Check file input extension

[René L. Hechavarría]

Hi everyone, i need check file input format in forms.py, someone have any example. Thanks in advance.

My model form:

class TestModelForm(forms.ModelForm):
    class Meta:
        model = TestModel
        exclude = ('id')

        widgets = {
            'doc_1': forms.FileInput(attrs={'class': 'form-control custom-file-input'}), }

[Tim Graham]

You can use FileExtensionValidator:

https://docs.djangoproject.com/en/stable/ref/validators/#django.core.validators.FileExtensionValidator