Update endpoint for user actions

courses/stats/serializers.py

@@ -122,6 +122,11 @@ class ActionSerializer(serializers.ModelSerializer):
             return ' a unidade {} na etapa {} do curso {}'.format(obj.title, obj.lesson, obj.lesson.course)
         return ''
 
+    def get_actor_name(self, actor):
+        if actor.name:
+            return actor.name.split()[0]
+        return actor.username
+
     def get_action_phrase(self, obj):
         verbs = {
             'access': 'acessou',
@@ -133,7 +138,7 @@ class ActionSerializer(serializers.ModelSerializer):
 
         action_phrase = ''
 
-        action_phrase += obj.actor.name.split()[0]
+        action_phrase += self.get_actor_name(obj.actor)
         action_phrase += (' {}'.format(verbs.get(obj.verb)))
 
         if obj.action_object:
@@ -181,4 +186,4 @@ class ActionSerializer(serializers.ModelSerializer):
                 course = 'do curso {}'.format(obj.action_object.lesson.course)
                 compl =  {'atividade': unit, 'etapa': step, 'curso': course}
                 return compl
-        return ''
\ No newline at end of file
+        return ''