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113 lines
5.5 KiB
Python
113 lines
5.5 KiB
Python
# -*- encoding: utf-8 -*-
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##############################################################################
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#
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# Currency rate date check module for OpenERP
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# Copyright (C) 2012-2013 Akretion (http://www.akretion.com)
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# @author Alexis de Lattre <alexis.delattre@akretion.com>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Affero General Public License for more details.
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#
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# You should have received a copy of the GNU Affero General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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##############################################################################
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from openerp.osv import orm
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from datetime import datetime
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from openerp.tools.translate import _
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# Here are some explainations about the design of this module.
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# In server/openerp/addons/base/res/res_currency.py :
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# compute() -> _get_conversion_rate()
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# -> _current_rate() -> _current_rate_computation()
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# The date used for the rate is the one in the context
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# compute() adds currency_rate_type_from
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# and currency_rate_type_to to the context
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# _get_conversion_rate() adds currency_rate_type_id to context ;
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# its value is currency_rate_type_to ;
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# if it doesn't exist it's currency_rate_type_from ;
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# if it doesn't exist either it's False
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# It already contains raise "No rate found for currency ... at the date ..."
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# _current_rate() reads currency_rate_type_id
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# from context and uses it in the SQL request
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# This is the function used for the definition of
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# the field.function 'rate' on res_currency
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# Which one of the 3 functions should we inherit ? Good question...
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# It's probably better to inherit the lowest level function,
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# i.e. _current_rate_computation()
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# Advantage : by inheriting the lowest level function,
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# we can be sure that the check
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# always apply, even for scenarios where we
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# read the field "rate" of the obj currency
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# => that's the solution I implement in the code below
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class res_currency(orm.Model):
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_inherit = 'res.currency'
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def _current_rate_computation(self, cr, uid, ids, name, arg,
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raise_on_no_rate, context=None):
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if context is None:
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context = {}
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# We only do the check if there is an explicit date in the context and
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# there is no specific currency_rate_type_id
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if context.get('date') and not context.get('currency_rate_type_id') and\
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not context.get('disable_rate_date_check'):
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for currency_id in ids:
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# We could get the company from the currency, but it's not a
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# 'required' field, so we should probably continue to get it
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# from the user, shouldn't we ?
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user = self.pool['res.users'].browse(cr, uid, uid,
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context=context)
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# if it's the company currency, don't do anything
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# (there is just one old rate at 1.0)
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if user.company_id.currency_id.id == currency_id:
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continue
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else:
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# now we do the real work !
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date = context.get('date',
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datetime.today().strftime('%Y-%m-%d'))
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date_datetime = datetime.strptime(date, '%Y-%m-%d')
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rate_obj = self.pool['res.currency.rate']
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selected_rate = rate_obj.search(cr, uid, [
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('currency_id', '=', currency_id),
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('name', '<=', date),
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('currency_rate_type_id', '=', None)
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], order='name desc', limit=1, context=context)
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if not selected_rate:
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continue
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rate_date = rate_obj.read(cr, uid, selected_rate[0],
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['name'],
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context=context)['name']
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rate_date_datetime = datetime.strptime(rate_date,
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'%Y-%m-%d')
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max_delta = user.company_id.currency_rate_max_delta
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if (date_datetime - rate_date_datetime).days > max_delta:
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currency_name = self.read(cr, uid,
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currency_id,
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['name'],
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context=context)['name']
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raise orm.except_orm(
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_('Error'),
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_('You are requesting a rate conversion on %s for '
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'currency %s but the nearest '
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'rate before that date is '
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'dated %s and the maximum currency '
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'rate time delta for '
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'your company is %s days') % (
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date, currency_name, rate_date, max_delta)
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)
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# Now we call the regular function from the "base" module
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return super(res_currency, self)._current_rate_computation(
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cr, uid, ids, name, arg, raise_on_no_rate, context=context)
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