Django: Validate file type of uploaded file

Question

I have an app that lets people upload files, represented as UploadedFiles. However, I want to make sure that users only upload xml files. I know I can do this u

Answer 1

From django 1.11, you can also use FileExtensionValidator.

from django.core.validators import FileExtensionValidator
class UploadedFile(models.Model):
    file = models.FileField(upload_to=settings.XML_ROOT, 
        validators=[FileExtensionValidator(allowed_extensions=['xml'])])

Note this must be used on a FileField and won't work on a CharField (for example), since the validator validates on value.name.

ref: https://docs.djangoproject.com/en/dev/ref/validators/#fileextensionvalidator