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from __future__ import unicode_literals
from django.apps import apps
from django.db import models
from django.test import SimpleTestCase, override_settings
from django.test.utils import isolate_lru_cache
from django.utils import six
class FieldDeconstructionTests(SimpleTestCase):
"""
Tests the deconstruct() method on all core fields.
"""
def test_name(self):
"""
Tests the outputting of the correct name if assigned one.
"""
# First try using a "normal" field
field = models.CharField(max_length=65)
name, path, args, kwargs = field.deconstruct()
self.assertIsNone(name)
field.set_attributes_from_name("is_awesome_test")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(name, "is_awesome_test")
self.assertIsInstance(name, six.text_type)
# Now try with a ForeignKey
field = models.ForeignKey("some_fake.ModelName", models.CASCADE)
name, path, args, kwargs = field.deconstruct()
self.assertIsNone(name)
field.set_attributes_from_name("author")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(name, "author")
def test_auto_field(self):
field = models.AutoField(primary_key=True)
field.set_attributes_from_name("id")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.AutoField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"primary_key": True})
def test_big_integer_field(self):
field = models.BigIntegerField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.BigIntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_boolean_field(self):
field = models.BooleanField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.BooleanField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.BooleanField(default=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.BooleanField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"default": True})
def test_char_field(self):
field = models.CharField(max_length=65)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.CharField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 65})
field = models.CharField(max_length=65, null=True, blank=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.CharField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 65, "null": True, "blank": True})
def test_char_field_choices(self):
field = models.CharField(max_length=1, choices=(("A", "One"), ("B", "Two")))
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.CharField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"choices": [("A", "One"), ("B", "Two")], "max_length": 1})
def test_csi_field(self):
field = models.CommaSeparatedIntegerField(max_length=100)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.CommaSeparatedIntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 100})
def test_date_field(self):
field = models.DateField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DateField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.DateField(auto_now=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DateField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"auto_now": True})
def test_datetime_field(self):
field = models.DateTimeField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DateTimeField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.DateTimeField(auto_now_add=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DateTimeField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"auto_now_add": True})
# Bug #21785
field = models.DateTimeField(auto_now=True, auto_now_add=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DateTimeField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"auto_now_add": True, "auto_now": True})
def test_decimal_field(self):
field = models.DecimalField(max_digits=5, decimal_places=2)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DecimalField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_digits": 5, "decimal_places": 2})
def test_decimal_field_0_decimal_places(self):
"""
A DecimalField with decimal_places=0 should work (#22272).
"""
field = models.DecimalField(max_digits=5, decimal_places=0)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.DecimalField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_digits": 5, "decimal_places": 0})
def test_email_field(self):
field = models.EmailField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.EmailField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 254})
field = models.EmailField(max_length=255)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.EmailField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 255})
def test_file_field(self):
field = models.FileField(upload_to="foo/bar")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.FileField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"upload_to": "foo/bar"})
# Test max_length
field = models.FileField(upload_to="foo/bar", max_length=200)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.FileField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"upload_to": "foo/bar", "max_length": 200})
def test_file_path_field(self):
field = models.FilePathField(match=".*\.txt$")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.FilePathField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"match": ".*\.txt$"})
field = models.FilePathField(recursive=True, allow_folders=True, max_length=123)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.FilePathField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"recursive": True, "allow_folders": True, "max_length": 123})
def test_float_field(self):
field = models.FloatField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.FloatField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_foreign_key(self):
# Test basic pointing
from django.contrib.auth.models import Permission
field = models.ForeignKey("auth.Permission", models.CASCADE)
field.remote_field.model = Permission
field.remote_field.field_name = "id"
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "on_delete": models.CASCADE})
self.assertFalse(hasattr(kwargs['to'], "setting_name"))
# Test swap detection for swappable model
field = models.ForeignKey("auth.User", models.CASCADE)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.User", "on_delete": models.CASCADE})
self.assertEqual(kwargs['to'].setting_name, "AUTH_USER_MODEL")
# Test nonexistent (for now) model
field = models.ForeignKey("something.Else", models.CASCADE)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "something.Else", "on_delete": models.CASCADE})
# Test on_delete
field = models.ForeignKey("auth.User", models.SET_NULL)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.User", "on_delete": models.SET_NULL})
# Test to_field preservation
field = models.ForeignKey("auth.Permission", models.CASCADE, to_field="foobar")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "to_field": "foobar", "on_delete": models.CASCADE})
# Test related_name preservation
field = models.ForeignKey("auth.Permission", models.CASCADE, related_name="foobar")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "foobar", "on_delete": models.CASCADE})
@override_settings(AUTH_USER_MODEL="auth.Permission")
def test_foreign_key_swapped(self):
with isolate_lru_cache(apps.get_swappable_settings_name):
# It doesn't matter that we swapped out user for permission;
# there's no validation. We just want to check the setting stuff works.
field = models.ForeignKey("auth.Permission", models.CASCADE)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ForeignKey")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "on_delete": models.CASCADE})
self.assertEqual(kwargs['to'].setting_name, "AUTH_USER_MODEL")
def test_image_field(self):
field = models.ImageField(upload_to="foo/barness", width_field="width", height_field="height")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ImageField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"upload_to": "foo/barness", "width_field": "width", "height_field": "height"})
def test_integer_field(self):
field = models.IntegerField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.IntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_ip_address_field(self):
field = models.IPAddressField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.IPAddressField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_generic_ip_address_field(self):
field = models.GenericIPAddressField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.GenericIPAddressField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.GenericIPAddressField(protocol="IPv6")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.GenericIPAddressField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"protocol": "IPv6"})
def test_many_to_many_field(self):
# Test normal
field = models.ManyToManyField("auth.Permission")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission"})
self.assertFalse(hasattr(kwargs['to'], "setting_name"))
# Test swappable
field = models.ManyToManyField("auth.User")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.User"})
self.assertEqual(kwargs['to'].setting_name, "AUTH_USER_MODEL")
# Test through
field = models.ManyToManyField("auth.Permission", through="auth.Group")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "through": "auth.Group"})
# Test custom db_table
field = models.ManyToManyField("auth.Permission", db_table="custom_table")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "db_table": "custom_table"})
# Test related_name
field = models.ManyToManyField("auth.Permission", related_name="custom_table")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission", "related_name": "custom_table"})
@override_settings(AUTH_USER_MODEL="auth.Permission")
def test_many_to_many_field_swapped(self):
with isolate_lru_cache(apps.get_swappable_settings_name):
# It doesn't matter that we swapped out user for permission;
# there's no validation. We just want to check the setting stuff works.
field = models.ManyToManyField("auth.Permission")
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.ManyToManyField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"to": "auth.Permission"})
self.assertEqual(kwargs['to'].setting_name, "AUTH_USER_MODEL")
def test_null_boolean_field(self):
field = models.NullBooleanField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.NullBooleanField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_positive_integer_field(self):
field = models.PositiveIntegerField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.PositiveIntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_positive_small_integer_field(self):
field = models.PositiveSmallIntegerField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.PositiveSmallIntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_slug_field(self):
field = models.SlugField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.SlugField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.SlugField(db_index=False, max_length=231)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.SlugField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"db_index": False, "max_length": 231})
def test_small_integer_field(self):
field = models.SmallIntegerField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.SmallIntegerField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_text_field(self):
field = models.TextField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.TextField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
def test_time_field(self):
field = models.TimeField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.TimeField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.TimeField(auto_now=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(args, [])
self.assertEqual(kwargs, {'auto_now': True})
field = models.TimeField(auto_now_add=True)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(args, [])
self.assertEqual(kwargs, {'auto_now_add': True})
def test_url_field(self):
field = models.URLField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.URLField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
field = models.URLField(max_length=231)
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.URLField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {"max_length": 231})
def test_binary_field(self):
field = models.BinaryField()
name, path, args, kwargs = field.deconstruct()
self.assertEqual(path, "django.db.models.BinaryField")
self.assertEqual(args, [])
self.assertEqual(kwargs, {})
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