如何在Django 2.0中用TemplateView和ModelForm上传文本文件

Hey there! Let's work through your file upload issue with Django 2.0 and TemplateView. I spotted a few key issues in your code that are keeping the upload from working correctly—let's fix them one by one.

1. Fix Form Handling in SummerizerView #

Your current view logic has two main problems: form initialization is incorrect for GET requests, and the POST method doesn't properly validate the submitted form. Here's the corrected views.py:

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.views.generic import TemplateView
from .forms import FileUploadForm

class HomePageView(TemplateView):
    template_name = 'Aamir/index.html'

class SummerizerView(TemplateView):
    template_name = 'Aamir/summrizer.html'

    def post(self, request, *args, **kwargs):
        # Initialize form with POST data and uploaded files
        form = FileUploadForm(request.POST, request.FILES)
        if form.is_valid():
            print('yes done')
            form.save()
            # Optional: Redirect to a success page or back to the form
            # return HttpResponseRedirect('/summerizer/')
        # Pass the (possibly invalid) form back to the template
        return self.render_to_response(self.get_context_data(form=form))

    def get_context_data(self, **kwargs):
        context = super(SummerizerView, self).get_context_data(**kwargs)
        # Use the passed form (for invalid POST) or create a new one for GET
        context["form"] = kwargs.get('form', FileUploadForm())
        return context

2. Correct the save Method in FileUploadForm #

Your form's save method has two critical errors: you're referencing the model instead of the form in super(), and you're trying to update a non-existent name field. Here's the fixed forms.py:

from django import forms
from .models import FileUpload

class FileUploadForm(forms.ModelForm):
    class Meta:
        model = FileUpload
        fields = ('upload_file',)
        widgets = {
            'upload_file': forms.FileInput(attrs={'class': 'form-control', 'accept': 'text/plain', 'id':'fupload', 'name':'fupload', 'placeholder': 'Browse Files' }, ),
        }
        error_messages = {
            'upload_file': {
                'required': "No file selected!",
            },
        }

    def save(self, commit=True):
        # Reference the form class in super(), not the model
        instance = super(FileUploadForm, self).save(commit=False)
        if commit:
            instance.save()  # No need for update_fields since we're saving the correct field
        return instance

3. Fix the File Upload Path in Your Model #

Your upload_to path is redundant with your MEDIA_ROOT setting, which will cause files to save to media/media/%Y/%m/%d/ instead of the intended media/%Y/%m/%d/. Update models.py:

from django.db import models

class FileUpload(models.Model):
    upload_file = models.FileField(upload_to='%Y/%m/%d/')

4. Add Media URL Configuration (Critical for Accessing Uploads) #

In your project's urls.py, add configuration to serve media files (only for DEBUG mode):

from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    path('', include('Aamir.urls')),
    path('admin/', admin.site.urls),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

Optional: Switch to FormView for Cleaner Code #

Django's FormView is designed specifically for form handling and will simplify your code. If you want to use it instead of TemplateView, rewrite SummerizerView like this:

from django.views.generic.edit import FormView
from .forms import FileUploadForm

class SummerizerView(FormView):
    template_name = 'Aamir/summrizer.html'
    form_class = FileUploadForm
    success_url = '/summerizer/'  # Redirect here after successful upload

    def form_valid(self, form):
        form.save()
        print('yes done')
        return super().form_valid(form)

Final Checks #

• Make sure the media folder exists in your project root and has read/write permissions
• Test with a plain text file (your form restricts uploads to text/plain)
• Check the form error messages on the page—your template already displays them, so you'll see why uploads fail if they do

内容的提问来源于stack exchange，提问作者user3626203