Read selection values from sale model

issue6206
review31961002

configuration.py

@@ -1,6 +1,7 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
 from trytond.model import ModelView, ModelSQL, ModelSingleton, fields
+from trytond.pool import Pool
 from trytond.pyson import Eval, Bool
 
 __all__ = ['Configuration']
@@ -15,17 +16,27 @@ class Configuration(ModelSingleton, ModelSQL, ModelView):
                     [Eval('context', {}).get('company', -1), None]),
                 ('code', '=', 'sale.sale'),
                 ], required=True))
-    sale_invoice_method = fields.Property(fields.Selection([
-                ('manual', 'Manual'),
-                ('order', 'On Order Processed'),
-                ('shipment', 'On Shipment Sent')
-                ], 'Sale Invoice Method', states={
+    sale_invoice_method = fields.Property(fields.Selection(
+            'get_sale_invoice_methods', 'Sale Invoice Method',
+            states={
                 'required': Bool(Eval('context', {}).get('company')),
                 }))
-    sale_shipment_method = fields.Property(fields.Selection([
-                ('manual', 'Manual'),
-                ('order', 'On Order Processed'),
-                ('invoice', 'On Invoice Paid'),
-                ], 'Sale Shipment Method', states={
+    sale_shipment_method = fields.Property(fields.Selection(
+            'get_sale_shipment_methods', 'Sale Shipment Method',
+            states={
                 'required': Bool(Eval('context', {}).get('company')),
                 }))
+
+    @classmethod
+    def get_sale_invoice_methods(cls):
+        pool = Pool()
+        Sale = pool.get('sale.sale')
+        field_name = 'invoice_method'
+        return Sale.fields_get([field_name])[field_name]['selection']
+
+    @classmethod
+    def get_sale_shipment_methods(cls):
+        pool = Pool()
+        Sale = pool.get('sale.sale')
+        field_name = 'shipment_method'
+        return Sale.fields_get([field_name])[field_name]['selection']