1👍
How about adding an extra field in the admin class?
In admins.py:
from myapp.models import MyModel
from django.contrib.admin import register, ModelAdmin
@register MyModel
class MyAdmin(ModelAdmin):
readonly_fields = ('image_preview',)
def image_preview(self, obj):
image_field = getattr(obj, 'image', '')
return format_html(u'<img src="{}" />', image_field.url)
Source:stackexchange.com