How to check ImageField is empty

Question

I have an ImageField in my model and when I'm saving it I want to check that if it's None or not.

In django shell I'm calling my object's ImageField and it gives :

>>> p.avatar
<ImageFieldFile: None>
>>> p.avatar is None
False

I found that the ImageField's name is u'', so is there any better way to do it ?

score 87 · Accepted Answer · answered Mar 06 '11 at 20:16

87

I found that the ImageField's name is u'', so is there any better way to do it ?

Actually, it looks like that's exactly how this class evaluates bool(), so the better way is to just test its bool() by calling if p.avatar

ImageFieldFile subclasses File, which defines:

def __nonzero__(self):
    return bool(self.name)

So the better way is indeed:

if not p.avatar:
   print "I don't exist"

bool(p.avatar) is False

answered Mar 06 '11 at 20:16

On template, you should test {% p.avatar != '' %}. Ugly but it works... – Josir Jan 31 '19 at 11:57
4

not necessary, you can test simply with `{% if p.avatar %}` ... `{% endif %}` – shuckc Jun 15 '20 at 11:01

1 Answers1