populate.py

import os
os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'courses.settings')

from gpaconvert.models import GradeSource, DiscreteRule, ContinuousRule


GradeSource.objects.all().delete()

DISCRETE_GRADES = (
    ('Super Sully', 'A'),
    ('Mediocre Mike', 'C'),
)
CONTINUOUS_GRADES = (
    (100.0, 'A+'),
    (50.0, 'C'),
    (0.0, 'F'),
)

monsters_uni = GradeSource.objects.create(country='CA',
                                          institution='Monsters University',
                                          status='ACTI')
for source, target in DISCRETE_GRADES:
    monsters_uni.discrete_rules.add(DiscreteRule(lookup_value=source,
                                                 transfer_value=target))
monsters_uni.save()

balls_uni = GradeSource.objects.create(country='US',
                                       institution='Ball State University',
                                       status='ACTI')
for source, target in CONTINUOUS_GRADES:
    balls_uni.continuous_rules.add(ContinuousRule(lookup_lbound=source,
                                                  transfer_value=target))
balls_uni.save()