"""

Testing signals before/after saving and deleting.

"""

from django.db import models

class Person(models.Model):

    first_name = models.CharField(max_length=20)

    last_name = models.CharField(max_length=20)

    def __str__(self):

        return "%s %s" % (self.first_name, self.last_name)

class Car(models.Model):

    make = models.CharField(max_length=20)

    model = models.CharField(max_length=20)

class Author(models.Model):

    name = models.CharField(max_length=20)

    def __str__(self):

        return self.name

class Book(models.Model):

    name = models.CharField(max_length=20)

    authors = models.ManyToManyField(Author)

    def __str__(self):

        return self.name

class Page(models.Model):

    book = models.ForeignKey(Book, on_delete=models.CASCADE)

    text = models.TextField()