无法使用图像验证django表单

我在制作表格时遇到了麻烦。在我看来，一切都很好，但是

is\u valid（）

总是返回False（我必须在shell模式下检查它，因为在模板中它没有显示任何错误）。我错过什么了吗

如果有人想测试它，可以从

forms.py

from django.forms import ModelForm
from e_cidadania.apps.spaces.models import Space

class SpaceForm(ModelForm):
    class Meta:
        model = Space

@permission_required('Space.add_space')
def create_space(request):

space = Space()
if request.POST:
    form = SpaceForm(request.POST, request.FILES, instance=space)
    if form.is_valid():
        handle_uploaded_file(request.FILES['file'])
        form.author = request.user
        form.date = datetime.datetime.now()
        form.save()
        return render_to_response('/')
else:
    form = SpaceForm()
return render_to_response('spaces/add.html',
                         {'form': form},
                         context_instance=RequestContext(request)) 

class Space(models.Model):

    name = models.CharField(_('Name'), max_length=100, unique=True,
                            help_text=_('All lowercase. Obligatory.'))
    description = models.TextField(_('Description'))
    date = models.DateTimeField(auto_now_add=True)
    author = models.ForeignKey(User, verbose_name=_('Author'))
    logo = models.ImageField(upload_to='spaces/logos',
                             verbose_name=_('Logotype'),
                             help_text=_('100px width, 75px height'))
    banner = models.ImageField(upload_to='spaces/banners',
                               verbose_name=_('Banner'),
                               help_text=_('75px height'))
    authorized_groups = models.ManyToManyField(Group,
                                               verbose_name=_('Authorized groups'))

    mod_debate = models.BooleanField(_('Debate module'))
    mod_proposals = models.BooleanField(_('Proposals module'))
    mod_news = models.BooleanField(_('News module'))
    mod_cal = models.BooleanField(_('Calendar module'))
    mod_docs = models.BooleanField(_('Documents module'))

视图.py

from django.forms import ModelForm
from e_cidadania.apps.spaces.models import Space

class SpaceForm(ModelForm):
    class Meta:
        model = Space

@permission_required('Space.add_space')
def create_space(request):

space = Space()
if request.POST:
    form = SpaceForm(request.POST, request.FILES, instance=space)
    if form.is_valid():
        handle_uploaded_file(request.FILES['file'])
        form.author = request.user
        form.date = datetime.datetime.now()
        form.save()
        return render_to_response('/')
else:
    form = SpaceForm()
return render_to_response('spaces/add.html',
                         {'form': form},
                         context_instance=RequestContext(request)) 

class Space(models.Model):

    name = models.CharField(_('Name'), max_length=100, unique=True,
                            help_text=_('All lowercase. Obligatory.'))
    description = models.TextField(_('Description'))
    date = models.DateTimeField(auto_now_add=True)
    author = models.ForeignKey(User, verbose_name=_('Author'))
    logo = models.ImageField(upload_to='spaces/logos',
                             verbose_name=_('Logotype'),
                             help_text=_('100px width, 75px height'))
    banner = models.ImageField(upload_to='spaces/banners',
                               verbose_name=_('Banner'),
                               help_text=_('75px height'))
    authorized_groups = models.ManyToManyField(Group,
                                               verbose_name=_('Authorized groups'))

    mod_debate = models.BooleanField(_('Debate module'))
    mod_proposals = models.BooleanField(_('Proposals module'))
    mod_news = models.BooleanField(_('News module'))
    mod_cal = models.BooleanField(_('Calendar module'))
    mod_docs = models.BooleanField(_('Documents module'))

型号.py

from django.forms import ModelForm
from e_cidadania.apps.spaces.models import Space

class SpaceForm(ModelForm):
    class Meta:
        model = Space

@permission_required('Space.add_space')
def create_space(request):

space = Space()
if request.POST:
    form = SpaceForm(request.POST, request.FILES, instance=space)
    if form.is_valid():
        handle_uploaded_file(request.FILES['file'])
        form.author = request.user
        form.date = datetime.datetime.now()
        form.save()
        return render_to_response('/')
else:
    form = SpaceForm()
return render_to_response('spaces/add.html',
                         {'form': form},
                         context_instance=RequestContext(request)) 

class Space(models.Model):

    name = models.CharField(_('Name'), max_length=100, unique=True,
                            help_text=_('All lowercase. Obligatory.'))
    description = models.TextField(_('Description'))
    date = models.DateTimeField(auto_now_add=True)
    author = models.ForeignKey(User, verbose_name=_('Author'))
    logo = models.ImageField(upload_to='spaces/logos',
                             verbose_name=_('Logotype'),
                             help_text=_('100px width, 75px height'))
    banner = models.ImageField(upload_to='spaces/banners',
                               verbose_name=_('Banner'),
                               help_text=_('75px height'))
    authorized_groups = models.ManyToManyField(Group,
                                               verbose_name=_('Authorized groups'))

    mod_debate = models.BooleanField(_('Debate module'))
    mod_proposals = models.BooleanField(_('Proposals module'))
    mod_news = models.BooleanField(_('News module'))
    mod_cal = models.BooleanField(_('Calendar module'))
    mod_docs = models.BooleanField(_('Documents module'))

---

form.errors

是否显示无错误

当涉及文件时，请检查

request.files

是否确实有文件

确保您的

具有

。。在许多情况下，这是罪魁祸首

谷歌对该错误的所有搜索结果都围绕着PIL。尤其是当你在mac电脑上的时候

---

Yuji可能回答了您的问题，但我想给出一个如何使视图更清晰的提示（同样的意思，代码少一点，可读性相同或更好）：

---

我不知道这是否会有帮助，但一旦我在检查用户权限时出错，就会提交表单，这就产生了一个窍门：

   if form.is_valid():
        new_space = form.save(commit = False)
        new_space.author = request.user
        ...
        new_space.save()

---

问题是模型字段author和date没有声明为blank=True，null=True。因为表单从未验证过，因为即使您没有提交save（），save命令也会验证表单。

是的，我将其声明为多部分表单，is_multipart（）返回True。我还没有试过form.errors（真丢脸！）是的，让我们看看表单是否有任何抱怨。它抱怨图像文件，说：“上传一个有效的图像。你上传的文件不是图像或者是损坏的图像。”但我检查了文件，它们工作得很好。还尝试了其他具有相同结果的图像。您最近是否将代码从一个位置移动到另一个位置？你用PIL吗？最近，当我不小心将PIL从OSX机器带到live production server时，我遇到了这个错误。PIL已正确安装，并且我尚未移动任何代码：）