* psionl0 <gsch...@iinet.net.au> [2021-12-07 19:18]:
> Ledger doesn't need to "know" the conversion rate when a transaction
> contains multiple currencies. It just has to "assume" that whatever
> the exchange rate is will balance the transaction (ie assume
> nothing).
Your "assume nothing" is to assume something.
I don't want ledger to make assumptions. I want ledger to enforce
the balancing requirement.
Personally I don't like that ledger allows implicit conversations
since ledger assumes an exchange rate. Beancount, for example,
requires an explicit exchange rate when there are only two postings /
two commodities.
Let's do:
2021-12-08 * Test
Assets:A 10.00 EUR
Assets:B -8.52 GBP
If you know roughly the values of EUR and GBP, this transaction
looks obviously correct to you. But this requires a lot of knowledge
(i.e. assumptions about the world).
Now:
2021-12-08 * Test
Assets:A 1000 EUR ; let's say I forgot the . between the 00s
Assets:B -8.52 GBP
You'd probably agree that this isn't quite right, yet ledger will
happily assume an (incorrect) exchange rate.
Using explicit exchange rates makes ledger enforce the balancing
requirement.
If I had done:
2021-12-08 * Test
Assets:A 1000 EUR @ 0.852 GBP
Assets:B -8.52 GBP
ledger would complain.
You *WANT* ledger to complain.
You don't want ledger to assume.
> The reason why I question this is that ledger could also be used to
> record items of stock in the same way that it records currencies.
> Unfortunately, as it stands, I have to record the purchase or sale
> of each item of stock individually which breaks up the bank
> transaction and makes it more difficult to reconcile with my bank
> statement. Using @ or @@ prevents ledger from displaying the
> individual item totals in the balance report (they have all been
> converted).
Maybe you could give an example, so it's clearer.
--
Martin Michlmayr
https://www.cyrius.com/
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