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Edit File: base.pyc
� 1��fc @ s} d Z d d l Z d d l m Z d d l m Z d d l m Z d d l m Z e j d d � Z e j d d � Z e j d d � Z e j d d � Z e j d d � Z e Z e j d d d d �Z e j d d d d �Z e j d d d d �Z e j d d d d �Z e j d d d d �Z e j d d! d d" �Z e j d# d$ d d% �Z e j d& d' d d( �Z e j d) d* d d+ �Z e j d, d- d d. �Z e j d/ d0 d e e Be Be Be B�Z e j d1 d2 d e e A�Z e j d3 d4 d e e A�Z e j d5 d6 d e e A�Z e j d7 d8 d e e A�Z e j d9 d: d e e A�Z e j d; d< d e e B�Z d= Z d> Z e j d? � Z! e j d@ � Z" e j dA � Z# e j dB dC � Z$ e j dD dE � Z% e j dF dG � Z& e j dH dI � Z' e( e g � Z) e( d e e g � Z+ e j dJ � Z, e j dK � Z- e j dL � Z. dM � Z/ dN � Z0 e j1 e � Z2 e j1 dO � Z3 dP � Z4 dQ � Z5 dR � Z6 dS � Z7 dT � Z8 dU � Z9 dV � Z: e j; e< � dW � � Z= dX � Z> dY � Z? dZ � Z@ d[ � ZA d\ � ZB d] � ZC e jD d^ � ZE e j; eF � eG d_ � � ZH eI d` � ZJ da e< f db � � YZK dc eK f dd � � YZL de e< f df � � YZM d S(g s= Constants and rudimental functions used throughout the ORM. i����Ni ( t exci ( t inspection( t utilt PASSIVE_NO_RESULTs� Symbol returned by a loader callable or other attribute/history retrieval operation when a value could not be determined, based on loader callable flags. t PASSIVE_CLASS_MISMATCHs� Symbol indicating that an object is locally present for a given primary key identity but it is not of the requested class. The return value is therefore None and no SQL should be emitted.t ATTR_WAS_SETs� Symbol returned by a loader callable to indicate the retrieved value, or values, were assigned to their attributes on the target object. t ATTR_EMPTYs@ Symbol used internally to indicate an attribute had no callable.t NO_VALUEs� Symbol which may be placed as the 'previous' value of an attribute, indicating no value was loaded for an attribute when it was modified, and flags indicated we were not to load it. t NO_CHANGEs] No callables or SQL should be emitted on attribute access and no state should change t canonicali t CALLABLES_OKsE Loader callables can be fired off if a value is not present. t SQL_OKsB Loader callables can emit SQL at least on scalar value attributes.t RELATED_OBJECT_OKsZ Callables can use SQL to load related objects as well as scalar value attributes. i t INIT_OKs� Attributes should be initialized with a blank value (None or an empty collection) upon get, if no other value can be obtained. i t NON_PERSISTENT_OKs9 Callables can be emitted if the parent is not persistent.i t LOAD_AGAINST_COMMITTEDsU Callables should use committed values as primary/foreign keys during a load. i t NO_AUTOFLUSHs* Loader callables should disable autoflush.i@ t NO_RAISEs0 Loader callables should not raise any assertionsi� t DEFERRED_HISTORY_LOADs< indicates special load of the previous value of an attributei t PASSIVE_OFFs& Callables can be emitted in all cases.t PASSIVE_RETURN_NO_VALUEs PASSIVE_OFF ^ INIT_OKt PASSIVE_NO_INITIALIZEs& PASSIVE_RETURN_NO_VALUE ^ CALLABLES_OKt PASSIVE_NO_FETCHs PASSIVE_OFF ^ SQL_OKt PASSIVE_NO_FETCH_RELATEDs PASSIVE_OFF ^ RELATED_OBJECT_OKt PASSIVE_ONLY_PERSISTENTs PASSIVE_OFF ^ NON_PERSISTENT_OKs PASSIVE_OFF | NO_RAISEs> Symbol used specifically for session.merge() and similar casest _sa_class_managert _sa_instance_statet EXT_CONTINUEt EXT_STOPt EXT_SKIPt ONETOMANYs� Indicates the one-to-many direction for a :func:`_orm.relationship`. This symbol is typically used by the internals but may be exposed within certain API features. t MANYTOONEs� Indicates the many-to-one direction for a :func:`_orm.relationship`. This symbol is typically used by the internals but may be exposed within certain API features. t MANYTOMANYs� Indicates the many-to-many direction for a :func:`_orm.relationship`. This symbol is typically used by the internals but may be exposed within certain API features. t NOT_EXTENSIONs� Symbol indicating an :class:`InspectionAttr` that's not part of sqlalchemy.ext. Is assigned to the :attr:`.InspectionAttr.extension_type` attribute. t SET_DEFERRED_EXPIREDt DEFER_FOR_STATEt RAISE_FOR_STATEc s t j � f d � � } | S( Nc sC | d } x � D] } | | | j � q W| | | d | � d S( Ni i ( t __name__( t fnt argst kwt selft assertion( t assertions( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt generate� s ( R t decorator( R+ R, ( ( R+ sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _assertions� s c C s | j j t d � S( N( t __dict__t gett DEFAULT_MANAGER_ATTRt None( t cls( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt manager_of_class� s R/ c C s t t | � � S( s' Return a string describing an instance.( t state_strt instance_state( t instance( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt instance_str� s c C s4 | d k r d Sd | j j t | j � � f Sd S( s= Return a string describing an instance via its InstanceState.R2 s <%s at 0x%x>N( R2 t class_R% t idt obj( t state( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyR5 s c C s% | d k r d Sd | j j f Sd S( sN Return a string describing an instance's class via its InstanceState. R2 s <%s>N( R2 R9 R% ( R< ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt state_class_str s c C s t | � d | S( Nt .( R8 ( R7 t attribute( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt attribute_str s c C s t | � d | S( NR> ( R5 ( R< R? ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt state_attribute_str s c C s t | � j S( s� Given an object, return the primary Mapper associated with the object instance. Raises :class:`sqlalchemy.orm.exc.UnmappedInstanceError` if no mapping is configured. This function is available via the inspection system as:: inspect(instance).mapper Using the inspection system will raise :class:`sqlalchemy.exc.NoInspectionAvailable` if the instance is not part of a mapping. ( t object_statet mapper( R7 ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt object_mapper s c C s2 t | � } | d k r* t j | � � n | Sd S( s� Given an object, return the :class:`.InstanceState` associated with the object. Raises :class:`sqlalchemy.orm.exc.UnmappedInstanceError` if no mapping is configured. Equivalent functionality is available via the :func:`_sa.inspect` function as:: inspect(instance) Using the inspection system will raise :class:`sqlalchemy.exc.NoInspectionAvailable` if the instance is not part of a mapping. N( t _inspect_mapped_objectR2 R t UnmappedInstanceError( R7 R< ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyRB 1 s c C s4 y t | � SWn t j f t j k r/ d SXd S( N( R6 R t UnmappedClassErrort NO_STATER2 ( R7 ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyRE I s c C s8 t j | t � } | d k r% | j St j | � � d S( N( R t inspectt FalseR2 RC R RG ( t class_or_mappert insp( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _class_to_mapperQ s c C s- t j | t � } | d k r% | j Sd Sd S( s` Return the :class:`_orm.Mapper` for the given class or None if the class is not mapped. N( R RI RJ R2 RC ( t entityRL ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _mapper_or_noneY s c C s8 t j | t � } | d k o7 | j o7 | j p7 | j S( sl Return True if the given object is a mapped class, :class:`_orm.Mapper`, or :class:`.AliasedClass`. N( R RI RJ R2 t is_clause_elementt is_mappert is_aliased_class( RN RL ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _is_mapped_classe s c C s[ t j | t � } t | d � rP t | j d � rP g | j j D] } | ^ q@ S| g Sd S( Nt selectablet c( R RI RJ t hasattrRT RU ( RN RL RU ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _orm_columnsr s ! c C s. t j | t � } | d k o- t | d t � S( NRR ( R RI RJ R2 t getattr( RN RL ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _is_aliased_classz s c C s� t j | � } | j r* | } | j } nC | j rE | j } | } n( t | d � rg | j j } } n | } y t | | � SWn9 t k r� } t j t j d | | f � d | �n Xd S( s� Return a class attribute given an entity and string name. May return :class:`.InstrumentedAttribute` or user-defined attribute. RC s Entity '%s' has no property '%s't replace_contextN( R RI t is_selectableRU RR RN RV RC R9 RX t AttributeErrorR t raise_t sa_exct InvalidRequestError( RN t keyRL t descriptiont err( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _entity_descriptor s" s manager.mapperc C sY y& t | � } | j s d S| j } Wn t j k r= d SX| rQ | j � n | Sd S( N( R4 t is_mappedR2 RC R RH t _check_configure( R9 t configuret class_managerRC ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt _inspect_mapped_class� s c C s` t | d | �} | d k rX t | t � sF t j d | f � � n t j | � � n | Sd S( s� Given a class, return the primary :class:`_orm.Mapper` associated with the key. Raises :exc:`.UnmappedClassError` if no mapping is configured on the given class, or :exc:`.ArgumentError` if a non-class object is passed. Equivalent functionality is available via the :func:`_sa.inspect` function as:: inspect(some_mapped_class) Using the inspection system will raise :class:`sqlalchemy.exc.NoInspectionAvailable` if the class is not mapped. Rf s Class object expected, got '%r'.N( Rh R2 t isinstancet typeR^ t ArgumentErrorR RG ( R9 Rf RC ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt class_mapper� s t InspectionAttrc B sP e Z d Z d Z e Z e Z e Z e Z e Z e Z e Z e Z e Z e Z RS( s# A base class applied to all ORM objects that can be returned by the :func:`_sa.inspect` function. The attributes defined here allow the usage of simple boolean checks to test basic facts about the object returned. While the boolean checks here are basically the same as using the Python isinstance() function, the flags here can be used without the need to import all of these classes, and also such that the SQLAlchemy class system can change while leaving the flags here intact for forwards-compatibility. ( ( R% t __module__t __doc__t __slots__RJ R[ RR t is_instanceRQ t is_bundlet is_propertyt is_attributet _is_internal_proxyRP R! t extension_type( ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyRm � s t InspectionAttrInfoc B s e Z d Z e j d � � Z RS( s Adds the ``.info`` attribute to :class:`.InspectionAttr`. The rationale for :class:`.InspectionAttr` vs. :class:`.InspectionAttrInfo` is that the former is compatible as a mixin for classes that specify ``__slots__``; this is essentially an implementation artifact. c C s i S( s� Info dictionary associated with the object, allowing user-defined data to be associated with this :class:`.InspectionAttr`. The dictionary is generated when first accessed. Alternatively, it can be specified as a constructor argument to the :func:`.column_property`, :func:`_orm.relationship`, or :func:`.composite` functions. .. versionchanged:: 1.0.0 :attr:`.MapperProperty.info` is also available on extension types via the :attr:`.InspectionAttrInfo.info` attribute, so that it can apply to a wider variety of ORM and extension constructs. .. seealso:: :attr:`.QueryableAttribute.info` :attr:`.SchemaItem.info` ( ( R) ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt info" s ( R% Rn Ro R t memoized_propertyRx ( ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyRw s t _MappedAttributec B s e Z d Z d Z RS( sV Mixin for attributes which should be replaced by mapper-assigned attributes. ( ( R% Rn Ro Rp ( ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyRz < s (N Ro t operatort R R^ R R t symbolR R R R R t NEVER_SETR R R R R R R R R R R R R R R R t PASSIVE_MERGER1 t DEFAULT_STATE_ATTRR R R R R R R! t frozensett _never_setR2 t _none_sett _SET_DEFERRED_EXPIREDt _DEFER_FOR_STATEt _RAISE_FOR_STATER. R4 t attrgetterR6 t instance_dictR8 R5 R= R@ RA RD RB t _inspectst objectRE RM RO RS RW RY Rc t dottedgettert _state_mapperRj RJ Rh t TrueRl Rm Rw Rz ( ( ( sF /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/base.pyt <module> s N#