上传特定文件表单 Django/Python

Question

我的 django 项目中只有一个上传文件表单（我使用的是 1.10）。实际上一切都很好，但是由于人们会将 csv 文件上传到服务器，我需要将我的逻辑限制为仅请求具有特定名称和格式的文件。

这是我的代码：

views.py

def list(request):
    # Handle file upload
    if request.method == 'POST':
        form = DocumentForm(request.POST, request.FILES)
        if form.is_valid():
            newdoc = Document(docfile = request.FILES['docfile'])
            newdoc.save()

            # Redirect to the document list after POST
            return HttpResponseRedirect(reverse('action'))
    else:
        messages.add_message(request, messages.ERROR,
                             'Something went wrong with files! Please contact the system administrator')
        return render(request, 'upaction-report.html')

    # Load documents for the list page

    # Render list page with the documents and the form
    return render(request, 'upaction-report.html', {'form': form})

forms.py

class DocumentForm(forms.Form):
    docfile = forms.FileField(
        label='File format should be under the following format:',
        help_text='- .csv format and under the name "Action_Report"',
    )

模板 html

<form action="{% url "list" %}" method="post" enctype="multipart/form-data">
    {% csrf_token %}
    <p>{{ form.non_field_errors }}</p>

    <p>{{ form.docfile.label_tag }}</p>
    <p> {{ form.docfile.help_text }}</p>


    <p>

        {{ form.docfile }}
    </p>

    <p><input type="submit" value="Upload File"/></p>
</form>

猜猜如何应用该限制？如果文件不正确，只需弹出一条消息，告诉重试，直到它具有正确的格式和名称。感谢您的宝贵时间，如果您需要更多详细信息，请告诉我。

Answer 1

您可以像这样在 DocumentForm clean 方法中验证文件名：

class DocumentForm(forms.Form):
    docfile = forms.FileField(
        label='File format should be under the following format:',
        help_text='- .csv format and under the name "Action_Report"',
    )

    def clean(self):
        docfile = self.cleaned_data.get('docfile')
        if not docfile:
            raise forms.ValidationError('file is required')  
        if not docfile.name.startswith('filename'):
            raise forms.ValidationError('incorrect file name')
        if not docfile.name.endswith('fileformat'):
            raise forms.ValidationError('incorrect file format')
        return super(DocumentForm, self).clean()