fixup! add tags when creating or updating forum

lacommunaute/forum/forms.py

@@ -2,6 +2,7 @@
 
 from django import forms
 from django.conf import settings
+from django.core.exceptions import ObjectDoesNotExist
 from django.forms import CharField, CheckboxSelectMultiple, ModelMultipleChoiceField
 from taggit.models import Tag
 
@@ -45,7 +46,11 @@ class ForumForm(forms.ModelForm):
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
-        self.fields["tags"].initial = self.instance.tags.all()
+        try:
+            if hasattr(self.instance, "topic"):
+                self.fields["tags"].initial = self.instance.tags.all()
+        except ObjectDoesNotExist:
+            pass
 
     def save(self, commit=True):
         forum = super().save(commit=False)