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from __future__ import unicode_literals
import os
from django.core.exceptions import ValidationError
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
from django.utils._os import upath
class Person(models.Model):
name = models.CharField(max_length=100)
class Triple(models.Model):
left = models.IntegerField()
middle = models.IntegerField()
right = models.IntegerField()
class Meta:
unique_together = (('left', 'middle'), ('middle', 'right'))
class FilePathModel(models.Model):
path = models.FilePathField(path=os.path.dirname(upath(__file__)), match=".*\.py$", blank=True)
@python_2_unicode_compatible
class Publication(models.Model):
title = models.CharField(max_length=30)
date_published = models.DateField()
def __str__(self):
return self.title
@python_2_unicode_compatible
class Article(models.Model):
headline = models.CharField(max_length=100)
publications = models.ManyToManyField(Publication)
def __str__(self):
return self.headline
class CustomFileField(models.FileField):
def save_form_data(self, instance, data):
been_here = getattr(self, 'been_saved', False)
assert not been_here, "save_form_data called more than once"
setattr(self, 'been_saved', True)
class CustomFF(models.Model):
f = CustomFileField(upload_to='unused', blank=True)
class RealPerson(models.Model):
name = models.CharField(max_length=100)
def clean(self):
if self.name.lower() == 'anonymous':
raise ValidationError("Please specify a real name.")
class Author(models.Model):
publication = models.OneToOneField(Publication, null=True, blank=True)
full_name = models.CharField(max_length=255)
class Author1(models.Model):
publication = models.OneToOneField(Publication, null=False)
full_name = models.CharField(max_length=255)
class Homepage(models.Model):
url = models.URLField()
class Document(models.Model):
myfile = models.FileField(upload_to='unused', blank=True)
class Edition(models.Model):
author = models.ForeignKey(Person)
publication = models.ForeignKey(Publication)
edition = models.IntegerField()
isbn = models.CharField(max_length=13, unique=True)
class Meta:
unique_together = (('author', 'publication'), ('publication', 'edition'),)
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