【发布时间】：2015-03-30 23:36:02
【问题描述】：
我有一个包含大约 10 个字段的表单，其中 3 个是文件字段。
当我创建新记录时，没问题。 当我更新所有字段时，没问题。 当我只更新 3 个文件字段而不更新其他字段时，没问题。 但是如果我在模板中将一个文件字段留空，我会得到 MultiValueDictKeyError。 这并不酷，因为我希望用户能够上传或更新他们喜欢的任何字段，无论是 1 或 3 还是所有字段。
我到处搜索，但在任何地方都找不到这个确切的问题。任何帮助将不胜感激。
请原谅我冗长的代码。我是初学者。 形式是这样的……
class DocumentForm(forms.Form):
price= forms.IntegerField(max_value=1000, min_value=1,
label='1. Set Price in $',
help_text='*')
docfile = forms.FileField(allow_empty_file= True,
label='3 Upload file 1',
help_text='*')
docfile1 = forms.FileField(allow_empty_file= True,
label='2. Upload file2',
help_text='*')
docfile2=forms.FileField(allow_empty_file= True,
label='4. Upload a file ',
help_text='*')
name= forms.CharField(widget=forms.TextInput,help_text='*')
description=forms.CharField(widget=forms.Textarea,help_text='*')
RADIO_CHOICES = (
('none', "No Category"),
('one', "Music"),
('two', "Movie"),
('three', "Tutorial "),
)
category=forms.ChoiceField(
choices=RADIO_CHOICES,
widget=forms.RadioSelect(),
label ='7. Select a Category for your upload',
required=False,
initial=False,
)
isover18s = forms.BooleanField(
label='8. Is over 18 content advised?',
required=False,
initial=False
)
模型是这样的......
class Document(models.Model):
docfile1 =models.FileField(blank=True,null=True,upload_to= 'MEDIA_ROOT/documents/%Y/%m/%d',)
docfile = models.FileField(blank=True,null=True,upload_to= 'MEDIA_ROOT/documents/%Y/%m/%d',)
docfile2 =models.FileField(blank=True, null=True,upload_to= 'MEDIA_ROOT/documents/%Y/%m/%d',)
category= models.CharField(max_length=100, null=False, blank=False)
usersname =models.CharField(max_length=100, null=False, blank=False)
name= models.CharField(max_length=100, null=False, blank=False)
description=models.CharField(max_length=300, null=False, blank=False)
isover18s =models.BooleanField(default=False, verbose_name = "Over 18 Content advised?")
price=models.IntegerField(verbose_name="Price is in Dollars MAX is $999")
dateUploaded=models.DateTimeField(auto_now_add=True, auto_now=False)
preview_views=models.IntegerField(verbose_name="Pre Views")
views=models.IntegerField(verbose_name="Views")
视图很啰嗦，因为另一个视图使用相同的表单用于不同的目的，我不好。反正就是这样……
def edit_preview(request, document_id):
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
form.fields['docfile'].required = False
form.fields['docfile1'].required = False
form.fields['docfile2'].required = False
form.fields['category'].required = False
form.fields['price'].required = False
form.fields['description'].required = False
form.fields['name'].required = False
if form.is_valid():
newdoc = Document.objects.get(id=document_id)
newdoc.usersname = request.user.username
newdoc = Document(docfile = request.FILES['docfile'])
if newdoc.docfile:
myfile=newdoc.docfile
newdoc = Document(docfile1 = request.FILES['docfile1'])
if newdoc.docfile1:
myfile1=newdoc.docfile1
newdoc = Document(docfile2 = request.FILES['docfile2'])
if newdoc.docfile2:
myfile2= newdoc.docfile2
newdoc = Document.objects.get(id=document_id)
newdoc.usersname = request.user.username
if myfile:
newdoc.docfile = myfile
if myfile:
newdoc.docfile1 = myfile1
if myfile:
newdoc.docfile2 = myfile2
newdoc.price=request.POST.get('price','')
newdoc.category= request.POST.get('category','')
newdoc.isover18s =request.POST.get('isover18s','')
newdoc.name =request.POST.get('name','')
newdoc.description =request.POST.get('description','')
form.clean_content()
if myfile:
newdoc.save(update_fields=['docfile'])
if myfile1:
newdoc.save(update_fields=['docfile1'])
if myfile2:
newdoc.save(update_fields=['docfile2'])
if request.POST.get('price'):
newdoc.save(update_fields=['price'])
if request.POST.get('category'):
newdoc.save(update_fields=['category'])
if request.POST.get('isover18s'):
newdoc.save(update_fields=['isover18s'])
if request.POST.get('name'):
newdoc.save(update_fields=['name'])
if request.POST.get('description'):
newdoc.save(update_fields=['description'])
document = Document.objects.get(id=document_id)
form = DocumentForm()
return render_to_response(
'edit_preview.html',
{'document': document, 'form': form},
context_instance=RequestContext(request)
)
模板表单太大且太乱，我似乎无法正确粘贴。希望有人可以提供帮助。
感谢一百万@knbk 这就是我将视图更改为的内容，它现在可以 100% 工作...
def edit_preview(request, document_id):
if request.method == 'POST':
form = DocumentForm(request.POST, request.FILES)
form.fields['docfile'].required = False
form.fields['docfile1'].required = False
form.fields['docfile2'].required = False
form.fields['category'].required = False
form.fields['price'].required = False
form.fields['description'].required = False
form.fields['name'].required = False
if form.is_valid():
newdoc = Document.objects.get(id=document_id)
newdoc.usersname = request.user.username
if request.FILES.get('docfile'):
myfile=request.FILES.get('docfile')
else:
myfile=None
if request.FILES.get('docfile1'):
myfile1=request.FILES.get('docfile1')
else:
myfile1=None
if request.FILES.get('docfile2'):
myfile2=request.FILES.get('docfile2')
else:
myfile2=None
if myfile:
newdoc.docfile = myfile
if myfile1:
newdoc.docfile1 = myfile1
if myfile2:
newdoc.docfile2 = myfile2
newdoc.price=request.POST.get('price','')
newdoc.category= request.POST.get('category','')
newdoc.isover18s =request.POST.get('isover18s','')
newdoc.name =request.POST.get('name','')
newdoc.description =request.POST.get('description','')
form.clean_content()
if myfile:
newdoc.save(update_fields=['docfile'])
if myfile1:
newdoc.save(update_fields=['docfile1'])
if myfile2:
newdoc.save(update_fields=['docfile2'])
if request.POST.get('price'):
newdoc.save(update_fields=['price'])
if request.POST.get('category'):
newdoc.save(update_fields=['category'])
if request.POST.get('isover18s'):
newdoc.save(update_fields=['isover18s'])
if request.POST.get('name'):
newdoc.save(update_fields=['name'])
if request.POST.get('description'):
newdoc.save(update_fields=['description'])
p =request.POST.get('docfile')
document = Document.objects.get(id=document_id)
form = DocumentForm()
return render_to_response(
'edit_preview.html',
{'document': document, 'form': form},
context_instance=RequestContext(request)
)
【问题讨论】：