from django.db import models


class Person(models.Model):
    first_name = models.CharField(max_length=100, unique=True)
    last_name = models.CharField(max_length=100)
    birthday = models.DateField()
    defaults = models.TextField()


class DefaultPerson(models.Model):
    first_name = models.CharField(max_length=100, default="Anonymous")


class ManualPrimaryKeyTest(models.Model):
    id = models.IntegerField(primary_key=True)
    data = models.CharField(max_length=100)


class Profile(models.Model):
    person = models.ForeignKey(Person, models.CASCADE, primary_key=True)


class Tag(models.Model):
    text = models.CharField(max_length=255, unique=True)


class Thing(models.Model):
    name = models.CharField(max_length=255)
    tags = models.ManyToManyField(Tag)

    @property
    def capitalized_name_property(self):
        return self.name

    @capitalized_name_property.setter
    def capitalized_name_property(self, val):
        self.name = val.capitalize()

    @property
    def name_in_all_caps(self):
        return self.name.upper()


class Publisher(models.Model):
    name = models.CharField(max_length=100)


class Author(models.Model):
    name = models.CharField(max_length=100)


class Book(models.Model):
    name = models.CharField(max_length=100)
    authors = models.ManyToManyField(Author, related_name='books')
    publisher = models.ForeignKey(
        Publisher,
        models.CASCADE,
        related_name='books',
        db_column="publisher_id_column",
    )
