On Jun 9, 2011, at 3:57 AM, Eric Lemoine wrote: > Hi > > Here's another issue with porting GeoAlchemy to SQLAlchemy 0.7. > > > So GeoA defines a TypeEngine, which looks like this: > > class Geometry(TypeEngine): > > def __init__(self, dimension=2, srid=4326, spatial_index=True, **kwargs): > self.dimension = dimension > self.srid = srid > self.spatial_index = True > self.kwargs = kwargs > super(GeometryBase, self).__init__() > > > Using the Geometry type with Oracle requires passing an additional > argument to the constructor, namely "diminfo": > > Geometry(dimension=2, srid=4326, spatial_index=True, > diminfo='the_diminfo_string') > > Then our Oracle-specific code uses type.kwargs['diminfo'] to access > the "diminfo" value. > > > This worked well with SQLA 0.6, but it doesn't work with SQLA 0.7. > > It doesn't work with 0.7 because SQLA may clone the type instance, and > because of the way SQLA clones object (constructor_copy), the clone > does not have self.kwargs['diminfo'].
That's the default adaption provided by TypeEngine.adapt(). Provide your own adapt() that does what's needed. For examples see Interval, Enum. -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.
