sqlalchemy.orm.strategies.UninstrumentedColumnLoader

class documentation

class UninstrumentedColumnLoader(LoaderStrategy):

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Represent a non-instrumented MapperProperty.

The polymorphic_on argument of mapper() often results in this, if the argument is against the with_polymorphic selectable.

Method __init__ Undocumented
Method create​_row​_processor Establish row processing functions for a given QueryContext.
Method setup​_query Establish column and other state for a given QueryContext.
Class Variable __slots__ Undocumented
Instance Variable columns Undocumented

Inherited from LoaderStrategy:

Method __str__ Undocumented
Method init​_class​_attribute 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.interfaces.LoaderStrategy.__init__

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 setup_query(self, compile_state, query_entity, path, loadopt, adapter, column_collection=None, **kwargs):
overrides sqlalchemy.orm.interfaces.LoaderStrategy.setup_query

Establish column and other state for a given QueryContext.

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

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

__slots__: tuple[str, ...] =
overrides sqlalchemy.orm.interfaces.LoaderStrategy.__slots__

Undocumented

columns =

Undocumented