from django.db import models

class Publisher(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name

class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f"{self.start_date}/{self.end_date}"

class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE, null=True)

    def __str__(self):
        return self.title

class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)  # can be on either end

    def __str__(self):
        return f"{self.first_name} {self.last_name}"

class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)


480c94bfe8b2895ac4399a37c47936c917d511f8
<mask token>


class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f'{self.start_date}/{self.end_date}'


class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE,
        null=True)

    def __str__(self):
        return self.title


class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)

    def __str__(self):
        return f'{self.first_name} {self.last_name}'


class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)

<mask token>


class Publisher(models.Model):
    <mask token>
    <mask token>


class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f'{self.start_date}/{self.end_date}'


class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE,
        null=True)

    def __str__(self):
        return self.title


class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)

    def __str__(self):
        return f'{self.first_name} {self.last_name}'


class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)

<mask token>


class Publisher(models.Model):
    <mask token>

    def __str__(self):
        return self.name


class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f'{self.start_date}/{self.end_date}'


class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE,
        null=True)

    def __str__(self):
        return self.title


class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)

    def __str__(self):
        return f'{self.first_name} {self.last_name}'


class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)

from django.db import models


class Publisher(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name


class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f'{self.start_date}/{self.end_date}'


class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE,
        null=True)

    def __str__(self):
        return self.title


class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)

    def __str__(self):
        return f'{self.first_name} {self.last_name}'


class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)

from django.db import models

class Publisher(models.Model):
    name = models.CharField(max_length=255)

    def __str__(self):
        return self.name

class AdCampaign(models.Model):
    start_date = models.DateField()
    end_date = models.DateField()

    def __str__(self):
        return f"{self.start_date}/{self.end_date}"

class Book(models.Model):
    title = models.CharField(max_length=255)
    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
    campaign = models.OneToOneField(AdCampaign, on_delete=models.CASCADE, null=True)

    def __str__(self):
        return self.title

class Author(models.Model):
    first_name = models.CharField(max_length=64)
    last_name = models.CharField(max_length=64)
    books = models.ManyToManyField(Book)  # can be on either end

    def __str__(self):
        return f"{self.first_name} {self.last_name}"

class EveryModel(models.Model):
    the_string = models.CharField(max_length=32)
    the_int = models.IntegerField()
    the_float = models.FloatField()
    the_create_date = models.DateField(auto_now_add=True)
    the_timestamp = models.DateField(auto_now=True)
    the_boolean = models.BooleanField(default=False)
    the_decimal = models.DecimalField(decimal_places=2)
    the_email = models.EmailField(max_length=100)

