目标是动态更新upload_to,以便用户上传的文件存储在取决于用户的目录位置。网上有几个这样的例子,但没有一个使用 ModelForm。请参阅这两个问题的代码片段,一个是我得到了 instance.user 值的空字符串,当我尝试修复它时,表单无效。
# models.py
def get_file_path( instance, filename ):
# make the filepath include the signed in username
print "inst: %s" % instance.__dict__.keys()
print "inst:user:%s" % instance.user # <-- This is empty string!!
print "file: %s" % filename
return "%s/myapp/%s/%s" % ( settings.MEDIA_ROOT, instance.user, filename )
class trimrcUpload(models.Model):
user = models.CharField( max_length = 20 )
inputFile = models.FileField( upload_to = get_file_path )
# forms. py
class trimrcUploadForm(ModelForm):
class Meta:
model = trimrcUpload
exclude = ( 'resultFile', 'numTimesProcessed' )
# views.py
def myapp_upload( request, username, template_name="myapp/myapptemplate.html" ):
dummy = trimrcUpload( user=username )
if request.POST:
form = trimrcUploadForm( request.POST, request.FILES, instance=dummy )
if form.is_valid():
success = form.save()
success.save()
# form is not valid, user is field is "required"
# the user field is not displayed in the template by design,
# it is to be populated by the view (above).
# http://docs.djangoproject.com/en/1.0/topics/forms/modelforms/
# about halfway down there is a "Note" section describing the use of dummy.