Change default grading system behaviour

Cannot edit default system.
Code as per PEP8 standards.
Updates grade after regrade or manual grading
Field change from total marks to percentage
Removed unused fields from grades app

1 files changed, 21 insertions, 16 deletions

diff --git a/grades/migrations/default_grading_system.py b/grades/migrations/default_grading_system.py
index 1629d29..85390d6 100644
--- a/grades/migrations/default_grading_system.py
+++ b/grades/migrations/default_grading_system.py
@@ -1,24 +1,28 @@
 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')
+    default_system = GradingSystem.objects.using(db).create(name='default')
+
+    graderanges_objects = [
+        GradeRange(system=default_system, lower_limit=0, upper_limit=40,
+                   grade='F', description='Fail'),
+        GradeRange(system=default_system, lower_limit=40, upper_limit=55,
+                   grade='P', description='Pass'),
+        GradeRange(system=default_system, lower_limit=55, upper_limit=60,
+                   grade='C', description='Average'),
+        GradeRange(system=default_system, lower_limit=60, upper_limit=75,
+                   grade='B', description='Satisfactory'),
+        GradeRange(system=default_system, lower_limit=75, upper_limit=90,
+                   grade='A', description='Good'),
+        GradeRange(system=default_system, lower_limit=90, upper_limit=101,
+                   grade='A+', description='Excellent')
+    ]
+    GradeRange.objects.using(db).bulk_create(graderanges_objects)
 
 
 def delete_default_system(apps, schema_editor):
@@ -32,5 +36,6 @@ def delete_default_system(apps, schema_editor):
 
 
 class Migration(migrations.Migration):
-    dependencies = [('grades', '0001_initial'),]
-    operations = [migrations.RunPython(create_default_system, delete_default_system),]
+    dependencies = [('grades', '0001_initial'), ]
+    operations = [migrations.RunPython(create_default_system,
+                  delete_default_system), ]