|
import logging
from django.db import models
from backend_app.models.abstract.base import BaseModel
from backend_app.models.exchange import Exchange
logger = logging.getLogger("django")
class Course(BaseModel):
# Not using utc_id as Primary Key here for our model to be more resilient
utc_id = models.IntegerField(null=False, unique=True)
utc_exchange_id = models.IntegerField(null=False)
code = models.CharField(max_length=10, null=True, blank=True)
title = models.CharField(default="", null=False, blank=True, max_length=200)
link = models.URLField(null=True, blank=True, max_length=500)
ects = models.DecimalField(default=0, null=True, decimal_places=2, max_digits=7)
category = models.CharField(null=True, blank=True, max_length=5)
profile = models.CharField(null=True, blank=True, max_length=10)
tsh_profile = models.CharField(null=True, blank=True, max_length=21)
student_login = models.CharField(null=True, blank=True, max_length=8)
# Field to tell that for some reason there is no corresponding exchange in the UTC DB
unlinked = models.BooleanField(default=False, null=False)
# a bit of denormalization
exchange = models.ForeignKey(
Exchange, on_delete=models.CASCADE, related_name="exchange_courses", null=True
)
def save(self, *args, **kwargs):
"""
Custom handling of denormalization
"""
try:
exchange = Exchange.objects.get(utc_id=self.utc_exchange_id)
self.exchange = exchange
except Exchange.DoesNotExist:
logger.error(
"Trying to find exchange {} "
"when updating course {} but it doesn't exist".format(
self.utc_exchange_id, self.utc_id
)
)
super().save(*args, **kwargs)
|
