commit inicial

__init__.py

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+from . import sale_order_ean13

__openerp__.py

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+{
+    'name':'Sale Order Product ean13',
+    'description':"""
+Sale Order Product ean.
+=======================
+Show the ean13 field into sale order line, show field create_id and clean the view
+""",
+    'author': 'Eiru',
+    'website':'www.eiru.com',
+    'depends':['base','sale'],
+    'data':[
+        'sale_order_ean13_view.xml',
+    ],
+    'installable':True,
+}

sale_order_ean13.py

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+from openerp import models,api,fields
+
+class SaleOrderLine(models.Model):
+    _inherit = 'sale.order.line'
+    _name = 'sale.order.line'
+
+    ean13 = fields.Char(string="Codigo de Barras", compute="_get_ean13")
+
+    @api.one
+    @api.depends('product_id')
+    def _get_ean13(self):
+        self.ean13 = self.product_id.ean13

sale_order_ean13_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<openerp>
+    <data>
+        <record model="ir.ui.view" id="sale_order_ean13_view">
+            <field name="name">sale.order.ean13.view</field>
+            <field name="model">sale.order</field>
+            <field name="inherit_id" ref="sale.view_order_form"/>
+            <field name="arch" type="xml">
+                <xpath expr="//tree/field[@name='product_id']" position="after">
+                    <field name="ean13"/>
+                </xpath>
+            </field>
+        </record>
+   </data>
+</openerp>