def add_photo_to_categorie(modeladmin, request, queryset):
count = 0
for photo in queryset:
if not Photo.objects.filter(image=photo,categorie=categorie).exists():
Photo(image=photo,categorie=categorie).save()
count +=1
if count==1:
message_bit = "1 photo was"
else:
message_bit = "{} photos were".format(count)
modeladmin.message_user(
request,
"{} added to Categorie {}".format(message_bit,categorie)
)
