from django.db import models
from django.conf import settings


class GroupCourse(models.Model):

    group = models.ForeignKey('auth.Group', on_delete=models.DO_NOTHING)
    course = models.ForeignKey('university.Course', on_delete=models.DO_NOTHING)
    created_at = models.DateTimeField(auto_now_add=True)
    created_by = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.DO_NOTHING)

    class Meta:
        db_table = 'group_courses'
        unique_together = ('group', 'course')