Hello

I'm developing a module that insert some columns to the product.attribute and product.attribute.value, but when i make a product with 2 variants itś get not available on the e-shop. This doesn happen without my module installed.

My code:

class product_colorisa_attribute(osv.osv):
    _inherit = "product.attribute.value"
    _columns = {
        'code' : fields.char('Codigo', size=3, required=True, help="Campo con capacidad de 3 caracteres, pero segun definicion de la codificacion de los productos ingresar unicamente 2 en caso de catalogar un Color, Sabor."),
        'scode' : fields.char('Sub Codigo', size=2, required=False, help="")
    }

class product_product(osv.osv):
    _inherit = 'product.product'
      
    def get_ref(self, cr, uid, ids,context=None):
        if isinstance(ids, (list, tuple)) and not len(ids):
            return []
        if isinstance(ids, (long, int)):
            ids = [ids]
        reads = self.browse(cr, uid, ids)
        res = []
        for records in reads:
            if records.categ_id.code:
                ref = records.categ_id.code + '' + records.linea_id.code + '' + records.marca_id.code
                for attribute in records.attribute_value_ids:
                    print attribute.code
                    if attribute.code:
                        ref = ref + '' + attribute.code
                if ref:
                    print ref
                    res.append((records['id'], ref))
        return res
        
    
    def _get_ref(self, cr, uid, ids, prop, unknow_none, context=None):
        res = self.get_ref(cr, uid, ids, context=context)
        return dict(res)

 _columns = {
        'ref' : fields.function(_get_ref, type='char', string='Internal Reference', store=True ),

}

Thanks for anything and forgive my english