Question

我在模型中的Admin-Page上有一个models.FileField，并希望在用户尝试上传现有文件时向用户显示错误。我已经尝试在FileSystemStorage上覆盖get_available_name（），但是如果我抛出ValidationError，它就不能很好地显示出来。

有没有办法（轻松）这样做？

Answer 1

为您的ModelAdmin提供自定义表单：

class FileModel(models.Model):
    name = models.CharField(max_length=100)
    filefield = models.FileField()  

class CustomAdminForm(forms.ModelForm):

     # Custom validation: clean_<fieldname>()
     def clean_filefield(self):        
         file = self.cleaned_data.get('filefield', None):
         if file:
                # Prepare the path where the file will be uploaded. Depends on your project.
                # In example:
                file_path = os.path.join( upload_directory, file.name )
                # Check if the file exists
                if os.path.isfile(file_path):
                    raise ValidationError("File already exists")

         return super(CustomAdminForm, self).clean_filefield()


# Set the ModelAdmin to use the custom form
class FileModelAdmin(admin.ModelAdmin):
    form = CustomAdminForm

Django Admin：在Storage中显示重复文件

1 个答案: