我正试图处理上传Django中的文件,我遇到了一个障碍。我的目标是创建一个表单,允许用户上传文本和文件数据,预览该输入,然后发布它。如何在Django模板中发布隐藏的FileFields?
我把所有的逻辑放在一个视图中,并且有多个模板与各种提交按钮相关联。我不想保存所有实例,然后为发布的帖子创建自定义管理器。但是,也许我应该这样做。
我的问题是我的文件formset无法正常工作。当我刚刚提交数据时,没有预览它,就没有问题。但是,有一次,我开始发回到不同的模板,它停止工作。我知道你希望在POST后使用HttpResponseRedirect,但是我认为在这种情况下我的方法很好。我真的没有线索。
这是我的观点的逻辑
def post(request):
page="post"
#check if user has already posted and if so, direct them to their account post history page
try:
user=User.objects.get(pk=request.user.id)
except User.DoesNotExist:
user=''
if user:
try:
post=user.post_set.all()[0]
return HttpResponseRedirect("/profile/post/")
#Here a user who has not posted is shown a form to do so
except IndexError:
postform=PostForm(prefix="post")
PhotoFormSet=modelformset_factory(Post_Photo,exclude=('post',), extra=4, max_num=4)
photo_formset=PhotoFormSet(queryset=Post_Photo.objects.filter(post__lt=0),prefix="photos") #lt 0 is a hack to return an empty query set, so that other photos aren't returned with the form
#Here an anonymous user sees the form, though they can't successfully submit
else:
postform=PostForm(prefix="post")
PhotoFormSet=modelformset_factory(Post_Photo,exclude=('post',), extra=4, max_num=4)
photo_formset=PhotoFormSet(queryset=Post_Photo.objects.filter(post__lt=0),prefix="photos")
if request.method=='POST' and user and request.POST.get('preview'):
photo_formset=PhotoFormSet(request.POST, request.FILES, prefix="photos")
postform=PostForm(request.POST,prefix="post")
if postform.is_valid() and photo_formset.is_valid():
post=postform.save(commit=False)
photos=photo_formset.save(commit=False)
return render_to_response('website/preview_post.html', {'page':page,'post':post,'photos':photos,'photo_formset':photo_formset}, context_instance=RequestContext(request))
else:
return HttpResponse('error test')
if request.method=='POST' and user and request.POST.get('edit'):
photo_formset=PhotoFormSet(request.POST, request.FILES, prefix="photos")
postform=PostForm(request.POST,prefix="post")
neighborhood=request.POST.get('post-neighborhood','')
if postform.is_valid() and photo_formset.is_valid():
return render_to_response('website/post_upload.html', {'page':page, 'neighborhood':neighborhood,'postform':postform, 'photo_formset':photo_formset}, context_instance=RequestContext(request))
else:
return HttpResponse(postform.errors)
if request.method=='POST' and user and request.POST.get('publish'):
photo_formset=PhotoFormSet(request.POST, request.FILES, prefix="photos")
postform=PostForm(request.POST,prefix="post")
if postform.is_valid() and photo_formset.is_valid():
post=postform.save(commit=False)
post.user=user
post.save()
photos=photo_formset.save(commit=False)
for photo in photos:
photo.post=post
photo.save()
return HttpResponse('/post_upload/?success=1')
else:
return HttpResponse('%s' %postform.errors)
return render_to_response("website/post_upload.html", {'page':page,'postform':postform,'photo_formset':photo_formset}, context_instance=RequestContext(request))
在我的预览模板,我包括隐藏的输入,然后POST方法要么返回到编辑页面或出版。我的photo_formset被包含在一个带有display:none属性的div中,因此它是不可见的。
当我从编辑页面POST时,隐藏文本输入通过,但FILE输入不通过。我能做些什么呢?
感谢
是的,我假定表单实例会自动填充文件输入。这很有帮助。那么,如果我想显示图像的预览,我将不得不暂时保存它,对吗? – Ben 2011-03-22 19:49:14
没有办法解决它,它似乎 – Ben 2011-03-22 19:50:23
我认为不 - 先保存并稍后再将其保存,将其存储为大量文本或使用ajax预览。我喜欢ajax方法! – 2011-03-23 01:32:02