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from __future__ import unicode_literals
from django.contrib.auth.models import User
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
@python_2_unicode_compatible
class Book(models.Model):
title = models.CharField(max_length=50)
year = models.PositiveIntegerField(null=True, blank=True)
author = models.ForeignKey(User, verbose_name="Verbose Author", related_name='books_authored', blank=True, null=True)
contributors = models.ManyToManyField(User, verbose_name="Verbose Contributors", related_name='books_contributed', blank=True, null=True)
is_best_seller = models.NullBooleanField(default=0)
date_registered = models.DateField(null=True)
no = models.IntegerField(verbose_name='number', blank=True, null=True) # This field is intentionally 2 characters long. See #16080.
def __str__(self):
return self.title
@python_2_unicode_compatible
class Department(models.Model):
code = models.CharField(max_length=4, unique=True)
description = models.CharField(max_length=50, blank=True, null=True)
def __str__(self):
return self.description
@python_2_unicode_compatible
class Employee(models.Model):
department = models.ForeignKey(Department, to_field="code")
name = models.CharField(max_length=100)
def __str__(self):
return self.name
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