Django形式:“此字段为必填"当文件发布到文件字段时 [英] Django forms: "This field is required" when file POSTed to file field

问题描述

由于某种原因，我无法将文件放入ModelForm中的文件字段中.文件已提交，文件名在相应的POST请求中，但是form.is_valid()失败，因为它指出{'the_file': [u'This field is required.']}

I for some reason am unable to get a file to into my filefield in my ModelForm. The file is submitted and the file name is in the corresponding POST request, however the form.is_valid() fails as it states {'the_file': [u'This field is required.']}

我为一个模型编写了一个ModelForm，其中有一个文件字段，并且有另一个模型的外键，因此:

I have written a ModelForm for a model with a file field in and a foreign key to another model, thus:

class AccountFile(models.Model):
the_file = models.FileField(upload_to='{}/%Y/%m/%d/'.format(
    settings.MEDIA_ROOT,
))
account = models.ForeignKey(
    Account,
    blank=True,
    null=True,
    related_name='account_files'

然后我生成了一个表格来上传文件，因此:

I've then generated a form to upload a file, thus:

class UploadFileForm(forms.ModelForm):
class Meta:
    model = models.AccountFile
    fields = ['the_file' ]


def clean_file(self):
    file = self.cleaned_data.get("the_file", False)
    filetype = magic.from_buffer(file.read())
    if not "pdf" in filetype:
        raise forms.ValidationError("File is not pdf.")
    return file

在我可以使至少一件事起作用时，进行一些非常基本的验证(将进行扩展！).

Putting in some very basic validation (which will be extended!) when I can get at least one thing to work.

表单是这样处理的:

if request.method == 'POST':
    form = forms.UploadFileForm(request.POST, request.FILES)
    if form.is_valid():
        handle_uploaded_file(request.FILES['file'])
        return redirect(
            'account_url',
            acc_manager_pk=acc_manager.pk,
            account_pk=account.pk,
            )
else:
    form = forms.UploadFileForm()

这是在Django 1.7上

This is on Django 1.7

推荐答案

确保您的表单具有enctype设置，例如:

Make sure that your form has the enctype set, e.g.:

<form method="post" enctype="multipart/form-data">

来自文档 :

请注意， request.FILES 仅在请求方法为 POST 并且发布请求的<form>具有属性 enctype ="multipart/form-data" .否则， request.FILES 将为空.

Note that request.FILES will only contain data if the request method was POST and the <form> that posted the request has the attribute enctype="multipart/form-data". Otherwise, request.FILES will be empty.

这篇关于Django形式:“此字段为必填"当文件发布到文件字段时的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！