Django - 图像未从表单中保存

问题描述

我在设置此 Django Web 应用程序时遇到错误。每当我点击提交按钮时，我都会收到 505 错误消息。图像应该保存在根目录中，但我似乎无法弄清楚问题。

以下是网络应用程序的代码

urls.py:

from django.contrib import admin
from django.urls import path
from django.conf.urls import url
from CancerClassifier import views
from django.conf.urls.static import static
from django.conf import settings

urlpatterns = [
    path('admin/',admin.site.urls),url('^$',views.index,name = 'homepage'),url('predictimage',views.predictimage,name='predictimage'),]

urlpatterns += static(settings.MEDIA_URL,document_root = settings.MEDIA_ROOT)

views.py：

from django.shortcuts import render

from django.core.files.storage import FileSystemStorage

def index(request):
    context = {'a' : 1}
    return render(request,'index.html',context)

def predictimage(request):
    print(request)
    print(request.POST.dict())
    fileObj = request.FILES['filePath']
    fs = FileSystemStorage()
    fs.save(fileObj.name,fileObj)

    context = {'a' : 1}
    return render(request,context)

index.html：

<!DOCTYPE html>
<html lang="en" dir="ltr">
    <head>
        <Meta charset="utf-8">
        <title>Skin Lesion Classifier</title>
    </head>
    <body>
        
        <h1>Upload new File</h1>

        <form class="imageUpload" action="predictimage" method="post">
            {% csrf_token %}
            <input type="file" name="filePath">
            <input type="submit" value="Submit">
            <br>
            <h3>Prediction: {{prediction}}</h3>
        </form>
    </body>
</html>

这是我在终端收到的错误信息：

[16/Jan/2021 17:13:14] "GET / HTTP/1.1" 200 493
<WsgiRequest: POST '/predictimage'>
{'csrfmiddlewaretoken': 'UPYALDxVQ8SJR8DDy55h14PnaaWElXBwcYnlms6hhpV9qgbtdy1hW6UnU1Y8TVpk','filePath': 'image-asset.jpeg'}
Internal Server Error: /predictimage
Traceback (most recent call last):
  File "/Users/sparshbohra/opt/anaconda3/lib/python3.7/site-packages/django/utils/datastructures.py",line 76,in __getitem__
    list_ = super().__getitem__(key)
KeyError: 'filePath'

During handling of the above exception,another exception occurred:

Traceback (most recent call last):
  File "/Users/sparshbohra/opt/anaconda3/lib/python3.7/site-packages/django/core/handlers/exception.py",line 47,in inner
    response = get_response(request)
  File "/Users/sparshbohra/opt/anaconda3/lib/python3.7/site-packages/django/core/handlers/base.py",line 181,in _get_response
    response = wrapped_callback(request,*callback_args,**callback_kwargs)
  File "/Users/sparshbohra/cancer-scanner/CancerProj/CancerClassifier/views.py",line 12,in predictimage
    fileObj = request.FILES['filePath']
  File "/Users/sparshbohra/opt/anaconda3/lib/python3.7/site-packages/django/utils/datastructures.py",line 78,in __getitem__
    raise MultiValueDictKeyError(key)
django.utils.datastructures.MultiValueDictKeyError: 'filePath'
[16/Jan/2021 17:13:19] "POST /predictimage HTTP/1.1" 500 67980

解决方法

原来我只是缺少 HTML 表单中的 enctype。

刚刚添加 enctype="multipart/form-data" 在表单标签中

django django django-file-upload python web-applications