moo.core.models.object.AncestorCache

class moo.core.models.object.AncestorCache(*args, **kwargs)

Denormalized flat table of ancestor relationships for fast indexed JOINs. Replaces recursive CTE usage in hot-path verb and property lookups. Maintained by the relationship_changed() signal on parents.add/remove.

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
adelete([using, keep_parents])
arefresh_from_db([using, fields])
asave([force_insert, force_update, using, ...])
check(**kwargs)
clean()	Hook for doing any extra model-wide validation after clean() has been called on every field by self.clean_fields.
clean_fields([exclude])	Clean all fields and raise a ValidationError containing a dict of all validation errors if any occur.
date_error_message(lookup_type, field_name, ...)
delete([using, keep_parents])
from_db(db, field_names, values)
full_clean([exclude, validate_unique, ...])	Call clean_fields(), clean(), validate_unique(), and validate_constraints() on the model.
get_constraints()
get_deferred_fields()	Return a set containing names of deferred fields for this instance.
prepare_database_save(field)
refresh_from_db([using, fields])	Reload field values from the database.
save([force_insert, force_update, using, ...])	Save the current instance.
save_base([raw, force_insert, force_update, ...])	Handle the parts of saving which should be done only once per save, yet need to be done in raw saves, too.
serializable_value(field_name)	Return the value of the field name for this instance.
unique_error_message(model_class, unique_check)
validate_constraints([exclude])
validate_unique([exclude])	Check unique constraints on the model and raise ValidationError if any failed.

Attributes

ancestor	The ancestor Object reachable from descendant.
ancestor_id
depth	Number of hops from descendant to ancestor.
descendant	The descendant Object — the row says "this object inherits from ancestor at depth hops".
descendant_id
id	A wrapper for a deferred-loading field.
objects
path_weight	Relationship.weight of the depth-1 link leading to this ancestor.
pk