我对 python 和 Django 比较陌生。
表单正在显示自己，但是当我选择一个文件并点击保存时，表单会自行刷新，并且 FormField 中的选定文件会消失，并且表单说该文件是必需的。
代码是：
模型.py
class ScribbleMedia(models.Model):
media = models.FileField(upload_to='photos')
def __unicode__(self):
return self.media
class Scribble(models.Model):
body = models.TextField()
user = models.ForeignKey(User)
media = models.ForeignKey(ScribbleMedia)
def __unicode__(self):
return u'%s, %s' % (self.user.username, self.media)
class Tag(models.Model):
name = models.CharField(max_length=64, unique= True)
scribbles = models.ManyToManyField(Scribble)
def __unicode__(self):
return self.name
视图.py
def scribbler_save_page(request):
if request.method == 'POST':
form = ScribbleSaveForm(request.POST)
if form.is_valid():
#Create or get media.
media, dummy = ScribbleMedia.objects.get_or_create(
media=form.cleaned_data['media']
)
#Create or get media.
scribble, created=Scribble.objects.get_or_create(
user=request.user,
media=media
)
#update scribble body
scribble.body=form.cleaned_data['body']
# If the scibble is being updated, clear old tag list.
if not created:
scribble.tag_set.clear()
# Create new tag list.
tag_names = form.cleaned_data['tags'].split()
for tag_name in tag_names:
tag, dummy = Tag.objects.get_or_create(name=tag_name)
scribble.tag_set.add(tag)
# Save scribble to database.
scribble.save()
return HttpResponseRedirect ( '/user/%s/' % request.user.username
)
else:
form = ScribbleSaveForm()
variables = RequestContext (request, {
'form': form
})
return render_to_response ('scribble_save.html', variables)
表格.py
class ScribbleSaveForm(forms.Form):
media=forms.FileField(
label=u'add file',
widget=forms.FileInput()
)
text=forms.CharField(
label=u'description',
widget=forms.Textarea()
)
tags=forms.CharField(
label=u'Tags',
required=False,
widget=forms.TextInput(attrs={'size':64})
)
网址.py
(r'^save/$', scribbler_save_page),
scribble_save.html
{% extends "base.html" %}
{% block title %}Save Scribble {% endblock %}
{% block head %}Save Scribble { % endblock % }
{% block content %}
<form method="post" action=".">
{{ form.as_p }}
<input type="submit" value="save" />
{% csrf_token %}
</form>
{% endblock %}