from django.conf import settings
from django.db import models
from django.utils.encoding import python_2_unicode_compatible


@python_2_unicode_compatible
class Book(models.Model):
    isbn = models.CharField(max_length=50, unique=True)
    title = models.CharField(max_length=100)
    author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)

    def __str__(self):
        return self.title