Question

我正在尝试允许用户上传图片。首次创建用户时，会为他们提供唯一的ID /主键。当用户上传图像时，我想将该图像保存在文件夹中，具体取决于用户的唯一ID。例如，如果用户唯一ID为1，我想将其保存在

中

1/uploadedPhotos/imageName

这是我的模特：

def get_file_path(instance, filename):
    return os.path.join('%s/uploadedPhotos' % instance.user_id, filename)

class UserImages(models.Model):
    user = models.ForeignKey(User)
    photo = models.ImageField(upload_to=get_file_path)

这是我的表格：

class UploadImageForm(forms.ModelForm):
    class Meta:
        model = UserImages
        fields = ['photo']

这是我的观点：

def uploadImageView(request):
    if request.method == 'POST':
        form = UploadImageForm(request.POST, request.FILES)
        if form.is_valid():
            # file is saved
            form.save()
            return redirect('/')
    else:
        form = UploadImageForm()

    return render(request, 'uploadImagePage.html', {'uploadImageForm': form})

调用uploadImageView视图的URL是/ uploadImage /。当我转到该URL并使用uploadImageForm上传图像时，它会出错：

IntegrityError at /uploadImage/

null value in column "user_id" violates not-null constraint
DETAIL:  Failing row contains (1, null, None/uploadedPhotos/imageName.png).

并且追溯返回

form.save()

在我的uploadImageView中排队。我做错了什么导致这个错误？

Answer 1

您的UserImages模型需要user，但您的表单UploadImageForm仅询问photo。你需要设置user，尝试这样的事情：

def uploadImageView(request):
    if request.method == 'POST':
        form = UploadImageForm(request.POST, request.FILES)
        if form.is_valid():
            # file is saved
            instance = form.save(commit=False)
            instance.user = request.user
            instance.save()
            return redirect('/')
    else:
        form = UploadImageForm()

    return render(request, 'uploadImagePage.html', {'uploadImageForm': form})

Answer 2

obj = form.save(commit=False)
obj.user = request.user
obj.save()

Answer 3

您必须从request.user中提取用户并将其添加到表单数据中。

Django - 将图像上传到数据库会引发IntegrityError

3 个答案: