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Here’s a class that subclasses the ImageField and allows you to set a limit on filesize while still allowing empty entries.
class ImageField50KB(forms.ImageField): def __init__(self, *args, **kwargs): super(ImageField50KB, self).__init__(*args, **kwargs) self.label = (u'Passport (Max 50kB)') self.helptext = (u'Attach a current passport photograph') def clean(self, data, initial): if not data and initial: return initial f = super(ImageField50KB, self).clean(data) if not (f.size <= 50000): raise forms.ValidationError((u'Image is too large, Maximum filesize allowed is 50kB' )) return f
To use this in your form, copy the code into forms.py and add the following to the form definition:
image= ImageField50KB( widget=forms.FileInput, initial=BLANK_IMAGE, )
where BLANK_IMAGE has been declared already to point to a file that will be used as default image in case the field is empty.