updating question stats on eval

ARFA/ARFA_app/migrations/0004_auto_20181125_1807.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.16 on 2018-11-25 18:07
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ARFA_app', '0003_auto_20181125_1102'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='question',
+            name='num_appeared',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AddField(
+            model_name='question',
+            name='num_correct',
+            field=models.IntegerField(default=0),
+        ),
+        migrations.AlterField(
+            model_name='test',
+            name='max_marks',
+            field=models.IntegerField(null=True),
+        ),
+    ]

ARFA/ARFA_app/models.py

@@ -86,8 +86,8 @@ class Question(models.Model):
 	difficulty_observed = models.CharField(max_length=20)
 	question_text = models.CharField(max_length=1000)
 	image_link = models.CharField(max_length=200) 
-	num_appeared = models.IntegerField
-	num_correct = models.IntegerField
+	num_appeared = models.IntegerField(default=0)	
+	num_correct = models.IntegerField(default=0)
 	visibility = models.CharField(max_length=20)
 	ownership = models.CharField(max_length=20)
 

ARFA/ARFA_app/utilities.py

@@ -17,6 +17,7 @@ from django.views.decorators.cache import cache_control
 import json
 from django.db import connection
 from django.db import IntegrityError
+from django.db.models import F
 from pprint import pprint
 import datetime
 
@@ -48,6 +49,7 @@ def evaluate(responses, otherData):
         marksDict[c.q_ID_id] = [c.marks_pos, c.marks_neg]
 
     totalMarks = 0
+    correctQList = [] #list of correctly attempted questions
     correctAnswer = None
     for response in responses:
         evalObj = Evaluation()
@@ -68,17 +70,12 @@ def evaluate(responses, otherData):
         #     evalObj.marks = 1
 
         responseList = options
-        # print "correctanswer"
-        # print correctAnswer
-        # print correctAnswer.values('pk')
-        # correctAnswer = list(correctAnswer.values('pk'))
-        # correctAnswer = list(map(lambda x: x['pk'], correctAnswer))
         print correctAnswer
-
-        #correct answer
+        
         if len(responseList) == len(correctAnswer) and sorted(responseList) == sorted(correctAnswer):
             evalObj.marks = marksDict[question][0] #0 - first in the list, marks_pos
             totalMarks = totalMarks + evalObj.marks
+            correctQList.append(question) #add to list of correctly attempted questions
         #else, it is a wrong answer since no attempt results in no response
         else:
             evalObj.marks = marksDict[question][1] #1 - second in the list, marks_neg
@@ -90,6 +87,14 @@ def evaluate(responses, otherData):
             print "Integrity error - evaluation not recorded"
             pass
 
+    #update questions' data
+    #https://docs.djangoproject.com/en/2.1/topics/db/queries/#updating-multiple-objects-at-once
+    models.Question.objects.filter(q_ID__in=QList).update(
+        num_appeared = F('num_appeared')+1)
+    models.Question.objects.filter(q_ID__in=correctQList).update(
+        num_correct = F('num_correct')+1)
+
+    #write takesObj
     takesObj = Takes()
     takesObj.student_id = otherData['username']
     takesObj.test_ID_id = otherData['testID']