sqlalchemy.sql.traversals.HasCopyInternals

class documentation

class HasCopyInternals(object):

Known subclasses: sqlalchemy.orm.attributes.QueryableAttribute, sqlalchemy.sql.expression.ClauseElement, sqlalchemy.sql.base.ExecutableOption, sqlalchemy.sql.selectable._MemoizedSelectEntities

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Undocumented

Method ​_clone Undocumented
Method ​_copy​_internals Reassign internal elements to be clones of themselves.
def _clone(self, **kw):
overridden in sqlalchemy.orm.attributes.QueryableAttribute, sqlalchemy.sql.expression.ClauseElement, sqlalchemy.sql.base.ExecutableOption, sqlalchemy.sql.selectable._MemoizedSelectEntities

Undocumented

def _copy_internals(self, omit_attrs=(), **kw):
overridden in sqlalchemy.dialects.postgresql.aggregate_order_by, sqlalchemy.sql.elements.Label, sqlalchemy.sql.expression.AliasedReturnsRows, sqlalchemy.sql.expression.Join, sqlalchemy.sql.expression.LambdaElement, sqlalchemy.sql.expression.Select, sqlalchemy.sql.crud._multiparam_column, sqlalchemy.sql.elements.TableValuedColumn

Reassign internal elements to be clones of themselves.

Called during a copy-and-traverse operation on newly shallow-copied elements to create a deep copy.

The given clone function should be used, which may be applying additional transformations to the element (i.e. replacement traversal, cloned traversal, annotations).