失败- Django中没有文件下载上传的文件

from django.http import HttpResponse

def download_file(request):
    file_path = '/path/to/file'  # 文件的绝对路径
    with open(file_path, 'rb') as file:
        response = HttpResponse(file.read(), content_type='application/octet-stream')
        response['Content-Disposition'] = 'attachment; filename="file_name"'  # 设置下载时的文件名
        return response

# models.py
from django.db import models

class MyModel(models.Model):
    file = models.FileField(upload_to='uploads/')

# forms.py
from django import forms

class MyForm(forms.Form):
    file = forms.FileField()

# views.py
from django.shortcuts import render, redirect
from .forms import MyForm

def upload_file(request):
    if request.method == 'POST':
        form = MyForm(request.POST, request.FILES)
        if form.is_valid():
            file = form.cleaned_data['file']
            # 处理上传的文件，例如保存到服务器或进行其他操作
            return redirect('success')  # 上传成功后重定向到成功页面
    else:
        form = MyForm()
    return render(request, 'upload.html', {'form': form})