def _check_unique(self, **kwargs):
return [
checks.Warning(
'Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.',
hint='ForeignKey(unique=True) is usually better served by a OneToOneField.',
obj=self,
id='fields.W342',
)
] if self.unique else []
python类Warning()的实例源码
def _check_deprecation_details(self):
if self.system_check_removed_details is not None:
return [
checks.Error(
self.system_check_removed_details.get(
'msg',
'%s has been removed except for support in historical '
'migrations.' % self.__class__.__name__
),
hint=self.system_check_removed_details.get('hint'),
obj=self,
id=self.system_check_removed_details.get('id', 'fields.EXXX'),
)
]
elif self.system_check_deprecated_details is not None:
return [
checks.Warning(
self.system_check_deprecated_details.get(
'msg',
'%s has been deprecated.' % self.__class__.__name__
),
hint=self.system_check_deprecated_details.get('hint'),
obj=self,
id=self.system_check_deprecated_details.get('id', 'fields.WXXX'),
)
]
return []
def _check_max_length_warning(self):
if self.max_length is not None:
return [
checks.Warning(
"'max_length' is ignored when used with IntegerField",
hint="Remove 'max_length' from field",
obj=self,
id='fields.W122',
)
]
return []
def _check_salt_is_set(self):
if self.salt is None or self.salt == "":
return [
checks.Warning(
"'salt' is not set",
hint="Pass a salt value in your field or set settings.HASHID_FIELD_SALT",
obj=self,
id="HashidField.W001",
)
]
return []
def test_context_processor_not_installed_in_TEMPLATES(self):
templates = deepcopy(settings.TEMPLATES)
templates[0]['OPTIONS']['context_processors'].remove(apps.CONTEXT)
with self.settings(TEMPLATES=templates):
errors = apps.check_context_processor_installed()
self.assertEqual(1, len(errors))
self.assertTrue(isinstance(errors[0], checks.Warning))
self.assertEqual('boardinghouse.W001', errors[0].id)
def test_no_context_processors_found(self):
del settings.TEMPLATES
errors = apps.check_context_processor_installed()
self.assertEqual(1, len(errors))
self.assertTrue(isinstance(errors[0], checks.Warning))
self.assertEqual('boardinghouse.W001', errors[0].id)
def check_context_processor_installed(app_configs=None, **kwargs):
"Warn if our context processor is not installed."
from django.conf import settings
errors = []
if hasattr(settings, 'TEMPLATES'):
for i, engine in enumerate(settings.TEMPLATES):
# We only check for the context processor if using the default django backend.
if engine['BACKEND'] != 'django.template.backends.django.DjangoTemplates':
continue
if CONTEXT not in engine.get('OPTIONS', {}).get('context_processors', []):
errors.append(Warning(
'Missing boardinghouse context processor',
hint="Add '{1}' to settings.TEMPLATES[{0}]"
"['OPTIONS']['context_processors']".format(i, CONTEXT),
id='boardinghouse.W001'
))
elif hasattr(settings, 'TEMPLATE_CONTEXT_PROCESSORS'):
if CONTEXT not in settings.TEMPLATE_CONTEXT_PROCESSORS:
errors.append(Warning(
'Missing boardinghouse context processor',
hint="Add '{0}' to settings.TEMPLATE_CONTEXT_PROCESSORS".format(CONTEXT),
id='boardinghouse.W001'
))
else:
errors.append(Warning(
'Missing boardinghouse context processor (no TEMPLATES defined)',
hint="Configure settings.TEMPLATES and add '{0}'".format(CONTEXT),
id='boardinghouse.W001',
))
return errors
def _check_unique(self, **kwargs):
return [
checks.Warning(
'Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.',
hint='ForeignKey(unique=True) is usually better served by a OneToOneField.',
obj=self,
id='fields.W342',
)
] if self.unique else []
def _check_deprecation_details(self):
if self.system_check_removed_details is not None:
return [
checks.Error(
self.system_check_removed_details.get(
'msg',
'%s has been removed except for support in historical '
'migrations.' % self.__class__.__name__
),
hint=self.system_check_removed_details.get('hint'),
obj=self,
id=self.system_check_removed_details.get('id', 'fields.EXXX'),
)
]
elif self.system_check_deprecated_details is not None:
return [
checks.Warning(
self.system_check_deprecated_details.get(
'msg',
'%s has been deprecated.' % self.__class__.__name__
),
hint=self.system_check_deprecated_details.get('hint'),
obj=self,
id=self.system_check_deprecated_details.get('id', 'fields.WXXX'),
)
]
return []
def _check_max_length_warning(self):
if self.max_length is not None:
return [
checks.Warning(
"'max_length' is ignored when used with IntegerField",
hint="Remove 'max_length' from field",
obj=self,
id='fields.W122',
)
]
return []
def _check_unique(self, **kwargs):
return [
checks.Warning(
'Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.',
hint='ForeignKey(unique=True) is usually better served by a OneToOneField.',
obj=self,
id='fields.W342',
)
] if self.unique else []
def _check_ignored_options(self, **kwargs):
warnings = []
if self.has_null_arg:
warnings.append(
checks.Warning(
'null has no effect on ManyToManyField.',
obj=self,
id='fields.W340',
)
)
if len(self._validators) > 0:
warnings.append(
checks.Warning(
'ManyToManyField does not support validators.',
obj=self,
id='fields.W341',
)
)
if (self.remote_field.limit_choices_to and self.remote_field.through and
not self.remote_field.through._meta.auto_created):
warnings.append(
checks.Warning(
'limit_choices_to has no effect on ManyToManyField '
'with a through model.',
obj=self,
id='fields.W343',
)
)
return warnings
def _check_deprecation_details(self):
if self.system_check_removed_details is not None:
return [
checks.Error(
self.system_check_removed_details.get(
'msg',
'%s has been removed except for support in historical '
'migrations.' % self.__class__.__name__
),
hint=self.system_check_removed_details.get('hint'),
obj=self,
id=self.system_check_removed_details.get('id', 'fields.EXXX'),
)
]
elif self.system_check_deprecated_details is not None:
return [
checks.Warning(
self.system_check_deprecated_details.get(
'msg',
'%s has been deprecated.' % self.__class__.__name__
),
hint=self.system_check_deprecated_details.get('hint'),
obj=self,
id=self.system_check_deprecated_details.get('id', 'fields.WXXX'),
)
]
return []
def _check_max_length_warning(self):
if self.max_length is not None:
return [
checks.Warning(
"'max_length' is ignored when used with IntegerField",
hint="Remove 'max_length' from field",
obj=self,
id='fields.W122',
)
]
return []
def _check_unique(self, **kwargs):
return [
checks.Warning(
'Setting unique=True on a ForeignKey has the same effect as using a OneToOneField.',
hint='ForeignKey(unique=True) is usually better served by a OneToOneField.',
obj=self,
id='fields.W342',
)
] if self.unique else []
def _check_deprecation_details(self):
if self.system_check_removed_details is not None:
return [
checks.Error(
self.system_check_removed_details.get(
'msg',
'%s has been removed except for support in historical '
'migrations.' % self.__class__.__name__
),
hint=self.system_check_removed_details.get('hint'),
obj=self,
id=self.system_check_removed_details.get('id', 'fields.EXXX'),
)
]
elif self.system_check_deprecated_details is not None:
return [
checks.Warning(
self.system_check_deprecated_details.get(
'msg',
'%s has been deprecated.' % self.__class__.__name__
),
hint=self.system_check_deprecated_details.get('hint'),
obj=self,
id=self.system_check_deprecated_details.get('id', 'fields.WXXX'),
)
]
return []
def _check_max_length_warning(self):
if self.max_length is not None:
return [
checks.Warning(
"'max_length' is ignored when used with IntegerField",
hint="Remove 'max_length' from field",
obj=self,
id='fields.W122',
)
]
return []
def check_user_model(**kwargs):
errors = []
cls = apps.get_model(settings.AUTH_USER_MODEL)
# Check that REQUIRED_FIELDS is a list
if not isinstance(cls.REQUIRED_FIELDS, (list, tuple)):
errors.append(
checks.Error(
"'REQUIRED_FIELDS' must be a list or tuple.",
hint=None,
obj=cls,
id='auth.E001',
)
)
# Check that the USERNAME FIELD isn't included in REQUIRED_FIELDS.
if cls.USERNAME_FIELD in cls.REQUIRED_FIELDS:
errors.append(
checks.Error(
("The field named as the 'USERNAME_FIELD' "
"for a custom user model must not be included in 'REQUIRED_FIELDS'."),
hint=None,
obj=cls,
id='auth.E002',
)
)
# Check that the username field is unique
if not cls._meta.get_field(cls.USERNAME_FIELD).unique:
if (settings.AUTHENTICATION_BACKENDS ==
['django.contrib.auth.backends.ModelBackend']):
errors.append(
checks.Error(
"'%s.%s' must be unique because it is named as the 'USERNAME_FIELD'." % (
cls._meta.object_name, cls.USERNAME_FIELD
),
hint=None,
obj=cls,
id='auth.E003',
)
)
else:
errors.append(
checks.Warning(
"'%s.%s' is named as the 'USERNAME_FIELD', but it is not unique." % (
cls._meta.object_name, cls.USERNAME_FIELD
),
hint=('Ensure that your authentication backend(s) can handle '
'non-unique usernames.'),
obj=cls,
id='auth.W004',
)
)
return errors
def _check_fix_default_value(self):
"""
Adds a warning to the checks framework stating, that using an actual
date or datetime value is probably wrong; it's only being evaluated on
server start-up.
For details see ticket #21905
"""
if not self.has_default():
return []
now = timezone.now()
if not timezone.is_naive(now):
now = timezone.make_naive(now, timezone.utc)
value = self.default
if isinstance(value, datetime.datetime):
if not timezone.is_naive(value):
value = timezone.make_naive(value, timezone.utc)
value = value.date()
elif isinstance(value, datetime.date):
# Nothing to do, as dates don't have tz information
pass
else:
# No explicit date / datetime value -- no checks necessary
return []
offset = datetime.timedelta(days=1)
lower = (now - offset).date()
upper = (now + offset).date()
if lower <= value <= upper:
return [
checks.Warning(
'Fixed default value provided.',
hint='It seems you set a fixed date / time / datetime '
'value as default for this field. This may not be '
'what you want. If you want to have the current date '
'as default, use `django.utils.timezone.now`',
obj=self,
id='fields.W161',
)
]
return []
def _check_fix_default_value(self):
"""
Adds a warning to the checks framework stating, that using an actual
time or datetime value is probably wrong; it's only being evaluated on
server start-up.
For details see ticket #21905
"""
if not self.has_default():
return []
now = timezone.now()
if not timezone.is_naive(now):
now = timezone.make_naive(now, timezone.utc)
value = self.default
if isinstance(value, datetime.datetime):
second_offset = datetime.timedelta(seconds=10)
lower = now - second_offset
upper = now + second_offset
if timezone.is_aware(value):
value = timezone.make_naive(value, timezone.utc)
elif isinstance(value, datetime.time):
second_offset = datetime.timedelta(seconds=10)
lower = now - second_offset
upper = now + second_offset
value = datetime.datetime.combine(now.date(), value)
if timezone.is_aware(value):
value = timezone.make_naive(value, timezone.utc).time()
else:
# No explicit time / datetime value -- no checks necessary
return []
if lower <= value <= upper:
return [
checks.Warning(
'Fixed default value provided.',
hint='It seems you set a fixed date / time / datetime '
'value as default for this field. This may not be '
'what you want. If you want to have the current date '
'as default, use `django.utils.timezone.now`',
obj=self,
id='fields.W161',
)
]
return []
