本文整理汇总了Python中sqlalchemy.ext.declarative.DeferredReflection.prepare方法的典型用法代码示例。如果您正苦于以下问题：Python DeferredReflection.prepare方法的具体用法？Python DeferredReflection.prepare怎么用？Python DeferredReflection.prepare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.ext.declarative.DeferredReflection的用法示例。
在下文中一共展示了DeferredReflection.prepare方法的4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: prepare
# 需要导入模块: from sqlalchemy.ext.declarative import DeferredReflection [as 别名]
# 或者: from sqlalchemy.ext.declarative.DeferredReflection import prepare [as 别名]
def prepare(cls, engine):
"""Reflect all :class:`.Table` objects for all current
:class:`.DeferredReflection` subclasses"""
to_map = _DeferredMapperConfig.classes_for_base(cls)
for thingy in to_map:
cls._sa_decl_prepare(thingy.local_table, engine)
thingy.map()
mapper = thingy.cls.__mapper__
metadata = mapper.class_.metadata
for rel in mapper._props.values():
if isinstance(rel, properties.RelationshipProperty) and \
rel.secondary is not None:
if isinstance(rel.secondary, Table):
cls._reflect_table(rel.secondary, engine)
elif isinstance(rel.secondary, _class_resolver):
rel.secondary._resolvers += (
cls._sa_deferred_table_resolver(engine, metadata),
) 示例2: prepare
# 需要导入模块: from sqlalchemy.ext.declarative import DeferredReflection [as 别名]
# 或者: from sqlalchemy.ext.declarative.DeferredReflection import prepare [as 别名]
def prepare(cls, engine):
"""Reflect all :class:`_schema.Table` objects for all current
:class:`.DeferredReflection` subclasses"""
to_map = _DeferredMapperConfig.classes_for_base(cls)
for thingy in to_map:
cls._sa_decl_prepare(thingy.local_table, engine)
thingy.map()
mapper = thingy.cls.__mapper__
metadata = mapper.class_.metadata
for rel in mapper._props.values():
if (
isinstance(rel, relationships.RelationshipProperty)
and rel.secondary is not None
):
if isinstance(rel.secondary, Table):
cls._reflect_table(rel.secondary, engine)
elif isinstance(rel.secondary, _class_resolver):
rel.secondary._resolvers += (
cls._sa_deferred_table_resolver(engine, metadata),
) 示例3: prepare
# 需要导入模块: from sqlalchemy.ext.declarative import DeferredReflection [as 别名]
# 或者: from sqlalchemy.ext.declarative.DeferredReflection import prepare [as 别名]
def prepare(cls, engine):
"""Reflect all :class:`.Table` objects for all current
:class:`.DeferredReflection` subclasses"""
to_map = _DeferredMapperConfig.classes_for_base(cls)
for thingy in to_map:
cls._sa_decl_prepare(thingy.local_table, engine)
thingy.map()
mapper = thingy.cls.__mapper__
metadata = mapper.class_.metadata
for rel in mapper._props.values():
if isinstance(rel, properties.RelationshipProperty) and \
rel.secondary is not None:
if isinstance(rel.secondary, Table):
cls._reflect_table(rel.secondary, engine)
elif isinstance(rel.secondary, _class_resolver):
rel.secondary._resolvers += (
cls._sa_deferred_table_resolver(engine, metadata),
) 示例4: _sa_raise_deferred_config
# 需要导入模块: from sqlalchemy.ext.declarative import DeferredReflection [as 别名]
# 或者: from sqlalchemy.ext.declarative.DeferredReflection import prepare [as 别名]
def _sa_raise_deferred_config(cls):
raise orm_exc.UnmappedClassError(
cls,
msg="Class %s is a subclass of DeferredReflection. "
"Mappings are not produced until the .prepare() "
"method is called on the class hierarchy."
% orm_exc._safe_cls_name(cls),
)