本文整理汇总了Python中django.db.utils.NotSupportedError方法的典型用法代码示例。如果您正苦于以下问题:Python utils.NotSupportedError方法的具体用法?Python utils.NotSupportedError怎么用?Python utils.NotSupportedError使用的例子?那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类django.db.utils
的用法示例。
在下文中一共展示了utils.NotSupportedError方法的15个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: callproc
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def callproc(self, procname, params=None, kparams=None):
# Keyword parameters for callproc aren't supported in PEP 249, but the
# database driver may support them (e.g. cx_Oracle).
if kparams is not None and not self.db.features.supports_callproc_kwargs:
raise NotSupportedError(
'Keyword parameters for callproc are not supported on this '
'database backend.'
)
self.db.validate_no_broken_transaction()
with self.db.wrap_database_errors:
if params is None and kparams is None:
return self.cursor.callproc(procname)
elif kparams is None:
return self.cursor.callproc(procname, params)
else:
params = params or ()
return self.cursor.callproc(procname, params, kparams)
示例2: test_model_mocker_does_not_interfere_with_non_mocked_models
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_model_mocker_does_not_interfere_with_non_mocked_models(self):
original_objects = CarVariation.objects
with ModelMocker(Manufacturer) as make_mocker:
self.assertEqual(Manufacturer.objects, make_mocker.objects)
with ModelMocker(Car, outer=False) as car_mocker:
self.assertEqual(Car.objects, car_mocker.objects)
self.assertEqual(CarVariation.objects, original_objects)
with self.assertRaises(NotSupportedError):
CarVariation.objects.create(color='blue')
with self.assertRaises(NotSupportedError):
CarVariation(color='blue').save()
with self.assertRaises(NotSupportedError):
CarVariation(id=1, color='blue').save()
with self.assertRaises(NotSupportedError):
CarVariation(pk=1).delete()
with self.assertRaises(NotSupportedError):
CarVariation.objects.all().delete()
示例3: check_expression_support
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def check_expression_support(self, expression):
bad_fields = (fields.DateField, fields.DateTimeField, fields.TimeField)
bad_aggregates = (aggregates.Sum, aggregates.Avg, aggregates.Variance, aggregates.StdDev)
if isinstance(expression, bad_aggregates):
for expr in expression.get_source_expressions():
try:
output_field = expr.output_field
except FieldError:
# Not every subexpression has an output_field which is fine
# to ignore.
pass
else:
if isinstance(output_field, bad_fields):
raise utils.NotSupportedError(
'You cannot use Sum, Avg, StdDev, and Variance '
'aggregations on date/time fields in sqlite3 '
'since date/time is saved as text.'
)
示例4: test_field_rename_inside_atomic_block
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_field_rename_inside_atomic_block(self):
"""
NotImplementedError is raised when a model field rename is attempted
inside an atomic block.
"""
new_field = CharField(max_length=255, unique=True)
new_field.set_attributes_from_name('renamed')
msg = (
"Renaming the 'backends_author'.'name' column while in a "
"transaction is not supported on SQLite because it would break "
"referential integrity. Try adding `atomic = False` to the "
"Migration class."
)
with self.assertRaisesMessage(NotSupportedError, msg):
with connection.schema_editor(atomic=True) as editor:
editor.alter_field(Author, Author._meta.get_field('name'), new_field)
示例5: test_field_rename_inside_atomic_block
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_field_rename_inside_atomic_block(self):
"""
NotImplementedError is raised when a model field rename is attempted
inside an atomic block.
"""
new_field = CharField(max_length=255, unique=True)
new_field.set_attributes_from_name('renamed')
msg = (
"Renaming the 'backends_author'.'name' column while in a "
"transaction is not supported on SQLite < 3.26 because it would "
"break referential integrity. Try adding `atomic = False` to the "
"Migration class."
)
with self.assertRaisesMessage(NotSupportedError, msg):
with connection.schema_editor(atomic=True) as editor:
editor.alter_field(Author, Author._meta.get_field('name'), new_field)
示例6: alter_db_table
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def alter_db_table(self, model, old_db_table, new_db_table, disable_constraints=True):
if model._meta.related_objects and disable_constraints:
if self.connection.in_atomic_block:
raise NotSupportedError((
'Renaming the %r table while in a transaction is not '
'supported on SQLite because it would break referential '
'integrity. Try adding `atomic = False` to the Migration class.'
) % old_db_table)
self.connection.enable_constraint_checking()
super().alter_db_table(model, old_db_table, new_db_table)
self.connection.disable_constraint_checking()
else:
super().alter_db_table(model, old_db_table, new_db_table)
示例7: alter_field
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def alter_field(self, model, old_field, new_field, strict=False):
old_field_name = old_field.name
if (new_field.name != old_field_name and
any(r.field_name == old_field.name for r in model._meta.related_objects)):
if self.connection.in_atomic_block:
raise NotSupportedError((
'Renaming the %r.%r column while in a transaction is not '
'supported on SQLite because it would break referential '
'integrity. Try adding `atomic = False` to the Migration class.'
) % (model._meta.db_table, old_field_name))
with atomic(self.connection.alias):
super().alter_field(model, old_field, new_field, strict=strict)
# Follow SQLite's documented procedure for performing changes
# that don't affect the on-disk content.
# https://sqlite.org/lang_altertable.html#otheralter
with self.connection.cursor() as cursor:
schema_version = cursor.execute('PRAGMA schema_version').fetchone()[0]
cursor.execute('PRAGMA writable_schema = 1')
table_name = model._meta.db_table
references_template = ' REFERENCES "%s" ("%%s") ' % table_name
old_column_name = old_field.get_attname_column()[1]
new_column_name = new_field.get_attname_column()[1]
search = references_template % old_column_name
replacement = references_template % new_column_name
cursor.execute('UPDATE sqlite_master SET sql = replace(sql, %s, %s)', (search, replacement))
cursor.execute('PRAGMA schema_version = %d' % (schema_version + 1))
cursor.execute('PRAGMA writable_schema = 0')
# The integrity check will raise an exception and rollback
# the transaction if the sqlite_master updates corrupt the
# database.
cursor.execute('PRAGMA integrity_check')
# Perform a VACUUM to refresh the database representation from
# the sqlite_master table.
with self.connection.cursor() as cursor:
cursor.execute('VACUUM')
else:
super().alter_field(model, old_field, new_field, strict=strict)
示例8: mock_django_connection
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def mock_django_connection(disabled_features=None):
""" Overwrite the Django database configuration with a mocked version.
This is a helper function that does the actual monkey patching.
"""
db = connections.databases['default']
db['PASSWORD'] = '****'
db['USER'] = '**Database disabled for unit tests**'
ConnectionHandler.__getitem__ = MagicMock(name='mock_connection')
# noinspection PyUnresolvedReferences
mock_connection = ConnectionHandler.__getitem__.return_value
if disabled_features:
for feature in disabled_features:
setattr(mock_connection.features, feature, False)
mock_ops = mock_connection.ops
# noinspection PyUnusedLocal
def compiler(queryset, connection, using, **kwargs):
result = MagicMock(name='mock_connection.ops.compiler()')
# noinspection PyProtectedMember
result.execute_sql.side_effect = NotSupportedError(
"Mock database tried to execute SQL for {} model.".format(
queryset.model._meta.object_name))
result.has_results.side_effect = result.execute_sql.side_effect
return result
mock_ops.compiler.return_value.side_effect = compiler
mock_ops.integer_field_range.return_value = (-sys.maxsize - 1, sys.maxsize)
mock_ops.max_name_length.return_value = sys.maxsize
Model.refresh_from_db = Mock() # Make this into a noop.
示例9: test_mock_sql_raises_error
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_mock_sql_raises_error(self):
""" Get a clear error if you forget to mock a database query. """
with self.assertRaisesRegexp(
NotSupportedError,
"Mock database tried to execute SQL for Car model."):
Car.objects.count()
示例10: test_exists_raises_error
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_exists_raises_error(self):
""" Get a clear error if you forget to mock a database query. """
with self.assertRaisesRegexp(
NotSupportedError,
"Mock database tried to execute SQL for Car model."):
Car.objects.exists()
示例11: test_not_mocked
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def test_not_mocked(self):
car = Car(id=99)
with self.assertRaises(NotSupportedError):
car.sedan
示例12: supports_stddev
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def supports_stddev(self):
"""Confirm support for STDDEV and related stats functions."""
try:
self.connection.ops.check_expression_support(StdDev(1))
except NotSupportedError:
return False
return True
示例13: __enter__
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def __enter__(self):
# Some SQLite schema alterations need foreign key constraints to be
# disabled. Enforce it here for the duration of the schema edition.
if not self.connection.disable_constraint_checking():
raise NotSupportedError(
'SQLite schema editor cannot be used while foreign key '
'constraint checks are enabled. Make sure to disable them '
'before entering a transaction.atomic() context because '
'SQLite3 does not support disabling them in the middle of '
'a multi-statement transaction.'
)
self.connection.cursor().execute('PRAGMA legacy_alter_table = ON')
return super().__enter__()
示例14: alter_db_table
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def alter_db_table(self, model, old_db_table, new_db_table, disable_constraints=True):
if disable_constraints and self._is_referenced_by_fk_constraint(old_db_table):
if self.connection.in_atomic_block:
raise NotSupportedError((
'Renaming the %r table while in a transaction is not '
'supported on SQLite because it would break referential '
'integrity. Try adding `atomic = False` to the Migration class.'
) % old_db_table)
self.connection.enable_constraint_checking()
super().alter_db_table(model, old_db_table, new_db_table)
self.connection.disable_constraint_checking()
else:
super().alter_db_table(model, old_db_table, new_db_table)
示例15: alter_field
# 需要导入模块: from django.db import utils [as 别名]
# 或者: from django.db.utils import NotSupportedError [as 别名]
def alter_field(self, model, old_field, new_field, strict=False):
old_field_name = old_field.name
table_name = model._meta.db_table
_, old_column_name = old_field.get_attname_column()
if (new_field.name != old_field_name and
self._is_referenced_by_fk_constraint(table_name, old_column_name, ignore_self=True)):
if self.connection.in_atomic_block:
raise NotSupportedError((
'Renaming the %r.%r column while in a transaction is not '
'supported on SQLite because it would break referential '
'integrity. Try adding `atomic = False` to the Migration class.'
) % (model._meta.db_table, old_field_name))
with atomic(self.connection.alias):
super().alter_field(model, old_field, new_field, strict=strict)
# Follow SQLite's documented procedure for performing changes
# that don't affect the on-disk content.
# https://sqlite.org/lang_altertable.html#otheralter
with self.connection.cursor() as cursor:
schema_version = cursor.execute('PRAGMA schema_version').fetchone()[0]
cursor.execute('PRAGMA writable_schema = 1')
references_template = ' REFERENCES "%s" ("%%s") ' % table_name
new_column_name = new_field.get_attname_column()[1]
search = references_template % old_column_name
replacement = references_template % new_column_name
cursor.execute('UPDATE sqlite_master SET sql = replace(sql, %s, %s)', (search, replacement))
cursor.execute('PRAGMA schema_version = %d' % (schema_version + 1))
cursor.execute('PRAGMA writable_schema = 0')
# The integrity check will raise an exception and rollback
# the transaction if the sqlite_master updates corrupt the
# database.
cursor.execute('PRAGMA integrity_check')
# Perform a VACUUM to refresh the database representation from
# the sqlite_master table.
with self.connection.cursor() as cursor:
cursor.execute('VACUUM')
else:
super().alter_field(model, old_field, new_field, strict=strict)