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# -*- encoding: utf-8 -*-
from __future__ import unicode_literals
import unittest
from django.core.checks import Error
from django.core.exceptions import ImproperlyConfigured
from django.db import connection, models
from .base import IsolatedModelsTestCase
class AutoFieldTests(IsolatedModelsTestCase):
def test_valid_case(self):
class Model(models.Model):
id = models.AutoField(primary_key=True)
field = Model._meta.get_field('id')
errors = field.check()
expected = []
self.assertEqual(errors, expected)
def test_primary_key(self):
# primary_key must be True. Refs #12467.
class Model(models.Model):
field = models.AutoField(primary_key=False)
# Prevent Django from autocreating `id` AutoField, which would
# result in an error, because a model must have exactly one
# AutoField.
another = models.IntegerField(primary_key=True)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
'AutoFields must set primary_key=True.',
hint=None,
obj=field,
id='fields.E100',
),
]
self.assertEqual(errors, expected)
class BooleanFieldTests(IsolatedModelsTestCase):
def test_nullable_boolean_field(self):
class Model(models.Model):
field = models.BooleanField(null=True)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
'BooleanFields do not accept null values.',
hint='Use a NullBooleanField instead.',
obj=field,
id='fields.E110',
),
]
self.assertEqual(errors, expected)
class CharFieldTests(IsolatedModelsTestCase):
def test_valid_field(self):
class Model(models.Model):
field = models.CharField(
max_length=255,
choices=[
('1', 'item1'),
('2', 'item2'),
],
db_index=True)
field = Model._meta.get_field('field')
errors = field.check()
expected = []
self.assertEqual(errors, expected)
def test_missing_max_length(self):
class Model(models.Model):
field = models.CharField()
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"CharFields must define a 'max_length' attribute.",
hint=None,
obj=field,
id='fields.E120',
),
]
self.assertEqual(errors, expected)
def test_negative_max_length(self):
class Model(models.Model):
field = models.CharField(max_length=-1)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'max_length' must be a positive integer.",
hint=None,
obj=field,
id='fields.E121',
),
]
self.assertEqual(errors, expected)
def test_bad_max_length_value(self):
class Model(models.Model):
field = models.CharField(max_length="bad")
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'max_length' must be a positive integer.",
hint=None,
obj=field,
id='fields.E121',
),
]
self.assertEqual(errors, expected)
def test_non_iterable_choices(self):
class Model(models.Model):
field = models.CharField(max_length=10, choices='bad')
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'choices' must be an iterable (e.g., a list or tuple).",
hint=None,
obj=field,
id='fields.E004',
),
]
self.assertEqual(errors, expected)
def test_choices_containing_non_pairs(self):
class Model(models.Model):
field = models.CharField(max_length=10, choices=[(1, 2, 3), (1, 2, 3)])
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'choices' must be an iterable containing (actual value, human readable name) tuples.",
hint=None,
obj=field,
id='fields.E005',
),
]
self.assertEqual(errors, expected)
def test_bad_db_index_value(self):
class Model(models.Model):
field = models.CharField(max_length=10, db_index='bad')
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'db_index' must be None, True or False.",
hint=None,
obj=field,
id='fields.E006',
),
]
self.assertEqual(errors, expected)
@unittest.skipUnless(connection.vendor == 'mysql',
"Test valid only for MySQL")
def test_too_long_char_field_under_mysql(self):
from django.db.backends.mysql.validation import DatabaseValidation
class Model(models.Model):
field = models.CharField(unique=True, max_length=256)
field = Model._meta.get_field('field')
validator = DatabaseValidation(connection=None)
errors = validator.check_field(field)
expected = [
Error(
'MySQL does not allow unique CharFields to have a max_length > 255.',
hint=None,
obj=field,
id='mysql.E001',
)
]
self.assertEqual(errors, expected)
class DecimalFieldTests(IsolatedModelsTestCase):
def test_required_attributes(self):
class Model(models.Model):
field = models.DecimalField()
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"DecimalFields must define a 'decimal_places' attribute.",
hint=None,
obj=field,
id='fields.E130',
),
Error(
"DecimalFields must define a 'max_digits' attribute.",
hint=None,
obj=field,
id='fields.E132',
),
]
self.assertEqual(errors, expected)
def test_negative_max_digits_and_decimal_places(self):
class Model(models.Model):
field = models.DecimalField(max_digits=-1, decimal_places=-1)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'decimal_places' must be a non-negative integer.",
hint=None,
obj=field,
id='fields.E131',
),
Error(
"'max_digits' must be a positive integer.",
hint=None,
obj=field,
id='fields.E133',
),
]
self.assertEqual(errors, expected)
def test_bad_values_of_max_digits_and_decimal_places(self):
class Model(models.Model):
field = models.DecimalField(max_digits="bad", decimal_places="bad")
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'decimal_places' must be a non-negative integer.",
hint=None,
obj=field,
id='fields.E131',
),
Error(
"'max_digits' must be a positive integer.",
hint=None,
obj=field,
id='fields.E133',
),
]
self.assertEqual(errors, expected)
def test_decimal_places_greater_than_max_digits(self):
class Model(models.Model):
field = models.DecimalField(max_digits=9, decimal_places=10)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'max_digits' must be greater or equal to 'decimal_places'.",
hint=None,
obj=field,
id='fields.E134',
),
]
self.assertEqual(errors, expected)
def test_valid_field(self):
class Model(models.Model):
field = models.DecimalField(max_digits=10, decimal_places=10)
field = Model._meta.get_field('field')
errors = field.check()
expected = []
self.assertEqual(errors, expected)
class FileFieldTests(IsolatedModelsTestCase):
def test_valid_case(self):
class Model(models.Model):
field = models.FileField(upload_to='somewhere')
field = Model._meta.get_field('field')
errors = field.check()
expected = []
self.assertEqual(errors, expected)
def test_unique(self):
class Model(models.Model):
field = models.FileField(unique=False, upload_to='somewhere')
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'unique' is not a valid argument for a FileField.",
hint=None,
obj=field,
id='fields.E200',
)
]
self.assertEqual(errors, expected)
def test_primary_key(self):
class Model(models.Model):
field = models.FileField(primary_key=False, upload_to='somewhere')
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"'primary_key' is not a valid argument for a FileField.",
hint=None,
obj=field,
id='fields.E201',
)
]
self.assertEqual(errors, expected)
class FilePathFieldTests(IsolatedModelsTestCase):
def test_forbidden_files_and_folders(self):
class Model(models.Model):
field = models.FilePathField(allow_files=False, allow_folders=False)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
"FilePathFields must have either 'allow_files' or 'allow_folders' set to True.",
hint=None,
obj=field,
id='fields.E140',
),
]
self.assertEqual(errors, expected)
class GenericIPAddressFieldTests(IsolatedModelsTestCase):
def test_non_nullable_blank(self):
class Model(models.Model):
field = models.GenericIPAddressField(null=False, blank=True)
field = Model._meta.get_field('field')
errors = field.check()
expected = [
Error(
('GenericIPAddressFields cannot have blank=True if null=False, '
'as blank values are stored as nulls.'),
hint=None,
obj=field,
id='fields.E150',
),
]
self.assertEqual(errors, expected)
class ImageFieldTests(IsolatedModelsTestCase):
def test_pillow_installed(self):
try:
import django.utils.image # NOQA
except ImproperlyConfigured:
pillow_installed = False
else:
pillow_installed = True
class Model(models.Model):
field = models.ImageField(upload_to='somewhere')
field = Model._meta.get_field('field')
errors = field.check()
expected = [] if pillow_installed else [
Error(
'Cannot use ImageField because Pillow is not installed.',
hint=('Get Pillow at https://pypi.python.org/pypi/Pillow '
'or run command "pip install pillow".'),
obj=field,
id='fields.E210',
),
]
self.assertEqual(errors, expected)
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