擅长:python、mysql、java
<pre><code>class ResPartner(models.Model):
_inherit = 'res.partner'
vat = fields...(required=True) //just specify the required attributes
# but here i don't think it will work because the framework will not be able
# to add this constrains because it has some duplicated value all ready like null
# in order to make this work you need to run a query to modify old values then restart the server than odoo should be able to add this constraint check log message to see if the constraint is added
_sql_constraints = [
('vat_company_uniq', 'unique(company_id, vat)', '¡ El RIF debe ser único por compañia !'),
]
</code></pre>