
small_image = upload_image_file(request.FILES['small_image'], type='gifts',size_type='small',image_size=200)
obj.small_image = small_image
obj.save()
return HttpResponseRedirect(reverse('accounts_gifts'))
else:
show = {}
show[0] = u'显示'
show[1] = u'不显示'
category = {0:u'时尚女装',1:u'帅气男装',2:u'精品箱包'}
return render_to_response('accounts/gifts_update.html',{'user':user,'action':'gifts','obj':obj,'show':show,'category':category},context_instance=RequestContext(request))
else:
return HttpResponseRedirect(reverse('home'))第三个：删除条目的代码：
@login_required
def gifts_delete(request,id):
'''
Feeling的删除
'''
if request.user.is_authenticated() and request.method == 'POST':
user = request.user
try:
#查找需要的Item
obj = Gifts.objects.filter(id=id, user_id=user.id).get()
delete_image_file("%s" % obj.large_image)
delete_image_file("%s" % obj.middle_image)
delete_image_file("%s" % obj.small_image)
Gifts.objects.filter(id=id,user_id=user.id).delete()
json_data = simplejson.dumps({'message':u'操作成功','status_code':1})
return HttpResponse(json_data,mimetype='application/json')
except Exception, data:
json_data = simplejson.dumps({'message':u'操作失败','status_code':0,'data':data})
return HttpResponse(json_data,mimetype='application/json')
else:
json_data = simplejson.dumps({'message':u'操作失败','status_code':0})
return HttpResponse(json_data,mimetype='application/json')第四个:添加图片的代码
def upload_image_file(file, type='gifts',size_type='large',image_size = 480):
'''文件上传函数,上传的文件夹一定要存在'''
if file:
size = image_size
parser = ImageFile.Parser()
for content in file.chunks():
parser.feed(content)
img = parser.close()
width, height = img.size
if width > size:
delta = width / size
height = int(height / delta)
img.thumbnail((size, height), Image.ANTIALIAS)
name, ext = os.path.splitext(os.path.basename(file.name))
name = uuid.uuid4().hex
now = datetime.now()
datetime_path = '/%s/%s/%s' % (now.year, now.month, now.day)
file_dir_path = 'upload/'+type+ '/' +size_type + datetime_path + '/'
full_file_dir_path = os.path.join(MEDIA_ROOT, file_dir_path)
#要存储的文件的名字
file_name = name + '_' + size_type +ext
#如果目录不存在则创建
if os.path.exists(full_file_dir_path) == False:
os.makedirs(full_file_dir_path,0777)
#保存到数据库的名字
save_file_name = os.path.join(file_dir_path ,file_name)
#存储到服务器的文件名字
path_name = os.path.join(full_file_dir_path, file_name)
img.save(path_name)
return(save_file_name)第五个：删除图片的代码：
def delete_image_file(file_path, type='gifts',size_type='large',image_size = 480):
'''
删除文件
'''
#/home/davidzhang/walkerfree/media/upload/large/T2DdJiXlXOXXXXXXXX_499983611_large_large_large_large_large.jpg
file_full_path = os.path.join(MEDIA_ROOT, file_path)
if os.path.exists(file_full_path):
if os.path.isfile(file_full_path):
#return file_full_path
os.remove(file_full_path)
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由 davidzhang创作并维护的 Gowhich博客采用创作共用保留署名-非商业-禁止演绎4.0国际许可证。
本文首发于
博客（
https://www.gowhich.com ），版权所有，侵权必究。
本文永久链接： https://www.gowhich.com/blog/426
版权声明
由 davidzhang创作并维护的 Gowhich博客采用创作共用保留署名-非商业-禁止演绎4.0国际许可证。
本文首发于 Gowhich博客（ https://www.gowhich.com ），版权所有，侵权必究。
本文永久链接： https://www.gowhich.com/blog/426