In odoo 9 (in you have you odoo server in other directory, just change the path to you odoo directory installation)

Create a new custom module:

cd /odoo/odoo-server <--Here inside is the odoo.py script to create a new custom module.

sudo ./odoo.py scaffold myfieldsinsaleorder /odoo/custom/addons <--This is my directory for my custom modules, this code create a new custom module

cd /odoo/custom/addons/myfieldsinsaleorder

Edit __openerp__.py and save this settings:

locate: 'depends': ['base'], and add 'sale' and 'product' like this:

'depends': ['base','sale','product'],

Edit models.py and save this settings: <-- here you can add your custom fields

from openerp import models, fields, api

class myfieldsinsaleorder(models.Model):

_inherit = 'sale.order'

mycustomfield1 = fields.Char('My custom field 1 Label', default = 'My custom field 1 default value')

Edit templates.xml and save this settings: <-- here you can add the custom field to sale order form and print to sale order quotation document

 <openerp>

<data>

<record id="my_view_saleorder_form_inherit" model="ir.ui.view">

<field name="name">my.view.saleorder.form.inherit</field>

<field name="model">sale.order</field>

<field name="inherit_id" ref="sale.view_order_form"/>

<field name="arch" type="xml">

<!-- Locate the position to add a new tab "My New Tab" in "Form View Sale Order"-->

<xpath expr="//page[1]" position="after">

<page string="My New Tab">

<group>

<!-- here we add our new field "mycustomfield1" inside our new tab -->

<field name="mycustomfield1"/>

</group>

</page>

</xpath>

</field>

</record>

<!-- This is to add our field in the quotation saler order and print -->

<template id="my_report_saleorder_document" inherit_id="sale.report_saleorder_document">

<xpath expr="//table[@class='table table-condensed']" position="after">

<strong>My label field for quotation sale order: </strong><span t-field="doc.mycustomfield1"/><br></br>

<!-- with this code we can add fields from other module (products) to sale order document and print -->

<strong>Field get it from product module: </strong><span t-field="doc.product_id.product_tmpl_id.warranty"/>

</xpath>

</template>

 </data>

</openerp>

HI,

You can create custom field in Sale order by creating a module or from GUI.

From GUI, you can add the custom field using menu: Settings > Technical > Database Structure > Fields (Make sure the user has 'Technical Features' enabled in their access rights) To make them show up on the UI itself you will then need to add them to a view (Settings > Technical > User Interface > Views).

Hi,

You need to create 2 files: a xml- and a py-file. The example below shows how to add a field 'MRSP' to the product form.

Content of the py-file

class product_product(osv.osv):
    _inherit = "product.product"

    _columns = {
                'mrsp': fields.float('MRSP', digits_compute=dp.get_precision('Product Price'),
                                    help="The Manufacturer Recommended Sales Price."),
    }

product_product()

Example content of the xml-file (this depends heavily on where and how you want to put the field, so I can't be more specific; use existing xml files as inspiration)

<record id="product_mrsp_form_view" model="ir.ui.view">
    <field name="name">product.normal.form</field>
    <field name="model">product.product</field>
    <field name="inherit_id" ref="product.product_normal_form_view"/>
    <field eval="7" name="priority"/>
    <field name="arch" type="xml">
               <field name="mrsp" attrs="{'invisible': [('sale_ok', '!=', True)]}"/>
    </field>
</record>

You of course need to add these files in __init__ and __openerp__

Bart

It is Better If You Use Odoo Studio for Customisation. 

I need create with new module, i don't want after update lose everything

Hi ,

tutorial link : http://maheshwarimayur.blogspot.in/2013/02/how-to-add-new-field-on-any-object-in.html

Hope it helps you more !