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Functional constructs for ORM configuration.
See the SQLAlchemy object relational tutorial and mapper configuration
documentation for an overview of how this module is used.
iÿÿÿÿ( t exc( t Mappert _mapper_registryt class_mapper( t EXT_CONTINUEt EXT_STOPt ExtensionOptiont InstrumentationManagert MapperExtensiont PropComparatort SessionExtension( t AliasedClasst Validatort joint
object_mappert outerjoint polymorphic_uniont with_parent( t BackReft ColumnPropertyt ComparablePropertyt CompositePropertyt RelationPropertyt PropertyLoadert SynonymProperty( t mapper( t
reconstructort validates( t
strategies( t AliasOptiont Query( t util( t Session( t object_sessiont sessionmaker( t
ScopedSessionR R R R R R R t aliasedt backrefR t
clear_mapperst column_propertyt comparable_propertyt compile_mapperst compositet contains_aliast contains_eagert create_sessiont defert deferredt dynamic_loadert eagerloadt
eagerload_allt extensionR
t lazyloadR t noloadR R! R R R t relationt scoped_sessionR" t synonymt undefert
undefer_groupR c C s t | d | ƒS( s Provides thread-local management of Sessions.
This is a front-end function to
:class:`~sqlalchemy.orm.scoping.ScopedSession`.
:param session_factory: a callable function that produces
:class:`Session` instances, such as :func:`sessionmaker` or
:func:`create_session`.
:param scopefunc: optional, TODO
:returns: an :class:`~sqlalchemy.orm.scoping.ScopedSession` instance
Usage::
Session = scoped_session(sessionmaker(autoflush=True))
To instantiate a Session object which is part of the scoped context,
instantiate normally::
session = Session()
Most session methods are available as classmethods from the scoped
session::
Session.commit()
Session.close()
To map classes so that new instances are saved in the current Session
automatically, as well as to provide session-aware class attributes such
as "query", use the `mapper` classmethod from the scoped session::
mapper = Session.mapper
mapper(Class, table, ...)
t scopefunc( R# ( t session_factoryR; ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR7 g s %c K s d | j oB t i d ƒ d | j o t d ƒ ‚ n | i d ƒ | d >> from sqlalchemy.orm import create_session
>>> session = create_session()
It is recommended to use :func:`sessionmaker` instead of
create_session().
t
transactionals` The 'transactional' argument to sessionmaker() is deprecated; use autocommit=True|False instead.t
autocommits0 Specify autocommit *or* transactional, not both.t autoflusht expire_on_committ bind( t sa_utilt warn_deprecatedt TypeErrort popt
setdefaultt Falset Truet _Session( RA t kwargs( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR- Ž s
c K s t | d | | S( s, Provide a relationship of a primary Mapper to a secondary Mapper.
This corresponds to a parent-child or associative table relationship. The
constructed class is an instance of :class:`RelationProperty`.
A typical :func:`relation`::
mapper(Parent, properties={
'children': relation(Children)
})
:param argument:
a class or :class:`Mapper` instance, representing the target of
the relation.
:param secondary:
for a many-to-many relationship, specifies the intermediary
table. The *secondary* keyword argument should generally only
be used for a table that is not otherwise expressed in any class
mapping. In particular, using the Association Object Pattern is
generally mutually exclusive with the use of the *secondary*
keyword argument.
:param backref:
indicates the string name of a property to be placed on the related
mapper's class that will handle this relationship in the other
direction. The other property will be created automatically
when the mappers are configured. Can also be passed as a
:func:`backref` object to control the configuration of the
new relation.
:param back_populates:
Takes a string name and has the same meaning as ``backref``,
except the complementing property is **not** created automatically,
and instead must be configured explicitly on the other mapper. The
complementing property should also indicate ``back_populates``
to this relation to ensure proper functioning.
:param cascade:
a comma-separated list of cascade rules which determines how
Session operations should be "cascaded" from parent to child.
This defaults to ``False``, which means the default cascade
should be used. The default value is ``"save-update, merge"``.
Available cascades are:
``save-update`` - cascade the "add()" operation (formerly
known as save() and update())
``merge`` - cascade the "merge()" operation
``expunge`` - cascade the "expunge()" operation
``delete`` - cascade the "delete()" operation
``delete-orphan`` - if an item of the child's type with no
parent is detected, mark it for deletion. Note that this
option prevents a pending item of the child's class from being
persisted without a parent present.
``refresh-expire`` - cascade the expire() and refresh()
operations
``all`` - shorthand for "save-update,merge, refresh-expire,
expunge, delete"
:param collection_class:
a class or callable that returns a new list-holding object. will
be used in place of a plain list for storing elements.
:param comparator_factory:
a class which extends :class:`RelationProperty.Comparator` which
provides custom SQL clause generation for comparison operations.
:param extension:
an :class:`AttributeExtension` instance, or list of extensions,
which will be prepended to the list of attribute listeners for
the resulting descriptor placed on the class. These listeners
will receive append and set events before the operation
proceeds, and may be used to halt (via exception throw) or
change the value used in the operation.
:param foreign_keys:
a list of columns which are to be used as "foreign key" columns.
this parameter should be used in conjunction with explicit
``primaryjoin`` and ``secondaryjoin`` (if needed) arguments, and
the columns within the ``foreign_keys`` list should be present
within those join conditions. Normally, ``relation()`` will
inspect the columns within the join conditions to determine
which columns are the "foreign key" columns, based on
information in the ``Table`` metadata. Use this argument when no
ForeignKey's are present in the join condition, or to override
the table-defined foreign keys.
:param join_depth:
when non-``None``, an integer value indicating how many levels
deep eagerload joins should be constructed on a self-referring
or cyclical relationship. The number counts how many times the
same Mapper shall be present in the loading condition along a
particular join branch. When left at its default of ``None``,
eager loads will automatically stop chaining joins when they
encounter a mapper which is already higher up in the chain.
:param lazy=(True|False|None|'dynamic'):
specifies how the related items should be loaded. Values include:
True - items should be loaded lazily when the property is first
accessed.
False - items should be loaded "eagerly" in the same query as
that of the parent, using a JOIN or LEFT OUTER JOIN.
None - no loading should occur at any time. This is to support
"write-only" attributes, or attributes which are
populated in some manner specific to the application.
'dynamic' - a ``DynaLoader`` will be attached, which returns a
``Query`` object for all read operations. The
dynamic- collection supports only ``append()`` and
``remove()`` for write operations; changes to the
dynamic property will not be visible until the data
is flushed to the database.
:param order_by:
indicates the ordering that should be applied when loading these
items.
:param passive_deletes=False:
Indicates loading behavior during delete operations.
A value of True indicates that unloaded child items should not
be loaded during a delete operation on the parent. Normally,
when a parent item is deleted, all child items are loaded so
that they can either be marked as deleted, or have their
foreign key to the parent set to NULL. Marking this flag as
True usually implies an ON DELETE rule is in
place which will handle updating/deleting child rows on the
database side.
Additionally, setting the flag to the string value 'all' will
disable the "nulling out" of the child foreign keys, when there
is no delete or delete-orphan cascade enabled. This is
typically used when a triggering or error raise scenario is in
place on the database side. Note that the foreign key
attributes on in-session child objects will not be changed
after a flush occurs so this is a very special use-case
setting.
:param passive_updates=True:
Indicates loading and INSERT/UPDATE/DELETE behavior when the
source of a foreign key value changes (i.e. an "on update"
cascade), which are typically the primary key columns of the
source row.
When True, it is assumed that ON UPDATE CASCADE is configured on
the foreign key in the database, and that the database will
handle propagation of an UPDATE from a source column to
dependent rows. Note that with databases which enforce
referential integrity (i.e. PostgreSQL, MySQL with InnoDB tables),
ON UPDATE CASCADE is required for this operation. The
relation() will update the value of the attribute on related
items which are locally present in the session during a flush.
When False, it is assumed that the database does not enforce
referential integrity and will not be issuing its own CASCADE
operation for an update. The relation() will issue the
appropriate UPDATE statements to the database in response to the
change of a referenced key, and items locally present in the
session during a flush will also be refreshed.
This flag should probably be set to False if primary key changes
are expected and the database in use doesn't support CASCADE
(i.e. SQLite, MySQL MyISAM tables).
:param post_update:
this indicates that the relationship should be handled by a
second UPDATE statement after an INSERT or before a
DELETE. Currently, it also will issue an UPDATE after the
instance was UPDATEd as well, although this technically should
be improved. This flag is used to handle saving bi-directional
dependencies between two individual rows (i.e. each row
references the other), where it would otherwise be impossible to
INSERT or DELETE both rows fully since one row exists before the
other. Use this flag when a particular mapping arrangement will
incur two rows that are dependent on each other, such as a table
that has a one-to-many relationship to a set of child rows, and
also has a column that references a single child row within that
list (i.e. both tables contain a foreign key to each other). If
a ``flush()`` operation returns an error that a "cyclical
dependency" was detected, this is a cue that you might want to
use ``post_update`` to "break" the cycle.
:param primaryjoin:
a ClauseElement that will be used as the primary join of this
child object against the parent object, or in a many-to-many
relationship the join of the primary object to the association
table. By default, this value is computed based on the foreign
key relationships of the parent and child tables (or association
table).
:param remote_side:
used for self-referential relationships, indicates the column or
list of columns that form the "remote side" of the relationship.
:param secondaryjoin:
a ClauseElement that will be used as the join of an association
table to the child object. By default, this value is computed
based on the foreign key relationships of the association and
child tables.
:param single_parent=(True|False):
when True, installs a validator which will prevent objects
from being associated with more than one parent at a time.
This is used for many-to-one or many-to-many relationships that
should be treated either as one-to-one or one-to-many. Its
usage is optional unless delete-orphan cascade is also
set on this relation(), in which case its required (new in 0.5.2).
:param uselist=(True|False):
a boolean that indicates if this property should be loaded as a
list or a scalar. In most cases, this value is determined
automatically by ``relation()``, based on the type and direction
of the relationship - one to many forms a list, many to one
forms a scalar, many to many is a list. If a scalar is desired
where normally a list would be present, such as a bi-directional
one-to-one relationship, set uselist to False.
:param viewonly=False:
when set to True, the relation is used only for loading objects
within the relationship, and has no effect on the unit-of-work
flush process. Relationships with viewonly can specify any kind of
join conditions to provide additional views of related objects
onto a parent object. Note that the functionality of a viewonly
relationship has its limits - complicated join conditions may
not compile into eager or lazy loaders properly. If this is the
case, use an alternative method.
t secondary( R ( t argumentRK RJ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR6 µ s ðc C sn d d k l } t | d | d | d | d | d | d | d | d
| d | d |
d
| d | d | d |
ƒS( s˜ Construct a dynamically-loading mapper property.
This property is similar to :func:`relation`, except read
operations return an active :class:`Query` object which reads from
the database when accessed. Items may be appended to the
attribute via ``append()``, or removed via ``remove()``; changes
will be persisted to the database during a :meth:`Sesion.flush`.
However, no other Python list or collection mutation operations
are available.
A subset of arguments available to :func:`relation` are available
here.
:param argument:
a class or :class:`Mapper` instance, representing the target of
the relation.
:param secondary:
for a many-to-many relationship, specifies the intermediary
table. The *secondary* keyword argument should generally only
be used for a table that is not otherwise expressed in any class
mapping. In particular, using the Association Object Pattern is
generally mutually exclusive with the use of the *secondary*
keyword argument.
:param query_class:
Optional, a custom Query subclass to be used as the basis for
dynamic collection.
iÿÿÿÿ( t
DynaLoaderRK t primaryjoint
secondaryjoint foreign_keysR% t post_updatet cascadet remote_sidet enable_typecheckst passive_deletest order_byt comparator_factoryt strategy_classt query_class( t sqlalchemy.orm.dynamicRM R ( RL RK RN RO RP R% RQ RR RS RT RU RV RW RY RM ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR0 § s # c O s
t | | Ž S( s Provide a column-level property for use with a Mapper.
Column-based properties can normally be applied to the mapper's
``properties`` dictionary using the ``schema.Column`` element directly.
Use this function when the given column is not directly present within the
mapper's selectable; examples include SQL expressions, functions, and
scalar SELECT queries.
Columns that aren't present in the mapper's selectable won't be persisted
by the mapper and are effectively "read-only" attributes.
\*cols
list of Column objects to be mapped.
comparator_factory
a class which extends ``sqlalchemy.orm.properties.ColumnProperty.Comparator``
which provides custom SQL clause generation for comparison operations.
group
a group name for this property when marked as deferred.
deferred
when True, the column property is "deferred", meaning that
it does not load immediately, and is instead loaded when the
attribute is first accessed on an instance. See also
:func:`~sqlalchemy.orm.deferred`.
extension
an :class:`~sqlalchemy.orm.interfaces.AttributeExtension` instance,
or list of extensions, which will be prepended to the list of
attribute listeners for the resulting descriptor placed on the class.
These listeners will receive append and set events before the
operation proceeds, and may be used to halt (via exception throw)
or change the value used in the operation.
( R ( t argsRJ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR' Ô s &c O s t | | | Ž S( so
Return a composite column-based property for use with a Mapper.
This is very much like a column-based property except the given class is
used to represent "composite" values composed of one or more columns.
The class must implement a constructor with positional arguments matching
the order of columns supplied here, as well as a __composite_values__()
method which returns values in the same order.
A simple example is representing separate two columns in a table as a
single, first-class "Point" object::
class Point(object):
def __init__(self, x, y):
self.x = x
self.y = y
def __composite_values__(self):
return self.x, self.y
def __eq__(self, other):
return other is not None and self.x == other.x and self.y == other.y
# and then in the mapping:
... composite(Point, mytable.c.x, mytable.c.y) ...
The composite object may have its attributes populated based on the names
of the mapped columns. To override the way internal state is set,
additionally implement ``__set_composite_values__``::
class Point(object):
def __init__(self, x, y):
self.some_x = x
self.some_y = y
def __composite_values__(self):
return self.some_x, self.some_y
def __set_composite_values__(self, x, y):
self.some_x = x
self.some_y = y
def __eq__(self, other):
return other is not None and self.some_x == other.x and self.some_y == other.y
Arguments are:
class\_
The "composite type" class.
\*cols
List of Column objects to be mapped.
group
A group name for this property when marked as deferred.
deferred
When True, the column property is "deferred", meaning that it does not
load immediately, and is instead loaded when the attribute is first
accessed on an instance. See also :func:`~sqlalchemy.orm.deferred`.
comparator_factory
a class which extends ``sqlalchemy.orm.properties.CompositeProperty.Comparator``
which provides custom SQL clause generation for comparison operations.
extension
an :class:`~sqlalchemy.orm.interfaces.AttributeExtension` instance,
or list of extensions, which will be prepended to the list of
attribute listeners for the resulting descriptor placed on the class.
These listeners will receive append and set events before the
operation proceeds, and may be used to halt (via exception throw)
or change the value used in the operation.
( R ( t class_t colsRJ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR* ü s Fc K s
t | | S( sÚ Create a BackRef object with explicit arguments, which are the same
arguments one can send to ``relation()``.
Used with the `backref` keyword argument to ``relation()`` in
place of a string argument.
( R ( t nameRJ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR% E s c O s t d t | | Ž S( sé Return a ``DeferredColumnProperty``, which indicates this
object attributes should only be loaded from its corresponding
table column when first accessed.
Used with the `properties` dictionary sent to ``mapper()``.
R/ ( R RH ( t columnsRJ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR/ O s c O s t | | | | Ž S( s) Return a new :class:`~sqlalchemy.orm.Mapper` object.
class\_
The class to be mapped.
local_table
The table to which the class is mapped, or None if this mapper
inherits from another mapper using concrete table inheritance.
always_refresh
If True, all query operations for this mapped class will overwrite all
data within object instances that already exist within the session,
erasing any in-memory changes with whatever information was loaded
from the database. Usage of this flag is highly discouraged; as an
alternative, see the method `populate_existing()` on
:class:`~sqlalchemy.orm.query.Query`.
allow_null_pks
Indicates that composite primary keys where one or more (but not all)
columns contain NULL is a valid primary key. Primary keys which
contain NULL values usually indicate that a result row does not
contain an entity and should be skipped.
batch
Indicates that save operations of multiple entities can be batched
together for efficiency. setting to False indicates that an instance
will be fully saved before saving the next instance, which includes
inserting/updating all table rows corresponding to the entity as well
as calling all ``MapperExtension`` methods corresponding to the save
operation.
column_prefix
A string which will be prepended to the `key` name of all Columns when
creating column-based properties from the given Table. Does not
affect explicitly specified column-based properties
concrete
If True, indicates this mapper should use concrete table inheritance
with its parent mapper.
extension
A :class:`~sqlalchemy.orm.MapperExtension` instance or list of
``MapperExtension`` instances which will be applied to all
operations by this ``Mapper``.
inherits
Another ``Mapper`` for which this ``Mapper`` will have an inheritance
relationship with.
inherit_condition
For joined table inheritance, a SQL expression (constructed
``ClauseElement``) which will define how the two tables are joined;
defaults to a natural join between the two tables.
inherit_foreign_keys
when inherit_condition is used and the condition contains no
ForeignKey columns, specify the "foreign" columns of the join
condition in this list. else leave as None.
order_by
A single ``Column`` or list of ``Columns`` for which
selection operations should use as the default ordering for entities.
Defaults to the OID/ROWID of the table if any, or the first primary
key column of the table.
non_primary
Construct a ``Mapper`` that will define only the selection of
instances, not their persistence. Any number of non_primary mappers
may be created for a particular class.
polymorphic_on
Used with mappers in an inheritance relationship, a ``Column`` which
will identify the class/mapper combination to be used with a
particular row. Requires the ``polymorphic_identity`` value to be set
for all mappers in the inheritance hierarchy. The column specified by
``polymorphic_on`` is usually a column that resides directly within
the base mapper's mapped table; alternatively, it may be a column that
is only present within the portion of the
``with_polymorphic`` argument.
_polymorphic_map
Used internally to propagate the full map of polymorphic identifiers
to surrogate mappers.
polymorphic_identity
A value which will be stored in the Column denoted by polymorphic_on,
corresponding to the *class identity* of this mapper.
polymorphic_fetch
Deprecated. Unloaded columns load as deferred in all cases; loading
can be controlled using the "with_polymorphic" option.
properties
A dictionary mapping the string names of object attributes to
``MapperProperty`` instances, which define the persistence behavior of
that attribute. Note that the columns in the mapped table are
automatically converted into ``ColumnProperty`` instances based on the
`key` property of each ``Column`` (although they can be overridden
using this dictionary).
include_properties
An inclusive list of properties to map. Columns present in the mapped
table but not present in this list will not be automatically converted
into properties.
exclude_properties
A list of properties not to map. Columns present in the mapped table
and present in this list will not be automatically converted into
properties. Note that neither this option nor include_properties will
allow an end-run around Python inheritance. If mapped class ``B``
inherits from mapped class ``A``, no combination of includes or
excludes will allow ``B`` to have fewer properties than its
superclass, ``A``.
primary_key
A list of ``Column`` objects which define the *primary key* to be used
against this mapper's selectable unit. This is normally simply the
primary key of the `local_table`, but can be overridden here.
with_polymorphic
A tuple in the form ``(, )`` indicating the
default style of "polymorphic" loading, that is, which tables are
queried at once. is any single or list of mappers and/or
classes indicating the inherited classes that should be loaded at
once. The special value ``'*'`` may be used to indicate all descending
classes should be loaded immediately. The second tuple argument
indicates a selectable that will be used to query for
multiple classes. Normally, it is left as None, in which case this
mapper will form an outer join from the base mapper's table to that of
all desired sub-mappers. When specified, it provides the selectable
to be used for polymorphic loading. When with_polymorphic includes
mappers which load from a "concrete" inheriting table, the
argument is required, since it usually requires more
complex UNION queries.
select_table
Deprecated. Synonymous with
``with_polymorphic=('*', )``.
version_id_col
A ``Column`` which must have an integer type that will be used to keep
a running *version id* of mapped entities in the database. this is
used during save operations to ensure that no other thread or process
has updated the instance during the lifetime of the entity, else a
``ConcurrentModificationError`` exception is thrown.
( R ( R\ t local_tableR[ t params( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR Y s ”c C s t | d | d | d | ƒS( s Set up `name` as a synonym to another mapped property.
Used with the ``properties`` dictionary sent to :func:`~sqlalchemy.orm.mapper`.
Any existing attributes on the class which map the key name sent
to the ``properties`` dictionary will be used by the synonym to provide
instance-attribute behavior (that is, any Python property object, provided
by the ``property`` builtin or providing a ``__get__()``, ``__set__()``
and ``__del__()`` method). If no name exists for the key, the
``synonym()`` creates a default getter/setter object automatically and
applies it to the class.
`name` refers to the name of the existing mapped property, which can be
any other ``MapperProperty`` including column-based properties and
relations.
If `map_column` is ``True``, an additional ``ColumnProperty`` is created
on the mapper automatically, using the synonym's name as the keyname of
the property, and the keyname of this ``synonym()`` as the name of the
column to map. For example, if a table has a column named ``status``::
class MyClass(object):
def _get_status(self):
return self._status
def _set_status(self, value):
self._status = value
status = property(_get_status, _set_status)
mapper(MyClass, sometable, properties={
"status":synonym("_status", map_column=True)
})
The column named ``status`` will be mapped to the attribute named
``_status``, and the ``status`` attribute on ``MyClass`` will be used to
proxy access to the column-based attribute.
The `proxy` keyword argument is deprecated and currently does nothing;
synonyms now always establish an attribute getter/setter function if one
is not already available.
t
map_columnt
descriptorRW ( R ( R^ Rb Rc RW t proxy( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR8 ï s *c C s
t | | ƒ S( sÒ Provide query semantics for an unmanaged attribute.
Allows a regular Python @property (descriptor) to be used in Queries and
SQL constructs like a managed attribute. comparable_property wraps a
descriptor with a proxy that directs operator overrides such as ==
(__eq__) to the supplied comparator but proxies everything else through to
the original descriptor::
class MyClass(object):
@property
def myprop(self):
return 'foo'
class MyComparator(sqlalchemy.orm.interfaces.PropComparator):
def __eq__(self, other):
....
mapper(MyClass, mytable, properties=dict(
'myprop': comparable_property(MyComparator)))
Used with the ``properties`` dictionary sent to :func:`~sqlalchemy.orm.mapper`.
comparator_factory
A PropComparator subclass or factory that defines operator behavior
for this property.
descriptor
Optional when used in a ``properties={}`` declaration. The Python
descriptor or property to layer comparison behavior on top of.
The like-named descriptor will be automatically retreived from the
mapped class if left blank in a ``properties`` declaration.
( R ( RW Rc ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR( s #c C s% x t t ƒ D] } | i ƒ q
Wd S( s| Compile all mappers that have been defined.
This is equivalent to calling ``compile()`` on any individual mapper.
N( t listR t compile( t m( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR) @ s
c C sG t i i ƒ z% x t t ƒ D] } | i ƒ q WWd t i i ƒ Xd S( sª Remove all mappers that have been created thus far.
The mapped classes will return to their initial "unmapped" state and can
be re-mapped with new mappers.
N( t mapperlibt _COMPILE_MUTEXt acquireRe R t disposet release( R ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR& I s
c C s
t | ƒ S( sÚ Return a ``MapperOption`` that will insert the given
``MapperExtension`` to the beginning of the list of extensions
that will be called in the context of the ``Query``.
Used with ``query.options()``.
( R ( t ext( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR3 W s t list_deprecationt pendingc G s t i | d t ƒS( sŒ Return a ``MapperOption`` that will convert the property of the given
name into an eager load.
Used with ``query.options()``.
t lazy( R t EagerLazyOptionRG ( t keys( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR1 a s c G s t i | d t d t ƒS( sd Return a ``MapperOption`` that will convert all properties along the
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For example, this::
query.options(eagerload_all('orders.items.keywords'))...
will set all of 'orders', 'orders.items', and 'orders.items.keywords' to
load in one eager load.
Used with ``query.options()``.
Rp t chained( R Rq RG RH ( Rr ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR2 k s c G s t i | d t ƒS( sŠ Return a ``MapperOption`` that will convert the property of the given
name into a lazy load.
Used with ``query.options()``.
Rp ( R Rq RH ( Rr ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR4 | s c G s t i | d d ƒS( s‰ Return a ``MapperOption`` that will convert the property of the
given name into a non-load.
Used with ``query.options()``.
Rp N( R Rq t None( Rr ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR5 † s c C s
t | ƒ S( s¹ Return a ``MapperOption`` that will indicate to the query that
the main table has been aliased.
`alias` is the string name or ``Alias`` object representing the
alias.
( R ( t alias( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR+ s c O sd | i d d ƒ } | o t i d | i ƒ ƒ ‚ n t i | d t d t ƒt i | d | ƒf S( sà Return a ``MapperOption`` that will indicate to the query that
the given attribute will be eagerly loaded.
Used when feeding SQL result sets directly into ``query.instances()``.
Also bundles an ``EagerLazyOption`` to turn on eager loading in case it
isn't already.
`alias` is the string name of an alias, **or** an ``sql.Alias`` object,
which represents the aliased columns in the query. This argument is
optional.
Ru s% Invalid kwargs for contains_eager: %rRp t
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ArgumentErrorRr R Rq RG RH t LoadEagerFromAliasOption( Rr RJ Ru ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR, ™ s c G s t i | d t ƒS( s“ Return a ``MapperOption`` that will convert the column property of the
given name into a deferred load.
Used with ``query.options()``
R. ( R t DeferredOptionRH ( Rr ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR. s c G s t i | d t ƒS( sª Return a ``MapperOption`` that will convert the column property of the
given name into a non-deferred (regular column) load.
Used with ``query.options()``.
R. ( R Rz RG ( Rr ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR9 ¶ s c C s
t i | ƒ S( s² Return a ``MapperOption`` that will convert the given group of deferred
column properties into a non-deferred (regular column) load.
Used with ``query.options()``.
( R t UndeferGroupOption( R^ ( ( s; /usr/lib/python2.6/site-packages/sqlalchemy/orm/__init__.pyR: À s N(( s EXT_CONTINUEs EXT_STOPs InstrumentationManagers MapperExtensions Validators PropComparators Querys aliaseds backrefs class_mappers
clear_mapperss column_propertys comparable_propertys compile_mapperss composites contains_aliass contains_eagers create_sessions defers deferreds dynamic_loaders eagerloads
eagerload_alls extensions joins lazyloads mappers noloads
object_mappers object_sessions outerjoins polymorphic_unions
reconstructors relations scoped_sessions sessionmakers synonyms undefers
undefer_groups validates(O t __doc__t sqlalchemy.ormR t sqlalchemy.orm.mapperR R R t sqlalchemy.orm.interfacesR R R R R R R
t sqlalchemy.orm.utilR R$ R R
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