pedagogy: grade averages for UVs

pedagogy/models.py

@@ -51,6 +51,33 @@ class UV(models.Model):
         """
         return user.is_subscribed
 
+    def __grade_average_generic(self, field):
+        comments = self.comments.filter(**{field + "__gte": 0})
+        if not comments.exists():
+            return -1
+
+        return int(sum(comments.values_list(field, flat=True)) / comments.count())
+
+    @cached_property
+    def grade_global_average(self):
+        return self.__grade_average_generic("grade_global")
+
+    @cached_property
+    def grade_utility_average(self):
+        return self.__grade_average_generic("grade_utility")
+
+    @cached_property
+    def grade_interest_average(self):
+        return self.__grade_average_generic("grade_interest")
+
+    @cached_property
+    def grade_teaching_average(self):
+        return self.__grade_average_generic("grade_teaching")
+
+    @cached_property
+    def grade_work_load_average(self):
+        return self.__grade_average_generic("grade_work_load")
+
     def __str__(self):
         return self.code
 

pedagogy/templates/pedagogy/uv_detail.jinja

@@ -14,6 +14,12 @@
 	<p>{{ object.key_concepts|markdown }}</p>
 	<p>{% trans %}UV manager: {% endtrans %}{{ object.manager }}</p>
 
+	<p>{{ object.grade_global_average }}</p>
+	<p>{{ object.grade_utility_average }}</p>
+	<p>{{ object.grade_interest_average }}</p>
+	<p>{{ object.grade_teaching_average }}</p>
+	<p>{{ object.grade_work_load_average }}</p>
+
 	{% if object.comments.exists() %}
 		<h2>{% trans %}Comments{% endtrans %}</h2>
 		{% for comment in object.comments.all() %}