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Message #07506
[Bug 784339] Re: [stable 6.0.2] Account Balance Sheet parser logic error leads to incorrect totals amounts and developer confusion
Hi Jlinkels,
sorry about the patch. It is not a valid patch file but a readable
digest of one. You can apply it manually, it is indeed only the one
line.
If I am confused about all the issues surrounding the 6.0 financial
reports, it is because they were reported so many times and never fixed.
We have ported the reports from 6.0 to 6.1 and fixed the issues so that
they seem to work for us. You can find them here:
http://apps.openerp.com/addon/6715. I will try your scenario one of
these days and see if the module can be further improved (apart from
adding the translations)!
Cheers,
Stefan.
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https://bugs.launchpad.net/bugs/784339
Title:
[stable 6.0.2] Account Balance Sheet parser logic error leads to
incorrect totals amounts and developer confusion
Status in OpenERP Addons (modules):
Fix Released
Bug description:
If you look at the section where it calculates sum_dr and sum_cr it is
incorrect. Well it is technically correct, but in the sense of having
a balance sheet that balances it is incorrect.
Take the accounting equation property = property rights expanded to
assets = liabilities + equity
In the case of a net profit we incorrectly add the result to sum_dr,
our equity has increased afterall, so sum_cr should increase, (this
behaviour is correct, except the function is named wrong) however in
the case of a net loss we subtract the amount from sum_cr (which
should be sum_dr) which is incorrect as our equity has reduced.
However here is the first bug - sum_dr and sum_cr are around the wrong
way - sum_cr is increased for asset accounts, and sum_dr is increased
for liabilities - it should be the other way around
Put another way, for a balance sheet, we don't really want the totals
to be the sum of dr's and cr's, we want it to be the total of the
stuff on the left (Assets) and the total of the stuff on the right
(Property Rights).
So in the case of a Net Profit we must increase equity (credit) and in
the case of a net loss we must reduce equity (credit). At no point
should we be changing debits. The value of our Assets has not changed
(in so far that a net loss already reduces our assets), it is our
equity that has reduced.
Now to make this one step more confusing, and for some unknown reason
it has been decided to leave liabilities as a negative balance, and
then on the report use absolute value which is also incorrect. Many
assets and liabilities should have a balance opposite of the standard,
Accumulated depreciation for example in Assets, VAT Paid in
Liabilities, Bank Accounts temporarily in overdraft.
In my own parser, which I have written, to resolve this we declare a
dictionary called signs and at the point we compute the
account.balance we multiple it by the sign.
sign = {
'fixed_asset': 1,
'asset': 1,
'liability': -1,
'fixed_liability': -1,
'equity': -1,
}
We use more types than standard but you get the idea. Assets are
their balance, liability is their balance *-1.
Then all we do in the for account in accounts loop is make the
balance: account.balance * sign[typ]
So in summary
sum_dr and sum_cr are round the wrong way.
Adding a net loss to Assets is incorrect - it should be subtracted from Equity.
values (already reported bug) should not be absolute, but rather their inverse for liability and equity accounts.
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