o `Zh@slddlZddlmZmZmZddlmZddlmZm Z m Z m Z ddl m Z ddlmZGdddeZdS) N) CreateError SessionBase UpdateError)SuspiciousOperation) DatabaseErrorIntegrityErrorrouter transaction)timezone)cached_propertycseZdZdZdfdd ZeddZeddZd d Z d d Z d dZ ddZ ddZ dddZdddZeddZZS) SessionStorez+ Implement database session store. Ncst|dSN)super__init__self session_key __class__Z/var/www/html/lang_env/lib/python3.10/site-packages/django/contrib/sessions/backends/db.pyrszSessionStore.__init__cCsddlm}|S)Nr)Session)Zdjango.contrib.sessions.modelsr)clsrrrrget_model_classs zSessionStore.get_model_classcCs|Sr )rrrrrmodelszSessionStore.modelc Cszz |jjj|jtdWS|jjtfy<}zt|tr.t d|j j }| t|d|_WYd}~dSd}~ww)N)rZexpire_date__gtzdjango.security.%s)robjectsgetrr now DoesNotExistr isinstancelogging getLoggerr__name__warningstr _session_key)reloggerrrr_get_session_from_dbs  z!SessionStore._get_session_from_dbcCs|}|r ||jSiSr )r)decode session_data)rsrrrload)szSessionStore.loadcCs|jjj|dSN)r)rrfilterexistsrrrrr0-szSessionStore.existscCs: ||_z|jddWn tyYqwd|_dS)NT) must_create)Z_get_new_session_keyr&savermodifiedrrrrcreate0s  zSessionStore.createcCs|j||||dS)z Return a new instance of the session model object, which represents the current session state. Intended to be used for saving the session data to the database. )rr+Z expire_date)rZ_get_or_create_session_keyencodeZget_expiry_date)rdatarrrcreate_model_instance=s z"SessionStore.create_model_instanceFcCs|jdur |S|j|d}||}tj|j|d}z$tj|d|j || |dWdWdS1s9wYWdSt yL|rKt t yW|sVt w)z Save the current session data to the database. If 'must_create' is True, raise a database error if the saving operation doesn't create a new entry (as opposed to possibly updating an existing entry). N)Zno_load)instance)using)Z force_insertZ force_updater9)rr4Z _get_sessionr7rZ db_for_writerr Zatomicr2rrrr)rr1r6objr9rrrr2Is(   &  zSessionStore.savecCsP|dur|jdur dS|j}z |jjj|dWdS|jjy'YdSwr.)rrrrdeleterrrrrr;bs zSessionStore.deletecCs|jjtddS)N)Zexpire_date__lt)rrr/r rr;)rrrr clear_expiredlszSessionStore.clear_expiredr )F)r# __module__ __qualname____doc__r classmethodrr rr)r-r0r4r7r2r;r< __classcell__rrrrr s      r )r!Z%django.contrib.sessions.backends.baserrrZdjango.core.exceptionsrZ django.dbrrrr Z django.utilsr Zdjango.utils.functionalr r rrrrs