Classe « Query »

Méthode sqlalchemy.orm.Query.set_label_style

Signature de la méthode set_label_style

def set_label_style(self, style) 

Description

set_label_style.__doc__

Apply column labels to the return value of Query.statement.

        Indicates that this Query's `statement` accessor should return
        a SELECT statement that applies labels to all columns in the
        form <tablename>_<columnname>; this is commonly used to
        disambiguate columns from multiple tables which have the same
        name.

        When the `Query` actually issues SQL to load rows, it always
        uses column labeling.

        .. note:: The :meth:`_query.Query.set_label_style` method *only* applies
           the output of :attr:`_query.Query.statement`, and *not* to any of
           the result-row invoking systems of :class:`_query.Query` itself,
           e.g.
           :meth:`_query.Query.first`, :meth:`_query.Query.all`, etc.
           To execute
           a query using :meth:`_query.Query.set_label_style`, invoke the
           :attr:`_query.Query.statement` using :meth:`.Session.execute`::

                result = session.execute(
                    query
                    .set_label_style(LABEL_STYLE_TABLENAME_PLUS_COL)
                    .statement
                )

        .. versionadded:: 1.4