Add weightage for Quiz and Create Grading System App

App Name: grades

Grading System provides with the grade for a given value.
It contains different grade ranges.

Has its own default grading system.
Allows you to modify and add grading system wth grade ranges.

To be done:
- Need to add README
- Good UI
- There are fields like can_be_used and order in models for future use.
- More tests

App name: Yaksh

Now every quiz has a default weightage of 100%, can be changed.
An aggregate is calculated for a given course.
Using grades app a grade is provide to the aggregate value.

1 files changed, 36 insertions, 0 deletions

diff --git a/grades/migrations/default_grading_system.py b/grades/migrations/default_grading_system.py
new file mode 100644
index 0000000..1629d29
--- /dev/null
+++ b/grades/migrations/default_grading_system.py
@@ -0,0 +1,36 @@
+from django.db import migrations
+
+def create_default_system(apps, schema_editor):
+    GradingSystem = apps.get_model('grades', 'GradingSystem')
+    GradeRange = apps.get_model('grades', 'GradeRange')
+    db = schema_editor.connection.alias
+
+    default_system = GradingSystem.objects.using(db).create(name='default',
+                                                           can_be_used=True)
+    GradeRange.objects.using(db).create(system=default_system, order=1, lower_limit=0,
+                              upper_limit=40, grade='F', description='Fail')
+    GradeRange.objects.using(db).create(system=default_system, order=2, lower_limit=40,
+                              upper_limit=55, grade='P', description='Pass')
+    GradeRange.objects.using(db).create(system=default_system, order=3, lower_limit=55,
+                              upper_limit=60, grade='C', description='Average')
+    GradeRange.objects.using(db).create(system=default_system, order=4, lower_limit=60,
+                              upper_limit=75, grade='B', description='Satisfactory')
+    GradeRange.objects.using(db).create(system=default_system, order=5, lower_limit=75,
+                              upper_limit=90, grade='A', description='Good')
+    GradeRange.objects.using(db).create(system=default_system, order=6, lower_limit=90,
+                              upper_limit=101, grade='A+', description='Excellent')
+
+
+def delete_default_system(apps, schema_editor):
+    GradingSystem = apps.get_model('grades', 'GradingSystem')
+    GradeRange = apps.get_model('grades', 'GradeRange')
+    db = schema_editor.connection.alias
+
+    default_system = GradingSystem.objects.using(db).get(creator=None)
+    GradeRange.object.using(db).filter(system=default_system).delete()
+    default_system.delete()
+
+
+class Migration(migrations.Migration):
+    dependencies = [('grades', '0001_initial'),]
+    operations = [migrations.RunPython(create_default_system, delete_default_system),]