sqlalchemy.orm.strategies.LazyLoader

class documentation

class LazyLoader(AbstractRelationshipLoader, util.MemoizedSlots, log.Identified): (source)

Provide loading behavior for a :class:`.Relationship` with "lazy=True", that is loads when first accessed.

Method	`__init__`	Undocumented
Method	`create_row_processor`	Establish row processing functions for a given QueryContext.
Method	`init_class_attribute`	Undocumented
Class Variable	`__slots__`	Undocumented
Class Variable	`parent_property`	Undocumented
Instance Variable	`is_aliased_class`	Undocumented
Instance Variable	`is_class_level`	Undocumented
Instance Variable	`use_get`	Undocumented
Method	`_emit_lazyload`	Undocumented
Method	`_generate_lazy_clause`	Undocumented
Method	`_get_ident_for_use_get`	Undocumented
Method	`_invoke_raise_load`	Undocumented
Method	`_load_for_state`	Undocumented
Method	`_memoized_attr__simple_lazy_clause`	Undocumented
Instance Variable	`_bind_to_col`	Undocumented
Instance Variable	`_equated_columns`	Undocumented
Instance Variable	`_lazywhere`	Undocumented
Instance Variable	`_order_by`	Undocumented
Instance Variable	`_raise_always`	Undocumented
Instance Variable	`_raise_on_sql`	Undocumented
Instance Variable	`_rev_bind_to_col`	Undocumented
Instance Variable	`_rev_equated_columns`	Undocumented
Instance Variable	`_rev_lazywhere`	Undocumented

Inherited from AbstractRelationshipLoader:

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

Inherited from LoaderStrategy (via AbstractRelationshipLoader):

Method	`__str__`	Undocumented
Method	`setup_query`	Establish column and other state for a given QueryContext.
Instance Variable	`key`	Undocumented
Instance Variable	`parent`	Undocumented
Instance Variable	`strategy_key`	Undocumented
Instance Variable	`strategy_opts`	Undocumented
Class Variable	`_strategy_keys`	Undocumented

Inherited from MemoizedSlots (via AbstractRelationshipLoader, LoaderStrategy):

Method	`__getattr__`	Undocumented
Method	`_fallback_getattr`	Undocumented

Inherited from Identified (via AbstractRelationshipLoader, LoaderStrategy, MemoizedSlots):

Class Variable	`logger`	Undocumented
Class Variable	`logging_name`	Undocumented
Method	`_should_log_debug`	Undocumented
Method	`_should_log_info`	Undocumented
Class Variable	`_echo`	Undocumented

def __init__(self, parent: RelationshipProperty[Any], strategy_key: Tuple[Any, ...]): (source) ¶

overrides sqlalchemy.orm.strategies.AbstractRelationshipLoader.__init__

Undocumented

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

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): (source) ¶

overrides sqlalchemy.orm.interfaces.LoaderStrategy.init_class_attribute

Undocumented

__slots__: tuple[str, ...] = (source) ¶

overrides sqlalchemy.orm.strategies.AbstractRelationshipLoader.__slots__

Undocumented

parent_property: RelationshipProperty[Any] = (source) ¶

overrides sqlalchemy.orm.interfaces.LoaderStrategy.parent_property

Undocumented

is_aliased_class = (source) ¶

Undocumented

is_class_level: bool = (source) ¶

overrides sqlalchemy.orm.interfaces.LoaderStrategy.is_class_level

Undocumented

use_get = (source) ¶

Undocumented

@util.preload_module('sqlalchemy.orm.strategy_options')
def _emit_lazyload(self, session, state, primary_key_identity, passive, loadopt, extra_criteria, extra_options, alternate_effective_path, execution_options): (source) ¶

Undocumented

def _generate_lazy_clause(self, state, passive): (source) ¶

Undocumented

def _get_ident_for_use_get(self, session, state, passive): (source) ¶

Undocumented

def _invoke_raise_load(self, state, passive, lazy): (source) ¶

Undocumented

def _load_for_state(self, state, passive, loadopt=None, extra_criteria=(), extra_options=(), alternate_effective_path=None, execution_options=util.EMPTY_DICT): (source) ¶

Undocumented

def _memoized_attr__simple_lazy_clause(self): (source) ¶

Undocumented

_bind_to_col = (source) ¶

Undocumented

_equated_columns = (source) ¶

Undocumented

_lazywhere = (source) ¶

Undocumented

_order_by = (source) ¶

Undocumented

_raise_always = (source) ¶