Django : customizing FileField value while editing a model

Question

I\'ve got a model, with FileField. When I edit this model in a view, I want to change the \"current\" value of FileField which gets displayed in the vi

Answer 1

If you want an easier way and avoid to rewrite the render logic of the widget, you can do a little hack.

from os import path
from django import forms


class FormatString(str):

    def format(self, *args, **kwargs):
        arguments = list(args)
        arguments[1] = path.basename(arguments[1])
        return super(FormatString, self).format(*arguments, **kwargs)


 class ClearableFileInput(forms.ClearableFileInput):

     url_markup_template = FormatString('{1}')

And then manually set the widget for the field.

class DemoVar_addform(ModelForm):

    class Meta:
        model = DemoVar_model
        widgets = {
            'Welcome_sound': ClearableFileInput,
        }