我有模特:
class OpenCv(models.Model):
created_by = models.ForeignKey(User, blank=True)
first_name = models.CharField(('first name'), max_length=30, blank=True)
last_name = models.CharField(('last name'), max_length=30, blank=True)
url = models.URLField(verify_exists=True)
picture = models.ImageField(help_text=('Upload an image (max %s kilobytes)' %settings.MAX_PHOTO_UPLOAD_SIZE),upload_to='jakido/avatar',blank=True, null= True)
bio = models.CharField(('bio'), max_length=180, blank=True)
date_birth = models.DateField(blank=True,null=True)
domain = models.CharField(('domain'), max_length=30, blank=True, choices = domain_choices)
specialisation = models.CharField(('specialization'), max_length=30, blank=True)
degree = models.CharField(('degree'), max_length=30, choices = degree_choices)
year_last_degree = models.CharField(('year last degree'), max_length=30, blank=True,choices = year_last_degree_choices)
lyceum = models.CharField(('lyceum'), max_length=30, blank=True)
faculty = models.ForeignKey(Faculty, blank=True,null=True)
references …我在我的服务器上上传了一些.doc和.txt文件,我想有两个选择: - 用户能够下载文件 - 用户能够在线阅读我已经阅读了一些代码对于下载功能,但它似乎不起作用.
我的代码:
def download_course(request, id):
course = Courses.objects.get(pk = id)
response = HttpResponse(mimetype='application/force-download')
response['Content-Disposition'] = 'attachment; filename=%s' % smart_str(file_name)
response['X-Sendfile'] = smart_str(/root/)
return response
def save_course(request, classname):
classroom = Classroom.objects.get(classname = classname)
if request.method == 'POST':
form = CoursesForm(request.POST, request.FILES)
if form.is_valid():
handle_uploaded_file(request.FILES['course'])
new_obj = form.save(commit=False)
new_obj.creator = request.user
new_obj.classroom = classroom
new_obj.save()
return HttpResponseRedirect('.')
else:
form = CoursesForm()
return render_to_response('courses/new_course.html', {
'form': form,
},
context_instance=RequestContext(request))
def handle_uploaded_file(f):
destination = open('root', 'wb+')
for chunk in f.chunks(): …我正在尝试将文本文件上传到指定位置,但文件在根目录中上传空(不在我指定的位置).
在模型中:
course = models.FileField(help_text=('Upload a course (max %s kilobytes)' %settings.MAX_COURSE_UPLOAD_SIZE),upload_to='cfolder/',blank=True)
形式:
def handle_uploaded_file(f):
destination = open('Cfolder')
for chunk in f.chunks():
destination.write(chunk)
destination.close()
在观点中:
def save_course(request, classname):
classroom = Classroom.objects.get(classname = classname)
if request.method == 'POST':
form = CoursesForm(request.POST, request.FILES)
if form.is_valid():
handle_uploaded_file(request.FILES['course'])
new_obj = form.save(commit=False)
new_obj.creator = request.user
new_obj.classroom = classroom
new_obj.save()
return HttpResponseRedirect('.')
else:
form = CoursesForm()
return render_to_response('courses/new_course.html', {
'form': form,
},
context_instance=RequestContext(request))
我想我的错误是在handle_uploaded_file方法中.我应该如何修改它才能正常工作？谢谢!
如果我有一个问答系统,并且我想添加一个标签功能,就每个问题我应该有一些标签,用逗号分隔(就像Stackoverflow一样):
我应该在表单中使用什么,以便用逗号分隔的标签保存在数据库中,每个标签都注册？(便于搜索)
谢谢
如果我对多个表有查询,例如:
d = Relations.objects.filter(follow = request.user).filter(date_follow__lt = last_checked)
r = Reply.objects.filter(reply_to = request.user).filter(date_reply__lt = last_checked)
article = New.objects.filter(created_by = request.user)
vote = Vote.objects.filter(voted = article).filter(date__lt = last_checked)
我希望显示按日期排序的所有结果(我的意思是不列出所有回复,然后是所有投票等).不知何故,我想在一个查询集中"加入所有这些结果".有可能吗？
我在调用从另一个函数返回结果的函数时遇到问题
为了说清楚,我的职责是:
def calculate_questions_vote(request):
useranswer = Answer.objects.filter (answer_by = request.user)
positive_votes = VoteUpAnswer.objects.filter(answer = useranswer)
negative_votes = VoteDownAnswer.objects.filter(answer = useranswer)
question_vote_rank = sum(positive_votes) - sum(negative_votes.count)
return question_vote_rank
def calculate_replies(request):
the_new = News.objects.filter(created_by = request.user)
reply = Reply.objects.filter(reply_to = the_new)
reply_rank = sum(reply)
return reply_rank
我想在另一个函数中调用它们,以便它可以返回一个值.我正在调用函数形式这样的另一个函数:
rank = calculate_questions_vote
假设我现在只想显示函数calculate_questions_vote返回的值.当然,我将rank变量放在函数的上下文中.
我的问题是我的输出是:
<function calculate_questions_vote at 0x9420144>
我怎样才能实际显示函数返回的值,而不是该字符串？
有没有人有一个在kohana 3中上传图像的例子,最终没有使用任何模块？
我使用https://github.com/kohana/image/tree/3.1%2Fmaster,但我的错误是:致命错误:未捕获Kohana_Exception [0]:已安装的GD不支持图像
有没有简单快捷的方法在基于kohana 3的网站上传文件？
谢谢!