Simplify serialization for LearningObjects

courses/stats/serializers.py

@@ -14,6 +14,8 @@ from courses.classroom.serializers import BasicClassroomSerializer
 
 from discussion.models import Comment, Topic, Forum
 
+from courses_learning_objects.models import LearningObject, Answer
+
 from datetime import datetime
 
 class UserActionsSerializer(serializers.Serializer):
@@ -39,7 +41,7 @@ class GenericRelatedField(serializers.Field):
 
 class ActionSerializer(serializers.ModelSerializer):
     actor = GenericRelatedField(read_only=True)
-    target = GenericRelatedField(read_only=True)
+    target = serializers.SerializerMethodField()
     action_object = GenericRelatedField(read_only=True)
     verb = GenericRelatedField(read_only=True)
     action_phrase = serializers.SerializerMethodField()
@@ -49,6 +51,14 @@ class ActionSerializer(serializers.ModelSerializer):
         model = Action
         fields = ('actor', 'target', 'action_object', 'verb', 'action_phrase', 'timestamp')
 
+    def get_target(self, obj):
+        if isinstance(obj.target, LearningObject):
+            return obj.target.unit.lesson.course.name
+        if isinstance(obj.target, Forum):
+            print(obj.target)
+            return obj.target.title
+        return obj.target
+
     def get_timestamp(self, obj):
         timestamp_str = obj.timestamp.strftime('%d-%m-%Y %H:%M:%S')
         date, hour = timestamp_str.split()
@@ -78,6 +88,13 @@ class ActionSerializer(serializers.ModelSerializer):
             return ' no fórum ' + obj.title
         if isinstance(obj, AccessibleArea):
             return ' na área ' + self.get_accesible_area_name(obj.name)
+        if isinstance(obj, Answer):
+            return ' respondeu'
+        if isinstance(obj, LearningObject):
+            unit = obj.unit.title
+            step = obj.unit.lesson.name
+            course = obj.unit.lesson.course.name
+            return ' a atividade {} na etapa {} do curso {}'.format(unit, step, course)
         return ''
 
     def get_action_phrase(self, obj):