[tryton] new fields in invoice

[Gmail - Iasmini]

Hello,

I added new fields in invoice, but they are not being added at the table 
and screen. For instance, field active:

1) invoice.py

# -*- coding: utf-8 -*-
from trytond.model import fields
from trytond.pool import PoolMeta

__metaclass__ = PoolMeta
__all__ = ['Invoice']


class Invoice:
    __name__ = 'account.invoice'

    active = fields.Boolean('Active', select=True)


2) invoice.xml

<?xml version="1.0"?>
<tryton>
    <data>
        <record model="ir.ui.view" id="view_invoice_nfse_form">
            <field name="model">account_invoice.invoice</field>
            <field name="inherit" ref="account_invoice.invoice_view_form"/>
            <field name="type">form</field>
            <field name="name">invoice_form</field>
        </record>
    </data>
</tryton>


3) __init__.py

from trytond.pool import Pool
from nfse_br import *
from company import *
from invoice import *


def register():
    Pool.register(
        NumeracaoRPS,
        NFSe,
        Company,
        NumeracaoRPSLine,
        Invoice,
        module='nfse_br', type_='model'
    )

4) invoice_form.xml

<?xml version="1.0"?>
<data>
    <xpath expr="/form/field[@name='invoice_address']" position='after'>
        <label name="active"/>
        <field name="active"/>
    </xpath>
</data>

5) tryton.cfg

[tryton]
version=2.9.0
depends:
    company
    currency
    ir
    party
    res
    digital_certificate
    company_silex
    account
    account_br
xml:
    nfse_br.xml
    company.xml
    invoice.xml


Can you help me, please?

--
Iasmini Gomes
Sílex Sistemas
iasm...@silexsistemas.com.br
www.silexsistemas.com.br