improve exam collections

generic/forms.py

@@ -771,6 +771,11 @@ class ExamCollectionForm(ModelForm):
                 widget=FilteredSelectMultiple(verbose_name=name, is_stacked=False),
             )
 
+        self.fields["author"] = ModelMultipleChoiceField(
+            queryset=User.objects.all(),
+            widget=FilteredSelectMultiple(verbose_name="Authors", is_stacked=False), required=False,
+        )
+
     def save(self, commit=True):
         # Get the unsaved Long instance
         instance = ModelForm.save(self, False)

generic/templates/generic/examcollection_detail.html

@@ -10,7 +10,9 @@
         <a href="{% url 'generic:examcollection_delete' object.pk %}">Delete</a>
     </p>
 
-    This collection contains the following exams
+    <div>Authors: {{ object.get_authors }}</div>
+
+    <p>This collection contains the following exams<p>