Merge pull request #438 from prathamesh920/Grades

Grades

3 files changed, 84 insertions, 0 deletions

diff --git a/grades/migrations/0001_initial.py b/grades/migrations/0001_initial.py
new file mode 100644
index 0000000..04a3006
--- /dev/null
+++ b/grades/migrations/0001_initial.py
@@ -0,0 +1,43 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.5 on 2018-02-12 11:12
+from __future__ import unicode_literals
+
+from django.conf import settings
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    initial = True
+
+    dependencies = [
+        migrations.swappable_dependency(settings.AUTH_USER_MODEL),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='GradeRange',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('lower_limit', models.FloatField()),
+                ('upper_limit', models.FloatField()),
+                ('grade', models.CharField(max_length=10)),
+                ('description', models.CharField(blank=True, max_length=127, null=True)),
+            ],
+        ),
+        migrations.CreateModel(
+            name='GradingSystem',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(max_length=255, unique=True)),
+                ('description', models.TextField(default='About the grading system!')),
+                ('creator', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to=settings.AUTH_USER_MODEL)),
+            ],
+        ),
+        migrations.AddField(
+            model_name='graderange',
+            name='system',
+            field=models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, to='grades.GradingSystem'),
+        ),
+    ]
diff --git a/grades/migrations/__init__.py b/grades/migrations/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/grades/migrations/__init__.py
diff --git a/grades/migrations/default_grading_system.py b/grades/migrations/default_grading_system.py
new file mode 100644
index 0000000..85390d6
--- /dev/null
+++ b/grades/migrations/default_grading_system.py
@@ -0,0 +1,41 @@
+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')
+
+    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):
+    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), ]