From efc52c89b449c170d79448409b7b98f3b71c82fe Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Tue, 6 Jan 2015 23:27:38 +0100
Subject: [PATCH] Add parameter price_decimal and price_digits

issue4438
review6791002
---
 CHANGELOG     |  3 +++
 doc/index.rst | 12 ++++++++++++
 product.py    | 15 +++++++++------
 3 files changed, 24 insertions(+), 6 deletions(-)

diff --git a/CHANGELOG b/CHANGELOG
index 3fcdd6ae2e..ea2c6a92c3 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,6 @@
+* Add price_digits
+* Add parameter price_decimal
+
 Version 3.4.0 - 2014-10-20
 * Bug fixes (see mercurial logs for details)
 
diff --git a/doc/index.rst b/doc/index.rst
index 2e9ab39720..7e62a9ffcf 100644
--- a/doc/index.rst
+++ b/doc/index.rst
@@ -61,3 +61,15 @@ The Product Template model contains the following fields:
 
 The Product model extend the Product Template with two fields: Code
 and Description.
+
+Configuration
+*************
+
+The product module uses the section `product` to retrieve some parameters:
+
+- `price_decimal`: defines the number of decimal with which the unit prices are
+  stored. The default value is `4`.
+
+.. warning::
+    It can not be lowered once a database is created.
+..
diff --git a/product.py b/product.py
index 1252e05a5a..991af06822 100644
--- a/product.py
+++ b/product.py
@@ -6,8 +6,9 @@ from trytond.transaction import Transaction
 from trytond.pool import Pool
 from trytond import backend
 from trytond.const import OPERATORS
+from trytond.config import config
 
-__all__ = ['Template', 'Product']
+__all__ = ['Template', 'Product', 'price_digits']
 
 STATES = {
     'readonly': ~Eval('active', True),
@@ -19,6 +20,8 @@ TYPES = [
     ('service', 'Service'),
     ]
 
+price_digits = (16, config.getint('product', 'price_decimal', 4))
+
 
 class Template(ModelSQL, ModelView):
     "Product Template"
@@ -36,9 +39,9 @@ class Template(ModelSQL, ModelView):
     category = fields.Many2One('product.category', 'Category',
         states=STATES, depends=DEPENDS)
     list_price = fields.Property(fields.Numeric('List Price', states=STATES,
-            digits=(16, 4), depends=DEPENDS, required=True))
-    cost_price = fields.Property(fields.Numeric('Cost Price',
-            states=STATES, digits=(16, 4), depends=DEPENDS, required=True))
+            digits=price_digits, depends=DEPENDS, required=True))
+    cost_price = fields.Property(fields.Numeric('Cost Price', states=STATES,
+            digits=price_digits, depends=DEPENDS, required=True))
     cost_price_method = fields.Property(fields.Selection([
                 ("fixed", "Fixed"),
                 ("average", "Average")
@@ -143,9 +146,9 @@ class Product(ModelSQL, ModelView):
     type = fields.Function(fields.Selection(TYPES, 'Type'),
         'on_change_with_type', searcher='search_type')
     list_price_uom = fields.Function(fields.Numeric('List Price',
-        digits=(16, 4)), 'get_price_uom')
+        digits=price_digits), 'get_price_uom')
     cost_price_uom = fields.Function(fields.Numeric('Cost Price',
-        digits=(16, 4)), 'get_price_uom')
+        digits=price_digits), 'get_price_uom')
 
     @classmethod
     def order_rec_name(cls, tables):