Classe « TypeDecorator »

Méthode sqlalchemy.TypeDecorator.coerce_compared_value

Signature de la méthode coerce_compared_value

def coerce_compared_value(self, op, value) 

Description

coerce_compared_value.__doc__

Suggest a type for a 'coerced' Python value in an expression.

        By default, returns self.   This method is called by
        the expression system when an object using this type is
        on the left or right side of an expression against a plain Python
        object which does not yet have a SQLAlchemy type assigned::

            expr = table.c.somecolumn + 35

        Where above, if ``somecolumn`` uses this type, this method will
        be called with the value ``operator.add``
        and ``35``.  The return value is whatever SQLAlchemy type should
        be used for ``35`` for this particular operation.