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from django.contrib.auth.models import User
from django.contrib.contenttypes.fields import (
GenericForeignKey, GenericRelation,
)
from django.contrib.contenttypes.models import ContentType
from django.db import models
class Book(models.Model):
title = models.CharField(max_length=50)
year = models.PositiveIntegerField(null=True, blank=True)
author = models.ForeignKey(
User,
models.SET_NULL,
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,
)
employee = models.ForeignKey(
'Employee',
models.SET_NULL,
verbose_name='Employee',
blank=True, null=True,
)
is_best_seller = models.BooleanField(default=0, null=True)
is_best_seller2 = models.NullBooleanField(default=0)
date_registered = models.DateField(null=True)
availability = models.BooleanField(choices=(
(False, 'Paid'),
(True, 'Free'),
(None, 'Obscure'),
), null=True)
# This field name is intentionally 2 characters long (#16080).
no = models.IntegerField(verbose_name='number', blank=True, null=True)
def __str__(self):
return self.title
class ImprovedBook(models.Model):
book = models.OneToOneField(Book, models.CASCADE)
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
class Employee(models.Model):
department = models.ForeignKey(Department, models.CASCADE, to_field="code")
name = models.CharField(max_length=100)
def __str__(self):
return self.name
class TaggedItem(models.Model):
tag = models.SlugField()
content_type = models.ForeignKey(ContentType, models.CASCADE, related_name='tagged_items')
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey('content_type', 'object_id')
def __str__(self):
return self.tag
class Bookmark(models.Model):
url = models.URLField()
tags = GenericRelation(TaggedItem)
CHOICES = [
('a', 'A'),
(None, 'None'),
('', '-'),
]
none_or_null = models.CharField(max_length=20, choices=CHOICES, blank=True, null=True)
def __str__(self):
return self.url
|
