Question

forms.py：

class TestPicForm(forms.ModelForm):
    x = forms.FloatField(widget=forms.HiddenInput())

    class Meta:
        from .models import TestPic
        model = TestPic
        fields = ('file', 'file_50', 'x', )

    def save(self):
        user_photo = super(TestPicForm, self).save()
        x = self.cleaned_data.get('x')

        image = Image.open(user_photo.file)
        # image_50 = Image.open(user_photo.file_50)
        cropped_image = image.crop((x, 2x, x + 10, y + 10)).resize((300, 300), Image.ANTIALIAS)
        cropped_50_image = image.crop((x, 2x, x + 50, y + 50)).resize((10, 150), Image.ANTIALIAS)
        cropped_image.save(user_photo.file.path)
        cropped_50_image.save(user_photo.file_50.path)

        return user_photo

我之前问过抽象问题，但是现在我可以更具体地提出一个问题。

在此代码上，我仅上传一个文件，但将其保存到多个字段中。（在这种情况下，为file，file_50）

models.py：

class TestPic(models.Model):

    file = models.ImageField(null=True, blank=True, default=None)
    file_50 = models.ImageField(null=True, blank=True, default=None)

jquery-ajax.html：

<form method="post" enctype="multipart/form-data" id="form_upload">
<input type="file" name="file" required id="input_file"></form>
<script>
    $("#upload_btn").click(function () {
            var x = 1
            var form_file = _form_upload.find('#form_upload')[0];
            var form_data = new FormData(form_file);
            form_data.append('x', x);

            $.ajax({
                url:'/ajax/',
                type:'post',
                dataType:'json',
                cache:false,
                processData: false,
                contentType: false,
                data:form_data,
                success:function (data) {
                }
            });
          });
</script>

views.py：

if request.is_ajax():
    testpic = TestPic.objects.get(pk=1)

    form = TestPicForm(request.POST, request.FILES, instance=testpic)
    if form.is_valid():
        form.save()

        return JsonResponse({'success': 'file_uploaded'})

    return JsonResponse({'success': 'file_uploaded with: ' + 'failed form_valid'})

返回The 'file_50' attribute has no file associated with it.

我认为在forms.py中，cropped_50_image.save(user_photo.file_50.path)是个问题。

如何解决这个问题？

Django，一个文件，但字段是多个，如何保存？

0 个答案: