sqlalchemy.orm.strategies.JoinedLoader

class documentation

class JoinedLoader(AbstractRelationshipLoader):

Provide loading behavior for a .RelationshipProperty using joined eager loading.

Method	`__init__`	Undocumented
Method	`_create_collection_loader`	Undocumented
Method	`_create_eager_adapter`	Undocumented
Method	`_create_eager_join`	Undocumented
Method	`_create_scalar_loader`	Undocumented
Method	`_gen_pooled_aliased_class`	Undocumented
Method	`_generate_row_adapter`	Undocumented
Method	`_init_user_defined_eager_proc`	Undocumented
Method	`_setup_query_on_user_defined_adapter`	Undocumented
Method	`_splice_nested_inner_join`	Undocumented
Method	`create_row_processor`	Establish row processing functions for a given QueryContext.
Method	`init_class_attribute`	Undocumented
Method	`setup_query`	Add a left outer join to the statement that's being constructed.
Class Variable	`__slots__`	Undocumented
Instance Variable	`_aliased_class_pool`	Undocumented
Instance Variable	`join_depth`	Undocumented

Inherited from AbstractRelationshipLoader:

Instance Variable	`entity`	Undocumented
Instance Variable	`mapper`	Undocumented
Instance Variable	`target`	Undocumented
Instance Variable	`uselist`	Undocumented

Inherited from LoaderStrategy (via AbstractRelationshipLoader):

Method	`__str__`	Undocumented
Instance Variable	`is_class_level`	Undocumented
Instance Variable	`key`	Undocumented
Instance Variable	`parent`	Undocumented
Instance Variable	`parent_property`	Undocumented
Instance Variable	`strategy_key`	Undocumented
Instance Variable	`strategy_opts`	Undocumented

def __init__(self, parent, strategy_key):

overrides sqlalchemy.orm.strategies.AbstractRelationshipLoader.__init__

Undocumented

def _create_collection_loader(self, context, key, _instance, populators):

Undocumented

def _create_eager_adapter(self, context, result, adapter, path, loadopt):

Undocumented

def _create_eager_join(self, compile_state, query_entity, path, adapter, parentmapper, clauses, innerjoin, chained_from_outerjoin, extra_criteria):

Undocumented

def _create_scalar_loader(self, context, key, _instance, populators):

Undocumented

def _gen_pooled_aliased_class(self, context):

Undocumented

def _generate_row_adapter(self, compile_state, entity, path, loadopt, adapter, column_collection, parentmapper, chained_from_outerjoin):

Undocumented

def _init_user_defined_eager_proc(self, loadopt, compile_state, target_attributes):

Undocumented

def _setup_query_on_user_defined_adapter(self, context, entity, path, adapter, user_defined_adapter):

Undocumented

def _splice_nested_inner_join(self, path, join_obj, clauses, onclause, extra_criteria, splicing=False):

Undocumented

def create_row_processor(self, context, query_entity, path, loadopt, mapper, result, adapter, populators):

overrides sqlalchemy.orm.interfaces.LoaderStrategy.create_row_processor

Establish row processing functions for a given QueryContext.

This method fulfills the contract specified by MapperProperty.create_row_processor().

StrategizedProperty delegates its create_row_processor() method directly to this method.

def init_class_attribute(self, mapper):

overrides sqlalchemy.orm.interfaces.LoaderStrategy.init_class_attribute

Undocumented

def setup_query(self, compile_state, query_entity, path, loadopt, adapter, column_collection=None, parentmapper=None, chained_from_outerjoin=False, **kwargs):

overrides sqlalchemy.orm.interfaces.LoaderStrategy.setup_query

Add a left outer join to the statement that's being constructed.

__slots__: tuple[str, ...] =

overrides sqlalchemy.orm.strategies.AbstractRelationshipLoader.__slots__

Undocumented

_aliased_class_pool: list =

Undocumented

join_depth =

Undocumented