Hi, I am trying to add a new combobox to re.partner (added field for customers). It is intended to provide an informative payment method selection and it should appear right after property_payment_term in the customer acountability tab.

This is my __init__.py:

from . import invoice_payment_method

this is my __openerp__.py:

{
        'name': 'Payment Method Selection',
        'description': 'Provides a new field to select payment method as per customer',
        'author': 'E.M.',
        'depends': ['base', 'account' ],
        'data': ['invoice_payment_method.xml', ],
}

This is my invoice_payment_method.py:

# -*- coding: utf-8 -*-
from openerp import models, fields, api, exceptions

class invoice_payment_method(models.Model):

    _inherit = "res.partner"

    payment_method = fields.Selection(selection=[('bank_transfer', 'Transferencia Bancaria'),
                                                ('check', 'Cheque'),
                                                ('confirming', 'Confirming'),
                                                string='Método de pago')

And this is invoice_payment_method.xml:

<?xml version="1.0" encoding="utf-8"?>
<openerp>
  <data>

    <record model="ir.ui.view" id="payment_method">
        <field name="name">payment_method</field>
        <field name="model">res.partner</field>
        <field name="inherit_id" ref="account.view_partner_property_form"/>
        <field name="arch" type="xml"> 
           <xpath expr="//field[@name='property_payment_term']" position="after">
                <field name="payment_method"/>
            </xpath>
        </field>
    </record>

  </data>
</openerp>

Could anyone help me to identify what I am missing or how to further troubleshoot?