我试图在Django项目中实现一个图像上传功能，但没有创建任何文件.我的代码出了什么问题

Question

我有一个配置文件页面，旁边有一个默认的配置文件图片和一个"更改"按钮，点击后会触发模式。在此模式中，图像上传按钮(用于选择图像(将与提交按钮一起出现。我已经创建了一个单独的视图来处理图像上传。我不知道为什么上传后没有创建文件。Django没有给出任何错误消息。我怀疑这与settings.py配置或我的模态字段的动作部分有关。

views.py

from django.shortcuts import render, redirect
from django.http import HttpResponse, HttpResponseRedirect
from .forms import KeyForm, Weekly_Item_Form, Daily_Item_Form, ProfileForm
from .models import Key, Weekly_Item, Daily_Item, Profile

def profile_view(request):
profiles = Profile.objects.all()
mainprofile = profiles.last()
if profiles:
form = ProfileForm()
context = {
'page_title':"Profile", 
'mainprofile':mainprofile,
'form': form
}
else:
context = {'page_title':"Profile"}
return render(request, "bujo/profile.html", context)

def update_image(request, pk):
mainprofile = Profile.objects.get(id=pk)
form = ProfileForm(instance=mainprofile)

if request.method == 'POST':
form = ProfileForm(request.POST, request.FILES, instance=mainprofile)
if form.is_valid():
form.save()
return redirect('profile')
return redirect('profile')

urls.py

urlpatterns = [
path('admin/', admin.site.urls),
path('profile/', app_views.profile_view, name='profile'),
path('update_image/<str:pk>', app_views.update_image, name='update_image'),
] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)

设置.py

STATIC_URL = '/static/'
STATICFILES_DIRS = [
os.path.join(BASE_DIR, 'static'),
]
MEDIA_URL = '/media/'
MEDIA_ROOT = os.path.join(BASE_DIR, 'media')

profile.html

<form method='POST' enctype="multipart/form-data" action="{% url 'update_image' mainprofile.pk %}"> {% csrf_token %}
{{ form.image }}
<input type='submit' class="btn btn-primary"" value='Change profile picture' />
</form>

forms.py

from django import forms
from .models import Profile
class ProfileForm(forms.ModelForm):
class Meta:
model = Profile
fields = ['name', 'image', 'nickname', 'bio']

型号.py

class Profile(models.Model):
name = models.CharField(max_length=50, blank=False)
image = models.ImageField(null=True, blank=True, upload_to="images/")
nickname = models.CharField(max_length=20, null=False, blank=True)
bio = models.CharField(max_length=100, null=False, blank=True)

Answer 1

您的表单也有图像以外的字段。您没有在模板中呈现它们，但表单类需要它们，因此当提交表单时，它被认为是无效的。如果只想更新图像，请创建另一个只有图像字段的表单类。

在forms.py中添加另一个表单类：

from django import forms
from .models import Profile
class ProfileImageForm(forms.ModelForm):
class Meta:
model = Profile
fields = ['image']

在您看来：

from django.shortcuts import render, redirect
from django.http import HttpResponse, HttpResponseRedirect
from .forms import KeyForm, Weekly_Item_Form, Daily_Item_Form, ProfileForm, ProfileImageForm
from .models import Key, Weekly_Item, Daily_Item, Profile

def profile_view(request):
profiles = Profile.objects.all()
mainprofile = profiles.last() # This line feels weird! You always make the form for the last profile only.
if profiles:
form = ProfileImageForm()
context = {
'page_title':"Profile", 
'mainprofile':mainprofile,
'form': form
}
else:
context = {'page_title':"Profile"}
return render(request, "bujo/profile.html", context)

def update_image(request, pk):
mainprofile = Profile.objects.get(id=pk)
form = ProfileImageForm(instance=mainprofile)

if request.method == 'POST':
form = ProfileImageForm(request.POST, request.FILES, instance=mainprofile)
if form.is_valid():
form.save()
return redirect('profile')
return redirect('profile')