How to add a field to sale order lines?

Question

I would like to add the "ship" field to the sale order lines as a drop down list (many2one field).

My xml file ship_view.xml:

<record model="ir.ui.view" id="ship_orderline">
    <field name="model">sale.order.line</field>
    <field name="name">sale.form</field>
    <field name="inherit_id" ref="sale.view_order_form"/>
    <field name="arch" type="xml">   
        <xpath expr="//field[@name='order_line']/tree/field[@name='product_uom_qty']" position="before">
            <field name="ship"/>
        </xpath>
    </field>
</record>

Answer 1

Try this belowing code. Check out that the model should be sale.order in the view:

Python code

from openerp import models, fields


class CustomSaleOrderLine(models.Model):
    _inherit = 'sale.order.line'

    ship = fields.Char(
        string='Ship',
    )

XML view

<record model="ir.ui.view" id="ship_orderline">
    <field name="model">sale.order</field>
    <field name="name">sale.order.form</field>
    <field name="inherit_id" ref="sale.view_order_form"/>
    <field name="arch" type="xml">  
        <xpath expr="//field[@name='order_line']/tree//field[@name='product_uom_qty']" position="before">
            <field name="ship"/>
        </xpath>
    </field>
</record>