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Classe « Query »

Méthode sqlalchemy.orm.Query.set_label_style

Signature de la méthode set_label_style

def set_label_style(self, style: 'SelectLabelStyle') -> 'Self' 

Description

help(Query.set_label_style)

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


.. seealso::

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

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