Add module account_invoice_margin

account_invoice_margin/account_invoice.py

@@ -0,0 +1,124 @@
+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Account Invoice Margin module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from openerp import models, fields, api
+import openerp.addons.decimal_precision as dp
+
+
+class AccountInvoiceLine(models.Model):
+    _inherit = 'account.invoice.line'
+
+    standard_price_company_currency = fields.Float(
+        string='Cost Price in Company Currency', readonly=True,
+        digits=dp.get_precision('Product Price'))
+    standard_price_invoice_currency = fields.Float(
+        string='Cost Price in Invoice Currency', readonly=True,
+        compute='_compute_margin', store=True,
+        digits=dp.get_precision('Account'))
+    margin_invoice_currency = fields.Float(
+        string='Margin in Invoice Currency', readonly=True, store=True,
+        compute='_compute_margin',
+        digits=dp.get_precision('Account'))
+    margin_company_currency = fields.Float(
+        string='Margin in Company Currency', readonly=True, store=True,
+        compute='_compute_margin',
+        digits=dp.get_precision('Account'))
+
+    @api.one
+    @api.depends(
+        'standard_price_company_currency', 'invoice_id.currency_id',
+        'invoice_id.move_id',
+        'invoice_id.date_invoice', 'quantity', 'price_subtotal')
+    def _compute_margin(self):
+        standard_price_inv_cur = 0.0
+        margin_inv_cur = 0.0
+        margin_comp_cur = 0.0
+        if self.invoice_id:
+            # it works in _get_current_rate
+            # even if we set date = False in context
+            standard_price_inv_cur =\
+                self.invoice_id.company_id.currency_id.with_context(
+                    date=self.invoice_id.date_invoice).compute(
+                        self.standard_price_company_currency,
+                        self.invoice_id.currency_id)
+            margin_inv_cur =\
+                self.price_subtotal - self.quantity * standard_price_inv_cur
+            margin_comp_cur = self.invoice_id.currency_id.with_context(
+                date=self.invoice_id.date_invoice).compute(
+                    margin_inv_cur, self.invoice_id.company_id.currency_id)
+        self.standard_price_invoice_currency = standard_price_inv_cur
+        self.margin_invoice_currency = margin_inv_cur
+        self.margin_company_currency = margin_comp_cur
+
+    # We want to copy standard_price on invoice line for customer
+    # invoice/refunds. We can't do that via on_change of product_id,
+    # because it is not always played when invoice is created from code
+    # => we inherit write/create
+    # We write standard_price_company_currency even on supplier invoice/refunds
+    # because we don't have access to the 'type' of the invoice
+    @api.model
+    def create(self, vals):
+        if vals.get('product_id'):
+            pp = self.env['product.product'].browse(vals['product_id'])
+            vals['standard_price_company_currency'] = pp.standard_price
+        return super(AccountInvoiceLine, self).create(vals)
+
+    @api.multi
+    def write(self, vals):
+        if vals.get('product_id'):
+            pp = self.env['product.product'].browse(vals['product_id'])
+            vals['standard_price_company_currency'] = pp.standard_price
+        return super(AccountInvoiceLine, self).write(vals)
+
+
+class AccountInvoice(models.Model):
+    _inherit = 'account.invoice'
+
+    margin_invoice_currency = fields.Float(
+        string='Margin in Invoice Currency',
+        readonly=True, compute='_compute_margin', store=True,
+        digits=dp.get_precision('Account'))
+    margin_company_currency = fields.Float(
+        string='Margin in Company Currency',
+        readonly=True, compute='_compute_margin', store=True,
+        digits=dp.get_precision('Account'))
+
+    @api.one
+    @api.depends(
+        'currency_id', 'date_invoice', 'type', 'move_id',
+        'invoice_line.margin_invoice_currency',
+        'invoice_line.margin_company_currency')
+    # I invalidate on move_id because the currency rate used for accounting
+    # entries is the currency rate available on invoice validation, so when
+    # the move_id field is written
+    def _compute_margin(self):
+        margin_inv_cur = 0.0
+        margin_comp_cur = 0.0
+        if self.type in ('out_invoice', 'out_refund'):
+            for il in self.invoice_line:
+                margin_inv_cur += il.margin_invoice_currency
+                margin_comp_cur += il.margin_company_currency
+        if self.type == 'out_refund':
+            margin_inv_cur *= -1
+            margin_comp_cur *= -1
+        self.margin_invoice_currency = margin_inv_cur
+        self.margin_company_currency = margin_comp_cur