On 8 April 2011 22:12, Murray Cumming <[email protected]> wrote: > GObject+Introspection is working quite well for me now with libgda. > Thanks. I am glad that pygda is now obsolete, so it's one less module > for me to maintain. > > However, I'm getting an error when trying to get the values from the > DataModel with get_value_at(). For instance, this script > http://git.gnome.org/browse/pygda/tree/examples/gda/select.py?h=introspection > produces this error: > > Traceback (most recent call last): > File "./select.py", line 61, in <module> > main () > File "./select.py", line 57, in main > print " value=", data_model.get_value_at(col_index, > row_index); > File "/opt/gnome230/lib/python2.7/site-packages/gi/types.py", line 44, > in function > return info.invoke(*args) > TypeError: unknown type (null) > > > Presumably it doesn't like GdaValues with GType=0 (when > gda_value_is_null(gvalue) is true).
Yes, the a GValue with a 0 GType represents a SQL NULL value, whereas if the returned value is NULL (the C NULL) then it means there was an error retreiving the value, hence the difference between the 2. Regards, Vivien _______________________________________________ gnome-db-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gnome-db-list
