This snippit is meant to be used with the pre_delete signal to delete any files associated with a model instance before the instance is deleted. It will search the model instance for fields that are subclasses of FieldFile, and then delete the corresponding files. As such, it will work with any model field that is a subclass of FileField.
Example: admin.site.register(YourCoolModel, CustomModelAdmin)
This adds a checkbox in the admin site that removes the reference to a file uploaded via a FileField (or ImageField). It does not delete the actual file.
Example model: class MyModel(models.Model): file = RemovableFileField(upload_to='files', \ null=True, blank=True) image = RemovableImageField(upload_to='images', \ null=True, blank=True) A delete checkbox will be automatically rendered when using ModelForm or editing it using form_for_instance. Also, the filename or the image will be displayed below the form field. You can edit the render method of the DeleteCheckboxWidget or add one to RemovableFileFormWidget to customize the rendering. UPDATE: 5. April 2009. Making it work with latest Django (thanks for the comments).
Example model: class MyModel(models.Model): file = RemovableFileField(upload_to='files', \ null=True, blank=True) image = RemovableImageField(upload_to='images', \ null=True, blank=True) A delete checkbox will be automatically rendered when editing such a model using form_for_instance. [UPDATED version which works with ModelForms](http://www.djangosnippets.org/snippets/636/)
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