o
    i                     @   s   d dl mZ d dl mZ d dlmZ ddl mZ ddlmZ ddlm	Z	 ddlm
Z
 dgZG d	d deZeZ	 d
d ZejD ]
Zeeeee q?dd ZdD ]
Zeeeee qPdd ZdD ]
Zeeeee qadS )   )class_mapper)exc)Session   )ScopedRegistry)ThreadLocalRegistry)warnscoped_sessionc                   @   sB   e Zd ZdZdZ	 dddZdd Zdd Zd	d
 ZdddZ	dS )r	   ztProvides scoped management of :class:`.Session` objects.

    See :ref:`unitofwork_contextual` for a tutorial.

    Nc                 C   s(   || _ |rt||| _dS t|| _dS )a  Construct a new :class:`.scoped_session`.

        :param session_factory: a factory to create new :class:`.Session`
         instances. This is usually, but not necessarily, an instance
         of :class:`.sessionmaker`.
        :param scopefunc: optional function which defines
         the current scope.   If not passed, the :class:`.scoped_session`
         object assumes "thread-local" scope, and will use
         a Python ``threading.local()`` in order to maintain the current
         :class:`.Session`.  If passed, the function should return
         a hashable token; this token will be used as the key in a
         dictionary in order to store and retrieve the current
         :class:`.Session`.

        N)session_factoryr   registryr   )selfr
   	scopefunc r   Q/var/www/edux/Edux_v2/venv/lib/python3.10/site-packages/sqlalchemy/orm/scoping.py__init__!   s   zscoped_session.__init__c                 K   s@   |r| j  rtd| jdi |}| j | |S |   S )a  Return the current :class:`.Session`, creating it
        using the :attr:`.scoped_session.session_factory` if not present.

        :param \**kw: Keyword arguments will be passed to the
         :attr:`.scoped_session.session_factory` callable, if an existing
         :class:`.Session` is not present.  If the :class:`.Session` is present
         and keyword arguments have been passed,
         :exc:`~sqlalchemy.exc.InvalidRequestError` is raised.

        zEScoped session is already present; no new arguments may be specified.Nr   )r   hassa_excInvalidRequestErrorr
   set)r   kwsessr   r   r   __call__8   s   
zscoped_session.__call__c                 C   s$   | j  r|     | j   dS )a  Dispose of the current :class:`.Session`, if present.

        This will first call :meth:`.Session.close` method
        on the current :class:`.Session`, which releases any existing
        transactional/connection resources still being held; transactions
        specifically are rolled back.  The :class:`.Session` is then
        discarded.   Upon next usage within the same scope,
        the :class:`.scoped_session` will produce a new
        :class:`.Session` object.

        N)r   r   closeclearr   r   r   r   removeP   s   
zscoped_session.removec                 K   s(   | j  r	td | jjdi | dS )zreconfigure the :class:`.sessionmaker` used by this
        :class:`.scoped_session`.

        See :meth:`.sessionmaker.configure`.

        ztAt least one scoped session is already present.  configure() can not affect sessions that have already been created.Nr   )r   r   r   r
   	configure)r   kwargsr   r   r   r   a   s
   
zscoped_session.configurec                    s   G  fdddt }| S )a0  return a class property which produces a :class:`_query.Query`
        object
        against the class and the current :class:`.Session` when called.

        e.g.::

            Session = scoped_session(sessionmaker())

            class MyClass(object):
                query = Session.query_property()

            # after mappers are defined
            result = MyClass.query.filter(MyClass.name=='foo').all()

        Produces instances of the session's configured query class by
        default.  To override and use a custom implementation, provide
        a ``query_cls`` callable.  The callable will be invoked with
        the class's mapper as a positional argument and a session
        keyword argument.

        There is no limit to the number of query properties placed on
        a class.

        c                       s   e Zd Z fddZdS )z,scoped_session.query_property.<locals>.queryc                    sP   zt |}|r r | dW S  |W S W d S  tjy'   Y d S w )N)session)r   r   queryorm_excUnmappedClassError)sinstanceownermapper	query_clsr   r   r   __get__   s   z4scoped_session.query_property.<locals>.query.__get__N)__name__
__module____qualname__r(   r   r&   r   r   r      s    r   )object)r   r'   r   r   r&   r   query_propertyr   s   zscoped_session.query_propertyN)
r)   r*   r+   __doc__r
   r   r   r   r   r-   r   r   r   r   r	      s    
c                    s    fdd}|S )Nc                    s   t |   |i |S r.   getattrr   )r   argsr   namer   r   do   s   zinstrument.<locals>.dor   r4   r5   r   r3   r   
instrument   s   r7   c                    s"    fdd} fdd}t ||S )Nc                    s   t |   | d S r.   )setattrr   )r   attrr3   r   r   set_      zmakeprop.<locals>.set_c                    s   t |   S r.   r0   r   r3   r   r   get   s   zmakeprop.<locals>.get)property)r4   r:   r<   r   r3   r   makeprop   s   
r>   )
binddirtydeletednewidentity_map	is_active	autoflushno_autoflushinfo
autocommitc                    s    fdd}t |S )Nc                    s   t t |i |S r.   )r1   r   )clsr2   r   r3   r   r   r5      r;   zclslevel.<locals>.do)classmethodr6   r   r3   r   clslevel   s   rK   )	close_allobject_sessionidentity_keyN) r   r   r    r   r   r   utilr   r   r   __all__r,   r	   ScopedSessionr7   public_methodsmethr8   r>   proprK   r   r   r   r   <module>   s,    


