add basic (user) history for collections

generic/models.py

@@ -531,7 +531,7 @@ class SeriesBase(models.Model):
         size = 0
 
         for i in images:
-            size += i.image.size
+            size += i.get_file_size()
 
         return size
 
@@ -997,7 +997,6 @@ class ExamBase(ExamOrCollectionGenericBase):
 
         return User.objects.filter(pk__in=user_ids)
 
-
     def generate_user_report(self, user):
         exam_text = [f"Candidate {user.first_name} [{user.email}]"]
 
@@ -1478,6 +1477,12 @@ class CidUserExam(models.Model):
 
         return f"{self.exam} / {user}: {start_time} {end_time}"
 
+    def get_user_name(self) -> str:
+        if self.cid_user is None:
+            return self.user_user.username
+        else:
+            return "CID" + str(self.cid_user.cid)
+
 
 CID_GROUP_EXAMS = (
     ("SBAs", "sba_cid_user_groups"),
@@ -1504,7 +1509,6 @@ class BaseUserGroup(models.Model):
 
 
 class CidUserGroup(BaseUserGroup):
-
     def __str__(self) -> str:
         return str(self.name)