Classe « Query »

Méthode sqlalchemy.orm.Query.first

Signature de la méthode first

def first(self) 

Description

first.__doc__

Return the first result of this ``Query`` or
        None if the result doesn't contain any row.

        first() applies a limit of one within the generated SQL, so that
        only one primary entity row is generated on the server side
        (note this may consist of multiple result rows if join-loaded
        collections are present).

        Calling :meth:`_query.Query.first`
        results in an execution of the underlying
        query.

        .. seealso::

            :meth:`_query.Query.one`

            :meth:`_query.Query.one_or_none`