import os import tempfile try: import decimal except ImportError: from django.utils import _decimal as decimal # Python 2.3 fallback try: # Checking for the existence of Image is enough for CPython, but for PyPy, # you need to check for the underlying modules. from PIL import Image, _imaging except ImportError: Image = None from django.core.files.storage import FileSystemStorage from django.db import models from django.db.models.fields.files import ImageFieldFile, ImageField class Foo(models.Model): a = models.CharField(max_length=10) d = models.DecimalField(max_digits=5, decimal_places=3) def get_foo(): return Foo.objects.get(id=1) class Bar(models.Model): b = models.CharField(max_length=10) a = models.ForeignKey(Foo, default=get_foo) class Whiz(models.Model): CHOICES = ( ('Group 1', ( (1,'First'), (2,'Second'), ) ), ('Group 2', ( (3,'Third'), (4,'Fourth'), ) ), (0,'Other'), ) c = models.IntegerField(choices=CHOICES, null=True) class BigD(models.Model): d = models.DecimalField(max_digits=38, decimal_places=30) class BigS(models.Model): s = models.SlugField(max_length=255) class BigInt(models.Model): value = models.BigIntegerField() null_value = models.BigIntegerField(null = True, blank = True) ############################################################################### # ImageField # If PIL available, do these tests. if Image: class TestImageFieldFile(ImageFieldFile): """ Custom Field File class that records whether or not the underlying file was opened. """ def __init__(self, *args, **kwargs): self.was_opened = False super(TestImageFieldFile, self).__init__(*args,**kwargs) def open(self): self.was_opened = True super(TestImageFieldFile, self).open() class TestImageField(ImageField): attr_class = TestImageFieldFile # Set up a temp directory for file storage. temp_storage_dir = tempfile.mkdtemp() temp_storage = FileSystemStorage(temp_storage_dir) temp_upload_to_dir = os.path.join(temp_storage.location, 'tests') class Person(models.Model): """ Model that defines an ImageField with no dimension fields. """ name = models.CharField(max_length=50) mugshot = TestImageField(storage=temp_storage, upload_to='tests') class PersonWithHeight(models.Model): """ Model that defines an ImageField with only one dimension field. """ name = models.CharField(max_length=50) mugshot = TestImageField(storage=temp_storage, upload_to='tests', height_field='mugshot_height') mugshot_height = models.PositiveSmallIntegerField() class PersonWithHeightAndWidth(models.Model): """ Model that defines height and width fields after the ImageField. """ name = models.CharField(max_length=50) mugshot = TestImageField(storage=temp_storage, upload_to='tests', height_field='mugshot_height', width_field='mugshot_width') mugshot_height = models.PositiveSmallIntegerField() mugshot_width = models.PositiveSmallIntegerField() class PersonDimensionsFirst(models.Model): """ Model that defines height and width fields before the ImageField. """ name = models.CharField(max_length=50) mugshot_height = models.PositiveSmallIntegerField() mugshot_width = models.PositiveSmallIntegerField() mugshot = TestImageField(storage=temp_storage, upload_to='tests', height_field='mugshot_height', width_field='mugshot_width') class PersonTwoImages(models.Model): """ Model that: * Defines two ImageFields * Defines the height/width fields before the ImageFields * Has a nullalble ImageField """ name = models.CharField(max_length=50) mugshot_height = models.PositiveSmallIntegerField() mugshot_width = models.PositiveSmallIntegerField() mugshot = TestImageField(storage=temp_storage, upload_to='tests', height_field='mugshot_height', width_field='mugshot_width') headshot_height = models.PositiveSmallIntegerField( blank=True, null=True) headshot_width = models.PositiveSmallIntegerField( blank=True, null=True) headshot = TestImageField(blank=True, null=True, storage=temp_storage, upload_to='tests', height_field='headshot_height', width_field='headshot_width') ###############################################################################