+h3 ~dZddlmZddlmZddlmZddlZddlZddl m Z ddl m Z dd l m Z dd l mZdd l mZdd l mZdd lmZddlmZddlmZddlmZddlmZddlmZddlmZddlmZddlmZddlmZddlmZddlm Z ddl m!Z!ddl m Z"ddl m#Z#ddl m$Z$ddl m%Z%ddl m&Z&dd l mZddl&mZ'dd l&m(Z(dd!l&m)Z)dd"l&m*Z*dd#l&m+Z+dd l&mZ,dd$l&m-Z-dd%l.m/Z/dd&lm0Z0ejbZ2dZ3d'Z4d(Z5d)a6ejnd*Z8ejrjuZ;e#jxe$jzGd+d,eee'j|eZ?Gd-d.e@ZAd/ZBd0ZCejd1d2ZEejd1d3ZFd4ZGd5ZHd6ZId7ZJGd8d9eKZLy):a5Logic to map Python classes to and from selectables. Defines the :class:`~sqlalchemy.orm.mapper.Mapper` class, the central configurational unit which associates a class with a database table. This is a semi-private module; the main configurational API of the ORM is available in :class:`~sqlalchemy.orm.`. )absolute_import)deque)chainN) attributes)exc)instrumentation)loading) properties)util)_class_to_mapper) _state_mapper) class_mapper) state_str)_MappedAttribute)EXT_SKIP)InspectionAttr)MapperProperty)ORMEntityColumnsClauseRole)ORMFromClauseRole)StrategizedProperty) PathRegistry)event) inspection)log)schema)sql)base) coercions) expression) operators)roles)visitors)LABEL_STYLE_TABLENAME_PLUS_COL) HasMemoizedcXt5ttcdddS#1swYyxYwN)_CONFIGURE_MUTEXset_mapper_registriesH/var/www/html/venv/lib/python3.12/site-packages/sqlalchemy/orm/mapper.py_all_registriesr/@s# '%&'''s )c#\KtD]}|jD]}|ywr()r/_mappers_to_configure)regmappers r._unconfigured_mappersr4Es5 //1 FL s*,F NO_ATTRIBUTEc eZdZdZdZdZejd dzdZdZ dZ e dZ d Z e d ZdZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ dZ e ejBd d d Z"ejFdZ$dZ%dZ&dZ'dZ(dZ)dZ*dZ+dZ,dZ-d{dZ.dZ/e0jbdZ2e0jbdZ3e0jbdZ4ejjddZ6ejjdd|dZ7ejjddZ8d Z9d!Z:d"Z;d#Zd&Z?d'Z@d(ZAd)ZBd*ZCd+ZDd}d,ZEd-ZFe d.ZGd/ZHd0ZIe0jbd1ZJe0jbd2ZKe0jbd3ZLe0jbd4ZMe0jbd5ZNeLZO e0jbd6ZPe0jbd7ZQe0jbd8ZRe0jbd9ZSe0jbd:ZTe0jbd;ZUe0jbd<ZVe0jbd=ZWe0jd>ZYejFd?ZZe d@Z[ d~dAZ\e0jbdBZ]e dCZ^ddDZ_e0jbdEZ`ddFZae0jbdGZbe0jbdHZce0jbejjddIZde0jbejjddJZee dKZfe0jbdLZgejjdMe0jbdNZhe0jbejjddOZidPZje0jbdQZke0jbdRZldSZme0jbdTZndUZodVZpdWZqdXZrdYZsdZZte0jbd[Zud\Zvd]Zwe d^Zxdd_Zydd`ZzddaZ{dbZ|e}jfdcZddZe0jbdeZe0jbdfZe0jbdgZe0jbdhZe0jbdiZe}jfdjZdkZdlZdmZe}jfdnZdoZdpZdqZejjdrdsZe0jbdtZdduZe0jbdvZe0jbdwZdxZejFdyZy)MapperaDefines an association between a Python class and a database table or other relational structure, so that ORM operations against the class may proceed. The :class:`_orm.Mapper` object is instantiated using mapping methods present on the :class:`_orm.registry` object. For information about instantiating new :class:`_orm.Mapper` objects, see :ref:`orm_mapping_classes_toplevel`. F)1.3aThe :paramref:`.mapper.non_primary` parameter is deprecated, and will be removed in a future release. The functionality of non primary mappers is now better suited using the :class:`.AliasedClass` construct, which can also be used as the target of a :func:`_orm.relationship` in 1.3.) non_primaryNTctj|td|_|jjd|jj |_d|_tj||_ ||_ | |_ t| tr| |_d|_n| |_| durd|_n| d|_n| |_||_d|_||_|*t)j*t,j.||_nd|_||_||_|xsi|_g|_||_||_||_| &t)j*t,j@| dnd|_!g|_"tjF|_$||_%||_&||_'d|_(d|_)d|_*i|_+||_,d|_-||_.|j&r|j"sd|_/n||_/|ja|||_1||_2| i|_3n| |_3|tjh||_5nd|_5|rtjh||_6nd|_6tn5|jpjrju|||jw|jy|j{|j}|j|jj||jd|jdddy#1swYyxYw) aUODirect constructor for a new :class:`_orm.Mapper` object. The :func:`_orm.mapper` function is normally invoked through the use of the :class:`_orm.registry` object through either the :ref:`Declarative ` or :ref:`Imperative ` mapping styles. .. versionchanged:: 1.4 The :func:`_orm.mapper` function should not be called directly for classical mapping; for a classical mapping configuration, use the :meth:`_orm.registry.map_imperatively` method. The :func:`_orm.mapper` function may become private in a future release. Parameters documented below may be passed to either the :meth:`_orm.registry.map_imperatively` method, or may be passed in the ``__mapper_args__`` declarative class attribute described at :ref:`orm_declarative_mapper_options`. :param class\_: The class to be mapped. When using Declarative, this argument is automatically passed as the declared class itself. :param local_table: The :class:`_schema.Table` or other selectable to which the class is mapped. May be ``None`` if this mapper inherits from another mapper using single-table inheritance. When using Declarative, this argument is automatically passed by the extension, based on what is configured via the ``__table__`` argument or via the :class:`_schema.Table` produced as a result of the ``__tablename__`` and :class:`_schema.Column` arguments present. :param 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 :meth:`_query.Query.populate_existing`. :param allow_partial_pks: Defaults to True. Indicates that a composite primary key with some NULL values should be considered as possibly existing within the database. This affects whether a mapper will assign an incoming row to an existing identity, as well as if :meth:`.Session.merge` will check the database first for a particular primary key value. A "partial primary key" can occur if one has mapped to an OUTER JOIN, for example. :param batch: Defaults to ``True``, indicating 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. This is used in the extremely rare case that a :class:`.MapperEvents` listener requires being called in between individual row persistence operations. :param column_prefix: A string which will be prepended to the mapped attribute name when :class:`_schema.Column` objects are automatically assigned as attributes to the mapped class. Does not affect :class:`.Column` objects that are mapped explicitly in the :paramref:`.mapper.properties` dictionary. This parameter is typically useful with imperative mappings that keep the :class:`.Table` object separate. Below, assuming the ``user_table`` :class:`.Table` object has columns named ``user_id``, ``user_name``, and ``password``:: class User(Base): __table__ = user_table __mapper_args__ = {'column_prefix':'_'} The above mapping will assign the ``user_id``, ``user_name``, and ``password`` columns to attributes named ``_user_id``, ``_user_name``, and ``_password`` on the mapped ``User`` class. The :paramref:`.mapper.column_prefix` parameter is uncommon in modern use. For dealing with reflected tables, a more flexible approach to automating a naming scheme is to intercept the :class:`.Column` objects as they are reflected; see the section :ref:`mapper_automated_reflection_schemes` for notes on this usage pattern. :param concrete: If True, indicates this mapper should use concrete table inheritance with its parent mapper. See the section :ref:`concrete_inheritance` for an example. :param confirm_deleted_rows: defaults to True; when a DELETE occurs of one more rows based on specific primary keys, a warning is emitted when the number of rows matched does not equal the number of rows expected. This parameter may be set to False to handle the case where database ON DELETE CASCADE rules may be deleting some of those rows automatically. The warning may be changed to an exception in a future release. .. versionadded:: 0.9.4 - added :paramref:`.mapper.confirm_deleted_rows` as well as conditional matched row checking on delete. :param eager_defaults: if True, the ORM will immediately fetch the value of server-generated default values after an INSERT or UPDATE, rather than leaving them as expired to be fetched on next access. This can be used for event schemes where the server-generated values are needed immediately before the flush completes. By default, this scheme will emit an individual ``SELECT`` statement per row inserted or updated, which note can add significant performance overhead. However, if the target database supports :term:`RETURNING`, the default values will be returned inline with the INSERT or UPDATE statement, which can greatly enhance performance for an application that needs frequent access to just-generated server defaults. .. seealso:: :ref:`orm_server_defaults` .. versionchanged:: 0.9.0 The ``eager_defaults`` option can now make use of :term:`RETURNING` for backends which support it. :param exclude_properties: A list or set of string column names to be excluded from mapping. See :ref:`include_exclude_cols` for an example. :param include_properties: An inclusive list or set of string column names to map. See :ref:`include_exclude_cols` for an example. :param inherits: A mapped class or the corresponding :class:`_orm.Mapper` of one indicating a superclass to which this :class:`_orm.Mapper` should *inherit* from. The mapped class here must be a subclass of the other mapper's class. When using Declarative, this argument is passed automatically as a result of the natural class hierarchy of the declared classes. .. seealso:: :ref:`inheritance_toplevel` :param inherit_condition: For joined table inheritance, a SQL expression which will define how the two tables are joined; defaults to a natural join between the two tables. :param inherit_foreign_keys: When ``inherit_condition`` is used and the columns present are missing a :class:`_schema.ForeignKey` configuration, this parameter can be used to specify which columns are "foreign". In most cases can be left as ``None``. :param legacy_is_orphan: Boolean, defaults to ``False``. When ``True``, specifies that "legacy" orphan consideration is to be applied to objects mapped by this mapper, which means that a pending (that is, not persistent) object is auto-expunged from an owning :class:`.Session` only when it is de-associated from *all* parents that specify a ``delete-orphan`` cascade towards this mapper. The new default behavior is that the object is auto-expunged when it is de-associated with *any* of its parents that specify ``delete-orphan`` cascade. This behavior is more consistent with that of a persistent object, and allows behavior to be consistent in more scenarios independently of whether or not an orphan object has been flushed yet or not. See the change note and example at :ref:`legacy_is_orphan_addition` for more detail on this change. :param non_primary: Specify that this :class:`_orm.Mapper` is in addition to the "primary" mapper, that is, the one used for persistence. The :class:`_orm.Mapper` created here may be used for ad-hoc mapping of the class to an alternate selectable, for loading only. .. seealso:: :ref:`relationship_aliased_class` - the new pattern that removes the need for the :paramref:`_orm.Mapper.non_primary` flag. :param passive_deletes: Indicates DELETE behavior of foreign key columns when a joined-table inheritance entity is being deleted. Defaults to ``False`` for a base mapper; for an inheriting mapper, defaults to ``False`` unless the value is set to ``True`` on the superclass mapper. When ``True``, it is assumed that ON DELETE CASCADE is configured on the foreign key relationships that link this mapper's table to its superclass table, so that when the unit of work attempts to delete the entity, it need only emit a DELETE statement for the superclass table, and not this table. When ``False``, a DELETE statement is emitted for this mapper's table individually. If the primary key attributes local to this table are unloaded, then a SELECT must be emitted in order to validate these attributes; note that the primary key columns of a joined-table subclass are not part of the "primary key" of the object as a whole. Note that a value of ``True`` is **always** forced onto the subclass mappers; that is, it's not possible for a superclass to specify passive_deletes without this taking effect for all subclass mappers. .. versionadded:: 1.1 .. seealso:: :ref:`passive_deletes` - description of similar feature as used with :func:`_orm.relationship` :paramref:`.mapper.passive_updates` - supporting ON UPDATE CASCADE for joined-table inheritance mappers :param passive_updates: Indicates UPDATE behavior of foreign key columns when a primary key column changes on a joined-table inheritance mapping. Defaults to ``True``. 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 columns on joined-table rows. 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 unit of work process will emit an UPDATE statement for the dependent columns during a primary key change. .. seealso:: :ref:`passive_updates` - description of a similar feature as used with :func:`_orm.relationship` :paramref:`.mapper.passive_deletes` - supporting ON DELETE CASCADE for joined-table inheritance mappers :param polymorphic_load: Specifies "polymorphic loading" behavior for a subclass in an inheritance hierarchy (joined and single table inheritance only). Valid values are: * "'inline'" - specifies this class should be part of the "with_polymorphic" mappers, e.g. its columns will be included in a SELECT query against the base. * "'selectin'" - specifies that when instances of this class are loaded, an additional SELECT will be emitted to retrieve the columns specific to this subclass. The SELECT uses IN to fetch multiple subclasses at once. .. versionadded:: 1.2 .. seealso:: :ref:`with_polymorphic_mapper_config` :ref:`polymorphic_selectin` :param polymorphic_on: Specifies the column, attribute, or SQL expression used to determine the target class for an incoming row, when inheriting classes are present. This value is commonly a :class:`_schema.Column` object that's present in the mapped :class:`_schema.Table`:: class Employee(Base): __tablename__ = 'employee' id = Column(Integer, primary_key=True) discriminator = Column(String(50)) __mapper_args__ = { "polymorphic_on":discriminator, "polymorphic_identity":"employee" } It may also be specified as a SQL expression, as in this example where we use the :func:`.case` construct to provide a conditional approach:: class Employee(Base): __tablename__ = 'employee' id = Column(Integer, primary_key=True) discriminator = Column(String(50)) __mapper_args__ = { "polymorphic_on":case([ (discriminator == "EN", "engineer"), (discriminator == "MA", "manager"), ], else_="employee"), "polymorphic_identity":"employee" } It may also refer to any attribute configured with :func:`.column_property`, or to the string name of one:: class Employee(Base): __tablename__ = 'employee' id = Column(Integer, primary_key=True) discriminator = Column(String(50)) employee_type = column_property( case([ (discriminator == "EN", "engineer"), (discriminator == "MA", "manager"), ], else_="employee") ) __mapper_args__ = { "polymorphic_on":employee_type, "polymorphic_identity":"employee" } When setting ``polymorphic_on`` to reference an attribute or expression that's not present in the locally mapped :class:`_schema.Table`, yet the value of the discriminator should be persisted to the database, the value of the discriminator is not automatically set on new instances; this must be handled by the user, either through manual means or via event listeners. A typical approach to establishing such a listener looks like:: from sqlalchemy import event from sqlalchemy.orm import object_mapper @event.listens_for(Employee, "init", propagate=True) def set_identity(instance, *arg, **kw): mapper = object_mapper(instance) instance.discriminator = mapper.polymorphic_identity Where above, we assign the value of ``polymorphic_identity`` for the mapped class to the ``discriminator`` attribute, thus persisting the value to the ``discriminator`` column in the database. .. warning:: Currently, **only one discriminator column may be set**, typically on the base-most class in the hierarchy. "Cascading" polymorphic columns are not yet supported. .. seealso:: :ref:`inheritance_toplevel` :param polymorphic_identity: Specifies the value which identifies this particular class as returned by the column expression referred to by the ``polymorphic_on`` setting. As rows are received, the value corresponding to the ``polymorphic_on`` column expression is compared to this value, indicating which subclass should be used for the newly reconstructed object. :param properties: A dictionary mapping the string names of object attributes to :class:`.MapperProperty` instances, which define the persistence behavior of that attribute. Note that :class:`_schema.Column` objects present in the mapped :class:`_schema.Table` are automatically placed into ``ColumnProperty`` instances upon mapping, unless overridden. When using Declarative, this argument is passed automatically, based on all those :class:`.MapperProperty` instances declared in the declared class body. .. seealso:: :ref:`orm_mapping_properties` - in the :ref:`orm_mapping_classes_toplevel` :param primary_key: A list of :class:`_schema.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. .. seealso:: :ref:`mapper_primary_key` - background and example use :param version_id_col: A :class:`_schema.Column` that will be used to keep a running version id of rows in the table. This is used to detect concurrent updates or the presence of stale data in a flush. The methodology is to detect if an UPDATE statement does not match the last known version id, a :class:`~sqlalchemy.orm.exc.StaleDataError` exception is thrown. By default, the column must be of :class:`.Integer` type, unless ``version_id_generator`` specifies an alternative version generator. .. seealso:: :ref:`mapper_version_counter` - discussion of version counting and rationale. :param version_id_generator: Define how new version ids should be generated. Defaults to ``None``, which indicates that a simple integer counting scheme be employed. To provide a custom versioning scheme, provide a callable function of the form:: def generate_version(version): return next_version Alternatively, server-side versioning functions such as triggers, or programmatic versioning schemes outside of the version id generator may be used, by specifying the value ``False``. Please see :ref:`server_side_version_counter` for a discussion of important points when using this option. .. versionadded:: 0.9.0 ``version_id_generator`` supports server-side version number generation. .. seealso:: :ref:`custom_version_counter` :ref:`server_side_version_counter` :param 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. .. seealso:: :ref:`with_polymorphic` - discussion of polymorphic querying techniques. class_.NFc|xsddzS)Nrrr,)xs r.z!Mapper.__init__..cs16Q,r-polymorphic_on)argname constructed)Dr assert_arg_typetyper; __module____name__ _sort_key class_managerto_list_primary_key_argumentr9always_refresh isinstancerversion_id_propversion_id_colversion_id_generatorconcretesingleinheritsr expectr#StrictFromClauseRole local_tableinherit_conditioninherit_foreign_keys_init_properties_delete_orphansbatcheager_defaults column_prefixColumnArgumentOrKeyRoler@_dependency_processors EMPTY_DICT validatorspassive_updatespassive_deleteslegacy_is_orphan_clause_adapter_requires_row_aliasing_inherits_equated_pairs_memoized_values_compiled_cache_size_reconstructorallow_partial_pksconfirm_deleted_rows_set_with_polymorphicpolymorphic_loadpolymorphic_identitypolymorphic_mapto_setinclude_propertiesexclude_propertiesr)dispatch_events_new_mapper_instance_configure_inheritance _configure_class_instrumentation_configure_properties_configure_polymorphic_setter_configure_pksregistry_flag_new_mapper_log_expire_memoizations)selfr;rUr primary_keyr9rRrVrWrKrNrOr@_polymorphic_maprnrPwith_polymorphicrmrjrZr\rqrrrarbrkr[rcrhs r.__init__zMapper.__init__msB**64B KK " " KK   "%)\\+%>"&, nn 5#1D "&D "0D  5 ((-D % ! )(>D %(|j@}t/jB|j jD||_#n|j|_|jHl|j|_%|jjLj(ttjNd|d|jjLj(dn9|j$r|j|_%n|jjJ|_%|jP7|jjP|_(|jjR|_)n|jjPp|jP|jjPurNtjNd|jPj6d|jjPj6d|jjT|_*|jjV|_+|jjjY||jjL|_&|jjZ|_-|jj\xs |j\|_.|jj^|_/|jH~|jH|jTvrMtjNd|jHd|jT|jHd|d|jHd ||jT|jH<|j`r!|j$rtjd|j`d k(r|jjc|n|j`d!k(rn|j`tjd"|j`zte|_/||_&|j|_|jH||jT|jH<|j|_%|j tjd#|zy #tj2$r}|jjJ|jJtj4tj2d|jjj6d|jj6d|Yd }~8d }~wtj8$r}|jjJ|jJtj4tj8d|jjj6d|jj6d|Yd }~d }~wwxYw)$zXConfigure settings related to inheriting and/or inherited mappers being present.F) configurezClass 'z' does not inherit from ''primaryz non-primaryzInheritance of z mapper for class 'z' is only allowed from a z mapperNTz?Can't determine the inherit condition between inherited table 'z' and inheriting table 'z'; tables have no foreign key relationships established. 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This is an object that provides each property based on its key name. For instance, the mapper for a ``User`` class which has ``User.name`` attribute would provide ``mapper.attrs.name``, which would be the :class:`.ColumnProperty` representing the ``name`` column. The namespace object can also be iterated, which would yield each :class:`.MapperProperty`. :class:`_orm.Mapper` has several pre-filtered views of this attribute which limit the types of properties returned, including :attr:`.synonyms`, :attr:`.column_attrs`, :attr:`.relationships`, and :attr:`.composites`. .. warning:: The :attr:`_orm.Mapper.attrs` accessor namespace is an instance of :class:`.OrderedProperties`. This is a dictionary-like object which includes a small number of named methods such as :meth:`.OrderedProperties.items` and :meth:`.OrderedProperties.values`. When accessing attributes dynamically, favor using the dict-access scheme, e.g. ``mapper.attrs[somename]`` over ``getattr(mapper.attrs, somename)`` to avoid name collisions. .. seealso:: :attr:`_orm.Mapper.all_orm_descriptors` )rqr ImmutablePropertiesrrs r.attrsz Mapper.attrs s&F '' 44r-cntjt|jj S)ay A namespace of all :class:`.InspectionAttr` attributes associated with the mapped class. These attributes are in all cases Python :term:`descriptors` associated with the mapped class or its superclasses. This namespace includes attributes that are mapped to the class as well as attributes declared by extension modules. It includes any Python descriptor type that inherits from :class:`.InspectionAttr`. This includes :class:`.QueryableAttribute`, as well as extension types such as :class:`.hybrid_property`, :class:`.hybrid_method` and :class:`.AssociationProxy`. To distinguish between mapped attributes and extension attributes, the attribute :attr:`.InspectionAttr.extension_type` will refer to a constant that distinguishes between different extension types. The sorting of the attributes is based on the following rules: 1. Iterate through the class and its superclasses in order from subclass to superclass (i.e. iterate through ``cls.__mro__``) 2. For each class, yield the attributes in the order in which they appear in ``__dict__``, with the exception of those in step 3 below. In Python 3.6 and above this ordering will be the same as that of the class' construction, with the exception of attributes that were added after the fact by the application or the mapper. 3. If a certain attribute key is also in the superclass ``__dict__``, then it's included in the iteration for that class, and not the class in which it first appeared. The above process produces an ordering that is deterministic in terms of the order in which attributes were assigned to the class. .. versionchanged:: 1.3.19 ensured deterministic ordering for :meth:`_orm.Mapper.all_orm_descriptors`. When dealing with a :class:`.QueryableAttribute`, the :attr:`.QueryableAttribute.property` attribute refers to the :class:`.MapperProperty` property, which is what you get when referring to the collection of mapped properties via :attr:`_orm.Mapper.attrs`. .. warning:: The :attr:`_orm.Mapper.all_orm_descriptors` accessor namespace is an instance of :class:`.OrderedProperties`. This is a dictionary-like object which includes a small number of named methods such as :meth:`.OrderedProperties.items` and :meth:`.OrderedProperties.values`. When accessing attributes dynamically, favor using the dict-access scheme, e.g. ``mapper.all_orm_descriptors[somename]`` over ``getattr(mapper.all_orm_descriptors, somename)`` to avoid name collisions. .. seealso:: :attr:`_orm.Mapper.attrs` )r rr)rH_all_sqla_attributesrs r.all_orm_descriptorszMapper.all_orm_descriptors s/D'' ##88: ;  r-c^tjj}|jDchc]}|j}}|j j Dcic]@\}}t||jr%|j|vr|j|jBc}}Scc}wcc}}w)z~return a dictionary of {syn_attribute_name: pk_attr_name} for all synonyms that refer to primary key columns ) r rHrIrrrrrLSynonymPropertyr)rrOrpk_keysrr_s r. _pk_synonymszMapper._pk_synonyms s >>>>(,(@(@A488AA++++- 3#/??@G# GGSXX   B s B$AB)cltjj}|j|jS)aReturn a namespace of all :class:`.SynonymProperty` properties maintained by this :class:`_orm.Mapper`. .. seealso:: :attr:`_orm.Mapper.attrs` - namespace of all :class:`.MapperProperty` objects. )r rHrI_filter_propertiesr)rrOs r.synonymszMapper.synonyms$ s, >>>>&&'7'G'GHHr-c|jSr(rrs r.rzMapper.entity_namespace5 s {{r-c@|jtjS)aReturn a namespace of all :class:`.ColumnProperty` properties maintained by this :class:`_orm.Mapper`. .. seealso:: :attr:`_orm.Mapper.attrs` - namespace of all :class:`.MapperProperty` objects. )rr r4rs r. column_attrszMapper.column_attrs9 s&&z'@'@AAr-zsqlalchemy.orm.relationshipsch|jtjjjS)aLA namespace of all :class:`.RelationshipProperty` properties maintained by this :class:`_orm.Mapper`. .. warning:: the :attr:`_orm.Mapper.relationships` accessor namespace is an instance of :class:`.OrderedProperties`. This is a dictionary-like object which includes a small number of named methods such as :meth:`.OrderedProperties.items` and :meth:`.OrderedProperties.values`. When accessing attributes dynamically, favor using the dict-access scheme, e.g. ``mapper.relationships[somename]`` over ``getattr(mapper.relationships, somename)`` to avoid name collisions. .. seealso:: :attr:`_orm.Mapper.attrs` - namespace of all :class:`.MapperProperty` objects. )rr rHorm_relationshipsRelationshipPropertyrs r. relationshipszMapper.relationshipsG s*2&& NN , , A A  r-ch|jtjjjS)aReturn a namespace of all :class:`.CompositeProperty` properties maintained by this :class:`_orm.Mapper`. .. seealso:: :attr:`_orm.Mapper.attrs` - namespace of all :class:`.MapperProperty` objects. )rr rHrICompositePropertyrs r. compositeszMapper.compositesd s*&& NN / / A A  r-c|jtjtjfd|jj DS)Nc3FK|]\}}t|s||fywr()rL)rrvtype_s r.rz,Mapper._filter_properties..x s'1a*Q:NAs! !)rqr rr rr)rr(s `r.rzMapper._filter_propertiesu sJ ''   #';;#4#4#6   r-c ,t|jdDcgc]+\}}|tjd|z|jf-}}}tj |Dcgc] \}}||k( c}}t j|fScc}}wcc}}w)zcreate a "get clause" based on the primary key. this is used by query.get() and many-to-one lazyloads to load this item by primary key. rzpk_%dr() enumeraterr bindparamrDand_r column_dict)ridxrparamsrr's r. _get_clausezMapper._get_clause} s%.d.>.>$B  ![ gm;3C3CD    HHF3&1aqAv3 4   V $   4s 0B !B ctjfd}|jjD]2}|jt j |jid|i4S)aCreate a map of all equivalent columns, based on the determination of column pairs that are equated to one another based on inherit condition. This is designed to work with the queries that util.polymorphic_union comes up with, which often don't include the columns from the base table directly (including the subclass table columns only). The resulting structure is a dictionary of columns mapped to lists of equivalent columns, e.g.:: { tablea.col1: {tableb.col1, tablec.col1}, tablea.col2: {tabled.col2} } c|jtjk(r|jvr)|jj |j n-t j|j f|j<|j vr)|j j |jyt j|jf|j <yyr()operatorr"eqleftrrightr r )binaryrs r. visit_binaryz0Mapper._equivalent_columns..visit_binary s),,.;;&(6;;'++FLL9*.//6<+JF6<<(/r-r8)r r.rrrVr$traverse)rr9r3rs @r.r zMapper._equivalent_columns si*!!# K&&;; F''3!!,,b8\2J   r-c~t|ttjtj fry||j vSr)rLrr ClassManagerr!rc_dataclass_fields)r assigned_nameobjs r._is_userland_descriptorzMapper._is_userland_descriptor s=   ,,((   (>(>> >r-cztj|jDcgc]}|jc}Scc}wr()r dataclass_fieldsr;r)rfs r.r=zMapper._dataclass_fields s) $ 5 5dkk BC1CCCs8c|rQ|jjj|d [|j||jj|r2y|jj |d}||j||ry|j 3||j vr%|||j vr|jd|zy|j3||jvs|#||jvr|jd|zyy)zdetermine whether a particular property should be implicitly present on the class. This occurs when properties are propagated from an inherited class, or are applied from the columns present in the mapped table. NTznot including property %szexcluding property %sF) r;rrdr@rHrJrqr}rr)rrr>rrattrs r.rzMapper._should_exclude s {{##''t"::t{{33MB%%99-NDD$@$@t%  # # /D33361H1H#H II1T: ;  " " . D++ +"v1H1H'H II-6 7r-c2|j|juS)zXReturn true if the given mapper shares a common inherited parent as this mapper.)rrothers r. common_parentzMapper.common_parent s5#4#444r-c|j|juxr&|j| xr|j| S)z{return true if the other mapper is an inheriting sibling to this one. common parent but different branch )rrrGs r. is_siblingzMapper.is_sibling sC    1 1 1 $HHUO# $IIdO# r-c|j}|j|rt|j|St||uSr()primary_mapperr@rr)rr+allow_subtypesss r._canloadzMapper._canload sD    !    *n '++A. . '1, ,r-cN|}|r||ur|j}|r||urt|S)z>Return True if the this mapper inherits from the given mapper.)rRbool)rrHr]s r.rz Mapper.isa s/ AUN AAUNAwr-c#<K|}|r||j}|ryywr()rR)rr]s r.rzMapper.iterate_to_root s! 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Applies to a joined-table inheritance mapper where the requested attribute names are only present on joined tables, not the base table. The WHERE clause attempts to include only those tables to minimize joins. T) check_columnsNcd|j}|j}||y|jvr{jj|t j }|tjvr ttjd||jj|_y|jvr{jj|t j }|tjvr ttjd||jj|_yy)Nrr*) r6r7rrr)rPASSIVE_NO_INITIALIZEorm_util _none_set_OptGetColumnsNotAvailablerr,rD)r8leftcolrightcolleftvalrightvalrr+rs r.r9z5Mapper._optimized_get_statement..visit_binary s kkG||H("2}}F*BBJJ&<< C h000466!mm'):): v-CCJJ&<< D x111466"}}(&,,*;*;  .r-Frr8) rr*r r3rr\rrrrrrUreversedrrrLr! TableClauserQrrVrr$cloned_traverserrr-r?selectwhereset_label_styler%)rr+attribute_namespropscol_attribute_namesrrr9allcondsstartr3condrrs`` @r._optimized_get_statementzMapper._optimized_get_statement s !/2?? LL % % * * ,   3"3Z//(($??      ' '6 1 > tD$8$8$:;< /F!!V+ 2 2J4J4JKV]] 8 89 6--. / "22 R(L!9HQK xx"& ,C KKc ** + , JJ  U4[ _; < UD*  s2G+G11 G=<G=c#K|j|r8|}|jD]"}|||ur||jvry|}||us"yyywr()rrr)rr3prevr]s r._iterate_to_target_viawpolyz"Mapper._iterate_to_target_viawpolyE s_ 88F D))+ D=T1L1L%L;  s AA A cx|s,|}|j|D]}|jdk(s|cSyt|}|Dcic]}|j|}}|j |gD]M}|j}|j|D]+}|jdk(s||vs|j ||ccSOycc}w)Nr)rrmr*r3rrd)renabled_via_optpolymorphic_fromr3r]eenabled_via_opt_mappersrs r._should_selectin_loadzMapper._should_selectin_loadR s%F55f= %%3H  "/2OjA| } | D cgc]} |j>jA| } } | jC| jEt1jFddjH| } njt1j8|j;t<} | jC| jEt1jFddjH| } | ||fScc}wcc} w)zbAssemble a that can load the columns local to this subclass as a SELECT with IN. do_nothingT _orm_adaptrr primary_keys) expanding)%r rHorm_strategy_optionsrRr@rr*rLoadrrrHrMrLrset_generic_strategyr6rr) strategy_keyrr_deep_annotaterrtuple_is_aliased_classr3rrr%_adapterr:rrr,order_by) rrstrategy_optionspolymorphic_prop keep_props disable_opt enable_optrpkrin_exprqrs r._subclass_load_via_inzMapper._subclass_load_via_inh s  >>>>}}}    *#55d6I6IJ ./$2J2JJKJT556J&++F3 %**62 JJ D xxt111{{d"dj&8"$(;<//V44dhh?A**+ 00V44dhh?A!4( 3 F&&   # #Bt(< =  { a jj+.G!!nG  " "==D( (( 6"22.Aoo..w7G@KL16??33A6LKL CMM.DIJh %A  4 00.A CMM.DIJh %A*k))? $Ms 2K2"K7c$|j|Sr()rrs r._subclass_load_via_in_mapperz#Mapper._subclass_load_via_in_mapper s))$//r-c #Kt}tt}}|jj|sJt t |jj j |||jfg}|r|d\}} } } |s|j| |urU|j} || jvrBt | j|| | ||} | rm|j| |ddfnW| |urS|j\}}}}||||f|jt |j j |||f|ryyw)a.Iterate each element and its mapper in an object graph, for all relationships that meet the given cascade rule. :param type\_: The name of the cascade rule (i.e. ``"save-update"``, ``"delete"``, etc.). .. note:: the ``"all"`` cascade is not accepted here. For a generic object traversal function, see :ref:`faq_walk_objects`. :param state: The lead InstanceState. child items will be processed per the relationships defined for this object's mapper. :return: the method yields individual object instances. .. seealso:: :ref:`unitofwork_cascades` :ref:`faq_walk_objects` - illustrates a generic function to traverse all objects without relying on cascades. rbN) r*objectr3rrrrEr)rr>rncascade_iteratorr)rr(r+halt_onvisited_statesprpmpp visitablesiterator item_type parent_state parent_dictrqueuerjinstance_mappercorresponding_statecorresponding_dicts r.rzMapper.cascade_iterator sr28VXS||%%%ELL''..013uzz J K =G^ :Hi{ C'') ,))$#& %%uc4&>?c! $$& #'&#'&  !!o44;;=>+* Es EEEc@tj|jSr()r LRUCacherhrs r._compiled_cachezMapper._compiled_cache s}}T6677r-c i |jjD]%}|jD]} j||'g} j D]?\}}|j }|s|j |jDcgc]}||fc}A fd}tj ||}tj} |D] } || |< | Scc}w)Ncj|jj}j|jj}||||ur|jt t j|j}|jL|jt j|j}|j|vxr|j|vS|j|vSyr) rdrMrrrVr*r _find_columnsr)fkrMdeprtable_to_mappers r.skipz#Mapper._sorted_tables..skip" s %((9F!%%biioo6C"Ov%))5811#2G2GHI++7:: ..v/G/GHD99D0JRYYd5JJ99D00r-)skip_fnextra_dependencies) rrr setdefaultrrRr?r sort_tablesr r ) rr3rrrsuper_ super_tablersorted_retrs @r._sorted_tableszMapper._sorted_tables s&&;; 6F]] 6**1f5 6 6 ,224 ME6__F"))=C]]Kkk5)K  0&& 1    (A$Q'CF ( ILs C cl||jvr|j|S|x|j|<}|Sr()rg)rr callable_rzs r._memoz Mapper._memoE s= $'' '((- -1: )//1 F Moo>>  "66== 9  H,#H   (v2E:.. v77 9'-&>&>#$$557//1OO55ffmmL3 >$C 3,,77=,,/ M):!,,.+C"3(;<360 s 2AE;;5F0ctjjj}t |}|j |D]}|s0|j j|rtjd|jr< |jj\}}|j||jr<|jj|j j|j D]}|j j#||j jd|_y#t$rYwxYw)Nz^Registry has dependent registries that are not disposed; pass cascade=True to clear these alsoF)r rHrr{r*_recurse_with_dependents _dependentsr{rr _managerspopitem_dispose_manager_and_mapperr3_non_primary_mappersclearrdiscardro)rrnr{rr2r_rs r._dispose_registriesr,s ~~**33H z?D00<!3??55d;,,8  mm 9 ]]224  //8mm   &&( $$ )C OO # #C ( ) ! !3!  sE E Ecd|_|S)aDecorate a method as the 'reconstructor' hook. Designates a single method as the "reconstructor", an ``__init__``-like method that will be called by the ORM after the instance has been loaded from the database or otherwise reconstituted. .. tip:: The :func:`_orm.reconstructor` decorator makes use of the :meth:`_orm.InstanceEvents.load` event hook, which can be used directly. The reconstructor will be invoked with no arguments. Scalar (non-collection) database-mapped attributes of the instance will be available for use within the function. Eagerly-loaded collections are generally not yet available and will usually only contain the first element. ORM state changes made to objects at this stage will not be recorded for the next flush() operation, so the activity within a reconstructor should be conservative. .. seealso:: :meth:`.InstanceEvents.load` T)r)r!s r. reconstructorr.#s4#B Ir-cb|jdd|jddfd}|S)aDecorate a method as a 'validator' for one or more named properties. Designates a method as a validator, a method which receives the name of the attribute as well as a value to be assigned, or in the case of a collection, the value to be added to the collection. The function can then raise validation exceptions to halt the process from continuing (where Python's built-in ``ValueError`` and ``AssertionError`` exceptions are reasonable choices), or can modify or replace the value before proceeding. The function should otherwise return the given value. Note that a validator for a collection **cannot** issue a load of that collection within the validation routine - this usage raises an assertion to avoid recursion overflows. This is a reentrant condition which is not supported. :param \*names: list of attribute names to be validated. :param include_removes: if True, "remove" events will be sent as well - the validation function must accept an additional argument "is_remove" which will be a boolean. :param include_backrefs: defaults to ``True``; if ``False``, the validation function will not emit if the originator is an attribute event related via a backref. This can be used for bi-directional :func:`.validates` usage where only one validator should emit per attribute operation. .. versionadded:: 0.9.0 .. seealso:: :ref:`simple_validators` - usage examples for :func:`.validates` include_removesFinclude_backrefsTc*|_d|_|S)N)r0r1)rr)r!r1r0namess r.wrapzvalidates..wrapgs"$. 0% ! r-)r)r3kwr4r1r0s` @@r. validatesr6As5Fff.6Ovv0$7 Kr-c|jj}|jr |j|jyyr()rr3rir?)r+ctxinstrumenting_mappers r.rrrs4 ==//**++EIIK8+r-c|jj}|r/|j|jr|j|yyy)zRun init_instance hooks. This also includes mapper compilation, normally not needed here but helps with some piecemeal configuration scenarios (such as in the ORM tutorial). N)rr3rqr.)r+rkwargsr9s r.rrysD!==//--/  9 9 : :5 A :r-c eZdZdZdZdZdZy)r!z4Error reporting helper for mapper._columntoproperty.r3c||_yr(r=rs r.rz_ColumnMapping.__init__s  r-c .|jjj|}|rItjd|j j d|j d|jd|tjd|d|jd)NzColumn 'r<z1' is not available, due to conflicting property 'z':z No column z is configured on mapper z...)r3rrdorm_excUnmappedColumnErrorrrr)rrrs r. __missing__z_ColumnMapping.__missing__sx{{!!%%f- --<<$$fkk6::tE  ))t{{ $  r-N)rFrErr __slots__rrBr,r-r.r!r!s>I  r-r!)Mr __future__r collectionsr itertoolsrrweakrefrrrr@r r r r rrr rrr interfacesrrrrrrr path_registryrrrrrrrrr r!r"r#rr$sql.selectabler%r&WeakKeyDictionaryr+rr/r4rsymbolr5 threadingRLockr)_self_inspects class_loggerMemoizedHasCacheKeyr7rrr rprrr,r.r6rrr)r!r,r-r.rRs' "( &&2)+'"";.W..0'   t{{>* >>'') E4    E4E4Ph  D;N:B.//0/d./!0!D<.b9 B  T r-