Make sure you're responding to the list, please....
Quoting Andrew Sackville-West <[EMAIL PROTECTED]>:
E.g., here's a problem case:
Buy 100 shares on date T0
pricedb entry on date T1
pricedb entry on date T2
Sell 50 shares on date T3
Let's assume that delta-t is something like a week or a month, or even
a year. The value of the sale at T3 could be VERY DIFFERENT than the
value in the pricedb at time T2. When looking at the value of your
holding at time T4, IMHO you should use the price from time T3, not
the price from time T2.
Perhaps we need some C code to make this easier to compute "on the
fly". But it's IMHO how it should work.
yeah, I understand now. good example. So the issue I see is that we
have to get away from exchange-fn altogether as that is what breaks
without a pricedb. AM I right? So I have to come up with some other way
of converting the currencies. The real problem here is that I just
don't understand what Mike's patch was supposed to do in the first
place. All I did was fix it so it ran :). Alright, I'm off to study
this thing more closely and see if I can figure out the proper way to
do it. I'll report back captain.
I'm not sure we have to get away from exchange-fn altogether.. Although
we might need to extend it a bit. The current exchange-fn is defined in
report-system/commodity-utilities.scm : gnc:case-exchange-fn and returns
a procedure that does the computation. There are some docs there in
the source file.
I'm not convinced the problem here is exchange-fn. I think the problem is
partly that we're assuming a price-db earlier and creating bad commodity
collectors.
I'm hoping Mike will chime in and explain to you what he was trying to do.
You're always welcome to pull out a particular version of the report from
SVN. http://svn.gnucash.org/trac/browser
Good Luck,
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
[EMAIL PROTECTED] PGP key available
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