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Classe « Query »

Méthode sqlalchemy.orm.Query.correlate

Signature de la méthode correlate

def correlate(self, *fromclauses: 'Union[Literal[None, False], _FromClauseArgument]') -> 'Self' 

Description

help(Query.correlate)

Return a :class:`.Query` construct which will correlate the given
FROM clauses to that of an enclosing :class:`.Query` or
:func:`~.expression.select`.

The method here accepts mapped classes, :func:`.aliased` constructs,
and :class:`_orm.Mapper` constructs as arguments, which are resolved
into expression constructs, in addition to appropriate expression
constructs.

The correlation arguments are ultimately passed to
:meth:`_expression.Select.correlate`
after coercion to expression constructs.

The correlation arguments take effect in such cases
as when :meth:`_query.Query.from_self` is used, or when
a subquery as returned by :meth:`_query.Query.subquery` is
embedded in another :func:`_expression.select` construct.

.. seealso::

    :meth:`_sql.Select.correlate` - v2 equivalent method.

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