0
我的OpenERP 7.0工作，我想重寫等被定義功能__compute如下：如何覆蓋在python中以兩個下劃線開頭的函數？
class account_account(osv.osv):
_name = "account.account"
_description = "Account"
def __compute(self, cr, uid, ids, field_names, arg=None, context=None,
query='', query_params=()):
""" compute the balance, debit and/or credit for the provided
account ids
Arguments:
`ids`: account ids
`field_names`: the fields to compute (a list of any of
'balance', 'debit' and 'credit')
`arg`: unused fields.function stuff
`query`: additional query filter (as a string)
`query_params`: parameters for the provided query string
(__compute will handle their escaping) as a
tuple
"""
mapping = {
'balance': "COALESCE(SUM(l.debit),0) - COALESCE(SUM(l.credit), 0) as balance",
'debit': "COALESCE(SUM(l.debit), 0) as debit",
'credit': "COALESCE(SUM(l.credit), 0) as credit",
# by convention, foreign_balance is 0 when the account has no secondary currency, because the amounts may be in different currencies
'foreign_balance': "(SELECT CASE WHEN currency_id IS NULL THEN 0 ELSE COALESCE(SUM(l.amount_currency), 0) END FROM account_account WHERE id IN (l.account_id)) as foreign_balance",
}
#get all the necessary accounts
children_and_consolidated = self._get_children_and_consol(cr, uid, ids, context=context)
#compute for each account the balance/debit/credit from the move lines
accounts = {}
res = {}
null_result = dict((fn, 0.0) for fn in field_names)
if children_and_consolidated:
aml_query = self.pool.get('account.move.line')._query_get(cr, uid, context=context)
wheres = [""]
if query.strip():
wheres.append(query.strip())
if aml_query.strip():
wheres.append(aml_query.strip())
filters = " AND ".join(wheres)
# IN might not work ideally in case there are too many
# children_and_consolidated, in that case join on a
# values() e.g.:
# SELECT l.account_id as id FROM account_move_line l
# INNER JOIN (VALUES (id1), (id2), (id3), ...) AS tmp (id)
# ON l.account_id = tmp.id
# or make _get_children_and_consol return a query and join on that
request = ("SELECT l.account_id as id, " +\
', '.join(mapping.values()) +
" FROM account_move_line l" \
" WHERE l.account_id IN %s " \
+ filters +
" GROUP BY l.account_id")
params = (tuple(children_and_consolidated),) + query_params
cr.execute(request, params)
for row in cr.dictfetchall():
accounts[row['id']] = row
# consolidate accounts with direct children
children_and_consolidated.reverse()
brs = list(self.browse(cr, uid, children_and_consolidated, context=context))
sums = {}
currency_obj = self.pool.get('res.currency')
while brs:
current = brs.pop(0)
for fn in field_names:
sums.setdefault(current.id, {})[fn] = accounts.get(current.id, {}).get(fn, 0.0)
for child in current.child_id:
if not child.active:
continue
if child.company_id.currency_id.id == current.company_id.currency_id.id:
try:
sums[current.id][fn] += sums[child.id][fn]
except:
sums[current.id][fn] += accounts.get(child.id, {}).get(fn, 0.0)
else:
sums[current.id][fn] += currency_obj.compute(cr, uid, child.company_id.currency_id.id, current.company_id.currency_id.id, sums[child.id][fn], context=context)
# as we have to relay on values computed before this is calculated separately than previous fields
if current.currency_id and current.exchange_rate and \
('adjusted_balance' in field_names or 'unrealized_gain_loss' in field_names):
# Computing Adjusted Balance and Unrealized Gains and losses
# Adjusted Balance = Foreign Balance/Exchange Rate
# Unrealized Gains and losses = Adjusted Balance - Balance
adj_bal = sums[current.id].get('foreign_balance', 0.0)/current.exchange_rate
sums[current.id].update({'adjusted_balance': adj_bal, 'unrealized_gain_loss': adj_bal - sums[current.id].get('balance', 0.0)})
for id in ids:
res[id] = sums.get(id, null_result)
else:
for id in ids:
res[id] = null_result
return res
account_account()
我讀到，當你想覆蓋雙下劃線的功能，你多一個下劃線前綴的方法名稱和定義類名如下：
def _account_account__compute(self, cr, uid, ids, field_names, arg=None, context=None,
query='', query_params=()):
但它不起作用。
謝謝你很多的你的解釋 –