Method before_create

lib/sqlalchemy/sql/events.py:179–213

r"""Called before CREATE statements are emitted. :param target: the :class:`.SchemaObject`, such as a :class:`_schema.MetaData` or :class:`_schema.Table` but also including all create/drop objects such as :class:`.Index`, :class:`.Sequence`, etc., object

(
        self, target: SchemaEventTarget, connection: Connection, **kw: Any
    )

    _dispatch_target = SchemaEventTarget

    def before_create(
        self, target: SchemaEventTarget, connection: Connection, **kw: Any
    ) -> None:
        r"""Called before CREATE statements are emitted.

        :param target: the :class:`.SchemaObject`, such as a
         :class:`_schema.MetaData` or :class:`_schema.Table`
         but also including all create/drop objects such as
         :class:`.Index`, :class:`.Sequence`, etc.,
         object which is the target of the event.

         .. versionadded:: 2.0 Support for all :class:`.SchemaItem` objects
            was added.

        :param connection: the :class:`_engine.Connection` where the
         CREATE statement or statements will be emitted.
        :param \**kw: additional keyword arguments relevant
         to the event.  The contents of this dictionary
         may vary across releases, and include the
         list of tables being generated for a metadata-level
         event, the checkfirst flag, and other
         elements used by internal events.

        :func:`.event.listen` accepts the ``propagate=True``
        modifier for this event; when True, the listener function will
        be established for any copies made of the target object,
        i.e. those copies that are generated when
        :meth:`_schema.Table.to_metadata` is used.

        :func:`.event.listen` accepts the ``insert=True``
        modifier for this event; when True, the listener function will
        be prepended to the internal list of events upon discovery, and execute
        before registered listener functions that do not pass this argument.

        """

    def after_create(
        self, target: SchemaEventTarget, connection: Connection, **kw: Any