from django.db import models
from django.utils.translation import gettext_lazy as _


class Chapter(models.Model):

    sequence = models.SmallIntegerField(
        default=0,
        help_text=_('will be orderd by sequence number')
    )
    title = models.CharField(max_length=128)
    description = models.TextField()
    slug = models.SlugField(blank=False, null=False, allow_unicode=True)
    course = models.ForeignKey('university.Course', on_delete=models.PROTECT)

    class Meta:
        db_table = 'chapters'

    def __str__(self):
        return self.title