ISSUE-8: format m2m confirmation values (#15)

* feat(ISSUE-8): Formatting m2m confirmation values as html lists

* feat(ISSUE-8): Remove comments

Co-authored-by: Thu Trang Pham <thu@joinmodernhealth.com>

admin_confirm/admin.py

@@ -130,7 +130,7 @@ class AdminConfirmMixin:
                     field_object = model._meta.get_field(name)
                     initial_value = getattr(obj, name)
                     if isinstance(field_object, ManyToManyField):
-                        initial_value = field_object.value_to_string(obj)
+                        initial_value = field_object.value_from_object(obj)
 
                     if initial_value != new_value:
                         changed_data[name] = [initial_value, new_value]

admin_confirm/templatetags/formatting.py

@@ -1,12 +1,20 @@
 from django import template
 from django.db.models.query import QuerySet
+from django.utils.html import escape
+from django.utils.safestring import mark_safe
 
 register = template.Library()
 
 
 @register.filter
 def format_change_data_field_value(field_value):
-    if isinstance(field_value, QuerySet):
-        return list(field_value)
-
-    return field_value
+    if isinstance(field_value, str):
+        return field_value
+    try:
+        output = "<ul>"
+        for value in iter(field_value):
+            output += "<li>" + escape(value) + "</li>"
+        output += "</ul>"
+        return mark_safe(output)
+    except:
+        return field_value