本文整理汇总了Python中sqlalchemy.test.schema.Table.exists方法的典型用法代码示例。如果您正苦于以下问题：Python Table.exists方法的具体用法？Python Table.exists怎么用？Python Table.exists使用的例子？那么恭喜您, 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sqlalchemy.test.schema.Table的用法示例。
在下文中一共展示了Table.exists方法的3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: test_create_drop_bound
# 需要导入模块: from sqlalchemy.test.schema import Table [as 别名]
# 或者: from sqlalchemy.test.schema.Table import exists [as 别名]
def test_create_drop_bound(self):
for meta in (MetaData, ThreadLocalMetaData):
for bind in (testing.db, testing.db.connect()):
metadata = meta()
table = Table("test_table", metadata, Column("foo", Integer))
metadata.bind = bind
assert metadata.bind is table.bind is bind
metadata.create_all()
assert table.exists()
metadata.drop_all()
table.create()
table.drop()
assert not table.exists()
metadata = meta()
table = Table("test_table", metadata, Column("foo", Integer))
metadata.bind = bind
assert metadata.bind is table.bind is bind
metadata.create_all()
assert table.exists()
metadata.drop_all()
table.create()
table.drop()
assert not table.exists()
if isinstance(bind, engine.Connection):
bind.close()示例2: test_create_drop_explicit
# 需要导入模块: from sqlalchemy.test.schema import Table [as 别名]
# 或者: from sqlalchemy.test.schema.Table import exists [as 别名]
def test_create_drop_explicit(self):
metadata = MetaData()
table = Table("test_table", metadata, Column("foo", Integer))
for bind in (testing.db, testing.db.connect()):
for args in [([], {"bind": bind}), ([bind], {})]:
metadata.create_all(*args[0], **args[1])
assert table.exists(*args[0], **args[1])
metadata.drop_all(*args[0], **args[1])
table.create(*args[0], **args[1])
table.drop(*args[0], **args[1])
assert not table.exists(*args[0], **args[1])示例3: test_create_drop_constructor_bound
# 需要导入模块: from sqlalchemy.test.schema import Table [as 别名]
# 或者: from sqlalchemy.test.schema.Table import exists [as 别名]
def test_create_drop_constructor_bound(self):
for bind in (testing.db, testing.db.connect()):
try:
for args in (([bind], {}), ([], {"bind": bind})):
metadata = MetaData(*args[0], **args[1])
table = Table("test_table", metadata, Column("foo", Integer))
assert metadata.bind is table.bind is bind
metadata.create_all()
assert table.exists()
metadata.drop_all()
table.create()
table.drop()
assert not table.exists()
finally:
if isinstance(bind, engine.Connection):
bind.close()