Can't find commodity using gnc_commodity_table_lookup()

Derek Atkins warlord at MIT.EDU
Tue Nov 11 08:43:42 EST 2008


Justin Mazzola Paluska <jmp at MIT.EDU> writes:

> Hi,
> I’m trying to write a small program to add (historical) prices to my
> gnucash file.  I’m basing my approach off of some code I found on the
> gnucash-users list
> (
> Essentially, my code opens up the book, tries to find a commodity
> (hard coded to “GOOG” for testing) and then creates a new price for
> that commodity.  I’ve attached my code to this message, as well as an
> example.gnucash file that I’ve been using.
> Unfortunately, I’m getting stuck — even though I’ve defined a GOOG
> security in my gnucash file, I can’t seem to retrieve it from my file
> using “gnc_commodity_table_lookup()”: I always get NULL for my
> commodity, even though I can zless the example.gnucash file and can
> see my commodity, as well as edit it in gnucash.
> To wit, here’s a transcript of a session with my code:
>     if (gnc_commodity_table_has_namespace(table, "NYSE")) {
> 	printf("Has NYSE namespace\n");
>     }
>     commodity = gnc_commodity_table_lookup(table,
> 					   "GOOG");
>     if (!commodity) {
> 	printf("commodity is NULL\n");
> 	return 1;
>     }

Well, for one thing I would either use "NYCE" or GNC_COMMODITY_NS_NYSE
in both places.  Yes, technically they should be the same, but you might
as well test that theory.

I didn't look into the data file to verify that you configured GOOG
under NYCE.

       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL:    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available

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