On Mon, 2011-04-11 at 11:54 +0200, Vivien Malerba wrote: > On 11 April 2011 10:29, Murray Cumming <[email protected]> wrote: > > On Sun, 2011-04-10 at 13:06 +0200, Murray Cumming wrote: > >> On Sun, 2011-04-10 at 11:52 +0200, Murray Cumming wrote: > >> > On Sat, 2011-04-09 at 18:39 +0200, Vivien Malerba wrote: > >> > > 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. > > > > The PyGObject developers don't seem happy with this: > > https://bugzilla.gnome.org/show_bug.cgi?id=647272#c2 > > I don't know why Libgda uses G_TYPE_INVALID instead of G_TYPE_NONE > (some historical reason, lack of knowledge,...). > > > > > Maybe it's something we can change in libgda-5.0. > > I guess that can be done, I have to check the impacts first. However I > can't change the V4 behaviour, so for the GObject introspection, a > solution needs to be found.
For libgda-4.0 can't we just tell people to use the older pygda. Nobody was really using it anyway. -- [email protected] www.murrayc.com www.openismus.com _______________________________________________ gnome-db-list mailing list [email protected] http://mail.gnome.org/mailman/listinfo/gnome-db-list
