Current File : //opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyc
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i ( t EXT_CONTINUEi ( t event( t utils sqlalchemy.orm.interfacest MapperExtensionc B s� e Z d Z e d � � Z e d � � Z e d � � Z d � Z d � Z d � Z d � Z
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.. deprecated:: 0.7
:class:`.MapperExtension` is deprecated and will be removed in a future
release. Please refer to :func:`.event.listen` in conjunction with
the :class:`.MapperEvents` listener interface.
New extension classes subclass :class:`.MapperExtension` and are specified
using the ``extension`` mapper() argument, which is a single
:class:`.MapperExtension` or a list of such::
from sqlalchemy.orm.interfaces import MapperExtension
class MyExtension(MapperExtension):
def before_insert(self, mapper, connection, instance):
print "instance %s before insert !" % instance
m = mapper(User, users_table, extension=MyExtension())
A single mapper can maintain a chain of ``MapperExtension``
objects. When a particular mapping event occurs, the
corresponding method on each ``MapperExtension`` is invoked
serially, and each method has the ability to halt the chain
from proceeding further::
m = mapper(User, users_table, extension=[ext1, ext2, ext3])
Each ``MapperExtension`` method returns the symbol
EXT_CONTINUE by default. This symbol generally means "move
to the next ``MapperExtension`` for processing". For methods
that return objects like translated rows or new object
instances, EXT_CONTINUE means the result of the method
should be ignored. In some cases it's required for a
default mapper activity to be performed, such as adding a
new instance to a result list.
The symbol EXT_STOP has significance within a chain
of ``MapperExtension`` objects that the chain will be stopped
when this symbol is returned. Like EXT_CONTINUE, it also
has additional significance in some cases that a default
mapper activity will not be performed.
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t getattrR R t methods_equivalentt warn_deprecatedR t listenR t Falset True( R R R t methodst metht me_methR R ( ( R sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR R sL
c C s t S( s Receive a class when the mapper is first constructed, and has
applied instrumentation to the mapped class.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R t mapperR ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR � s c C s t S( st Receive an instance when its constructor is called.
This method is only called during a userland construction of
an object. It is not called when an object is loaded from the
database.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R t oldinitR R R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR
� s c C s t S( s� Receive an instance when its constructor has been called,
and raised an exception.
This method is only called during a userland construction of
an object. It is not called when an object is loaded from the
database.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R R/ R R R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR � s c C s t S( s� Receive an object instance after it has been created via
``__new__``, and after initial attribute population has
occurred.
This typically occurs when the instance is created based on
incoming result rows, and is only called once for that
instance's lifetime.
Note that during a result-row load, this method is called upon
the first row received for this instance. Note that some
attributes and collections may or may not be loaded or even
initialized, depending on what's present in the result rows.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR � s c C s t S( s� Receive an object instance before that instance is inserted
into its table.
This is a good place to set up primary key values and such
that aren't handled otherwise.
Column-based attributes can be modified within this method
which will result in the new value being inserted. However
*no* changes to the overall flush plan can be made, and
manipulation of the ``Session`` will not have the desired effect.
To manipulate the ``Session`` within an extension, use
``SessionExtension``.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. t
connectionR ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR
� s c C s t S( s� Receive an object instance after that instance is inserted.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R0 R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR � s c C s t S( s� Receive an object instance before that instance is updated.
Note that this method is called for all instances that are marked as
"dirty", even those which have no net changes to their column-based
attributes. An object is marked as dirty when any of its column-based
attributes have a "set attribute" operation called or when any of its
collections are modified. If, at update time, no column-based
attributes have any net changes, no UPDATE statement will be issued.
This means that an instance being sent to before_update is *not* a
guarantee that an UPDATE statement will be issued (although you can
affect the outcome here).
To detect if the column-based attributes on the object have net
changes, and will therefore generate an UPDATE statement, use
``object_session(instance).is_modified(instance,
include_collections=False)``.
Column-based attributes can be modified within this method
which will result in the new value being updated. However
*no* changes to the overall flush plan can be made, and
manipulation of the ``Session`` will not have the desired effect.
To manipulate the ``Session`` within an extension, use
``SessionExtension``.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R0 R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR s c C s t S( s� Receive an object instance after that instance is updated.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R0 R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR s c C s t S( s� Receive an object instance before that instance is deleted.
Note that *no* changes to the overall flush plan can be made
here; and manipulation of the ``Session`` will not have the
desired effect. To manipulate the ``Session`` within an
extension, use ``SessionExtension``.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R0 R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR * s
c C s t S( s� Receive an object instance after that instance is deleted.
The return value is only significant within the ``MapperExtension``
chain; the parent mapper's behavior isn't modified by this method.
( R ( R R. R0 R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR 9 s ( t __name__t
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t SessionExtensionc B sw e Z d Z e d � � Z d � Z d � Z d � Z d � Z d � Z d � Z
d � Z d � Z d
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d � Z RS( s Base implementation for :class:`.Session` event hooks.
.. deprecated:: 0.7
:class:`.SessionExtension` is deprecated and will be removed in a future
release. Please refer to :func:`.event.listen` in conjunction with
the :class:`.SessionEvents` listener interface.
Subclasses may be installed into a :class:`.Session` (or
:class:`.sessionmaker`) using the ``extension`` keyword
argument::
from sqlalchemy.orm.interfaces import SessionExtension
class MySessionExtension(SessionExtension):
def before_commit(self, session):
print "before commit!"
Session = sessionmaker(extension=MySessionExtension())
The same :class:`.SessionExtension` instance can be used
with any number of sessions.
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before_committ after_committ after_rollbackt before_flusht after_flusht after_flush_postexect after_begint after_attacht after_bulk_updatet after_bulk_deletes� SessionExtension.%s is deprecated. The SessionExtension class will be removed in a future release. Please transition to the @event interface, using @event.listens_for(Session, '%s').( R% R5 R R& R' R R( ( R R R R, R- R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR ` s$
c C s d S( s� Execute right before commit is called.
Note that this may not be per-flush if a longer running
transaction is ongoing.N( ( R t session( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR6 { t c C s d S( s� Execute after a commit has occurred.
Note that this may not be per-flush if a longer running
transaction is ongoing.N( ( R R@ ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR7 � RA c C s d S( s� Execute after a rollback has occurred.
Note that this may not be per-flush if a longer running
transaction is ongoing.N( ( R R@ ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR8 � RA c C s d S( s� Execute before flush process has started.
`instances` is an optional list of objects which were passed to
the ``flush()`` method. N( ( R R@ t
flush_contextt instances( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR9 � RA c C s d S( s Execute after flush has completed, but before commit has been
called.
Note that the session's state is still in pre-flush, i.e. 'new',
'dirty', and 'deleted' lists still show pre-flush state as well
as the history settings on instance attributes.N( ( R R@ RB ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR: � RA c C s d S( sc Execute after flush has completed, and after the post-exec
state occurs.
This will be when the 'new', 'dirty', and 'deleted' lists are in
their final state. An actual commit() may or may not have
occurred, depending on whether or not the flush started its own
transaction or participated in a larger transaction. N( ( R R@ RB ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR; � RA c C s d S( s� Execute after a transaction is begun on a connection
`transaction` is the SessionTransaction. This method is called
after an engine level transaction is begun on a connection. N( ( R R@ t transactionR0 ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR< � RA c C s d S( sk Execute after an instance is attached to a session.
This is called after an add, delete or merge. N( ( R R@ R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR= � RA c C s d S( sG Execute after a bulk update operation to the session.
This is called after a session.query(...).update()
`query` is the query object that this update operation was
called on. `query_context` was the query context object.
`result` is the result object returned from the bulk operation.
N( ( R R@ t queryt
query_contextt result( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR> � RA c C s d S( sG Execute after a bulk delete operation to the session.
This is called after a session.query(...).delete()
`query` is the query object that this delete operation was
called on. `query_context` was the query context object.
`result` is the result object returned from the bulk operation.
N( ( R R@ RE RF RG ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR? � RA ( R1 R2 R3 R4 R R6 R7 R8 R9 R: R; R< R= R> R? ( ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR5 D s
t AttributeExtensionc B s> e Z d Z e Z e d � � Z d � Z d � Z d � Z RS( s� Base implementation for :class:`.AttributeImpl` event hooks, events
that fire upon attribute mutations in user code.
.. deprecated:: 0.7
:class:`.AttributeExtension` is deprecated and will be removed in a
future release. Please refer to :func:`.event.listen` in conjunction
with the :class:`.AttributeEvents` listener interface.
:class:`.AttributeExtension` is used to listen for set,
remove, and append events on individual mapped attributes.
It is established on an individual mapped attribute using
the `extension` argument, available on
:func:`.column_property`, :func:`.relationship`, and
others::
from sqlalchemy.orm.interfaces import AttributeExtension
from sqlalchemy.orm import mapper, relationship, column_property
class MyAttrExt(AttributeExtension):
def append(self, state, value, initiator):
print "append event !"
return value
def set(self, state, value, oldvalue, initiator):
print "set event !"
return value
mapper(SomeClass, sometable, properties={
'foo':column_property(sometable.c.foo, extension=MyAttrExt()),
'bar':relationship(Bar, extension=MyAttrExt())
})
Note that the :class:`.AttributeExtension` methods
:meth:`~.AttributeExtension.append` and
:meth:`~.AttributeExtension.set` need to return the
``value`` parameter. The returned value is used as the
effective value, and allows the extension to change what is
ultimately persisted.
AttributeExtension is assembled within the descriptors associated
with a mapped class.
c
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d | j d t d t �t j | d | j d | j d t d t �d S( Nt appendt removet sets� AttributeExtension.%s is deprecated. The AttributeExtension class will be removed in a future release. Please transition to the @event interface, using @event.listens_for(Class.attribute, '%s').t active_historyR R$ ( R% RH R R& R' R R( RI RL R* RJ RK ( R R R R, R- R ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyR � s8 c C s | S( s� Receive a collection append event.
The returned value will be used as the actual value to be
appended.
( ( R t statet valuet initiator( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyRI $ s c C s d S( sF Receive a remove event.
No return value is defined.
N( ( R RM RN RO ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyRJ - s c C s | S( sn Receive a set event.
The returned value will be used as the actual value to be
set.
( ( R RM RN t oldvalueRO ( ( sW /opt/alt/python27/lib64/python2.7/site-packages/sqlalchemy/orm/deprecated_interfaces.pyRK 5 s (
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