U Zj@ @spddlmZddlZddlZddlZddlZddlm Z ej rJddl m Z Gdddej jZdd d d ZdS) ) annotationsN)app_ctx) SQLAlchemycsFeZdZdZddddfdd Zdd d d dd d fd d ZZS)SessionaA SQLAlchemy :class:`~sqlalchemy.orm.Session` class that chooses what engine to use based on the bind key associated with the metadata associated with the thing being queried. To customize ``db.session``, subclass this and pass it as the ``class_`` key in the ``session_options`` to :class:`.SQLAlchemy`. .. versionchanged:: 3.0 Renamed from ``SignallingSession``. rzt.AnyNone)dbkwargsreturnc stjf|||_i|_dS)N)super__init___dbZ_model_changes)selfrr  __class__[/var/www/html/TRUCKING_PROJECT/venv/lib/python3.8/site-packages/flask_sqlalchemy/session.pyr szSession.__init__Nz t.Any | Nonez.sa.engine.Engine | sa.engine.Connection | Nonez'sa.engine.Engine | sa.engine.Connection)mapperclausebindr r c s|dk r |S|dk rlzt|}WnBtjjk rd}z t|trRtjj||W5d}~XYnX|j}|j j }t|tj rd|j j kr|j j d}||krtjd|d||Sd|kr|dStjf|||d|S)azSelect an engine based on the ``bind_key`` of the metadata associated with the model or table being queried. If no bind key is set, uses the default bind. .. versionchanged:: 3.0 The implementation more closely matches the base SQLAlchemy implementation. .. versionchanged:: 2.1 Support joining an external transaction. NZbind_keyz Bind key 'z&' is not in 'SQLALCHEMY_BINDS' config.)rrr)sainspectexcZNoInspectionAvailable isinstancetypeormZUnmappedClassErrorZpersist_selectabler enginesTablemetadatainfoZUnboundExecutionErrorr get_bind)rrrrr erkeyrrrr s*   zSession.get_bind)NNN)__name__ __module__ __qualname____doc__r r __classcell__rrrrrs  rint)r cCs ttS)zJGet the id of the current Flask application context for the session scope.)idrZ_get_current_objectrrrr _app_ctx_idOsr*) __future__rtypingtZ sqlalchemyrZsqlalchemy.excZsqlalchemy.ormZ flask.globalsr TYPE_CHECKING extensionrrrr*rrrrs   A