o RcP@sdZddlmZddlmZddlmZddlmZeefZ Gdddej Z e Z Gdd d ej Z Gd d d ejZGd d d ej ZGdddej ZGdddeZGdddeZGdddejZGdddejZGdddejZddZedddZdS) zSQLAlchemy ORM exceptions.)exc)util)MultipleResultsFound) NoResultFoundc@eZdZdZdS)StaleDataErroraaAn operation encountered database state that is unaccounted for. Conditions which cause this to happen include: * A flush may have attempted to update or delete rows and an unexpected number of rows were matched during the UPDATE or DELETE statement. Note that when version_id_col is used, rows in UPDATE or DELETE statements are also matched against the current known version identifier. * A mapped object with version_id_col was refreshed, and the version number coming back from the database does not match that of the object itself. * A object is detached from its parent object, however the object was previously attached to a different parent identity which was garbage collected, and a decision cannot be made if the new parent was really the most recent "parent". N__name__ __module__ __qualname____doc__r r 4D:\Flask\env\Lib\site-packages\sqlalchemy/orm/exc.pyrrc@r) FlushErrorz0A invalid condition was detected during flush().Nrr r r rr/rrc@r) UnmappedErrorz?Base for exceptions that involve expected mappings not present.Nrr r r rr3rrc@r)ObjectDereferencedErrorzPAn operation cannot complete due to an object being garbage collected. Nrr r r rr7rrc@seZdZdZdZdS)DetachedInstanceErrorzSAn attempt to access unloaded attributes on a mapped instance that is detached.Zbhk3N)r r r r coder r r rr>src@,eZdZdZeddddZddZdS) UnmappedInstanceErrorz;An mapping operation was requested for an unknown instance.sqlalchemy.orm.baseNcCstjj}|s8z|t|tt|}d||f}Wnty7tt|}t|tr5|dt|7}Ynwt ||dS)NzClass %r is mapped, but this instance lacks instrumentation. This occurs when the instance is created before sqlalchemy.orm.mapper(%s) was called.z;; was a class (%s) supplied where an instance was required?) r preloadedorm_baseZ class_mappertype_safe_cls_nameUnmappedClassError_default_unmapped isinstancer__init__)selfobjmsgbasenamer r rrHs(    zUnmappedInstanceError.__init__cC|jd|jdffSN __class__argsr r r r __reduce___z UnmappedInstanceError.__reduce__Nr r r r rpreload_modulerr,r r r rrEs   rc@s"eZdZdZdddZddZdS)rz8An mapping operation was requested for an unknown class.NcCs|st|}t||dSr.)rrr)r clsr"r r rrfszUnmappedClassError.__init__cCr%r&r(r+r r rr,kr-zUnmappedClassError.__reduce__r.)r r r r rr,r r r rrcs  rc@r) ObjectDeletedErroraA refresh operation failed to retrieve the database row corresponding to an object's known primary key identity. A refresh operation proceeds when an expired attribute is accessed on an object, or when :meth:`_query.Query.get` is used to retrieve an object which is, upon retrieval, detected as expired. A SELECT is emitted for the target row based on primary key; if no row is returned, this exception is raised. The true meaning of this exception is simply that no row exists for the primary key identifier associated with a persistent object. The row may have been deleted, or in some cases the primary key updated to a new value, outside of the ORM's management of the target object. rNcCs,tjj}|s d||}tj||dS)NzDInstance '%s' has been deleted, or its row is otherwise not present.)rrr state_strsa_excInvalidRequestErrorr)r stater"r#r r rrszObjectDeletedError.__init__cCr%r&r(r+r r rr,r-zObjectDeletedError.__reduce__r.r/r r r rr2os   r2c@r)UnmappedColumnErrorz5Mapping operation was requested on an unknown column.Nrr r r rr7rr7c@seZdZdZddZdS)LoaderStrategyExceptionz2A loader strategy for an attribute does not exist.c CsR|durtj|d||fdStj|dt||t|t|fdS)NzCan't find strategy %s for %szuCan't apply "%s" strategy to property "%s", which is a "%s"; this loader strategy is intended to be used with a "%s".)r4r5rrZclsname_as_plain_name)r Zapplied_to_property_typeZrequesting_propertyZ applies_toZactual_strategy_typeZ strategy_keyr r rrs"z LoaderStrategyException.__init__N)r r r r rr r r rr8s r8cCsPz d|j|jf}W|Sty't|dd}|dur$t|}Y|SY|Sw)N.r )joinr r AttributeErrorgetattrrepr)r1cls_namer r rrs  rrc CsNtjj}z||j}Wntftyi}Ynwt|}|s%d|SdS)NzClass '%s' is not mapped)rrrZmanager_of_classmappers TypeErrorNO_STATEr)r1r#r?r$r r rrsrN)r rr4rrrr;KeyErrorrAZSQLAlchemyErrorrZConcurrentModificationErrorrr5rrrrrr2r7r8rr0rr r r rs*     $