Can't hide a hidden field in the django admin

[Leandro Poblet]

I have a form in django 1.6.5 like this:

class ExampleForm(forms.ModelForm):

   id_image = forms.CharField(widget=forms.HiddenInput())
   image = forms.ImageField(widget=CustomImageUploader())

   # Tried this
    def __init__(self, *args, **kwargs):
        super(ExampleForm, self).__init__(*args, **kwargs)
        if self.instance and self.instance.pk:
            self.fields['id_image'].widget = forms.HiddenInput()

   class Meta:
      fields = ('id_image', 'image',)

And I couldn't find a way to hide the form in the django's admin. I can't exclude it because I have a custom form with a javascript function that fills the id_image field, so the only way I have to do this is by hiding the value, because it doesn't look nice for the end user.

[Tim Graham]

Have you tried ​ModelAdmin.form?

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