I create a new model and override its write method, but when I create a new user, my override write is called.

Why happend that?

My class:

class Movimiento(models.Model):

_name = 'gestion_autos.movimiento'

name = fields.Char(string='Nombre')

product_id = fields.Many2one('product.template', string='Producto', required=True)

fecha = fields.Date(string='Fecha', default=fields.Date.today)

price_unit = fields.Float(string='Precio por unidad', required=True, default='1.0')

amount = fields.Float(string='Cantidad', required=True, default='1.0')

price_total = fields.Float(compute='_compute_price_total', string='Precio total',

store=True)

taxi_id = fields.Many2one('gestion_autos.taxi', string='Taxi',

required=True)

credito = fields.Boolean(default=False, string='Credito')

@api.depends('price_unit', 'amount')

def _compute_price_total(self):

for record in self:

if record.price_unit < 0.0:

record.price_unit = 0.0

if record.amount < 0.0:

record.amount = 0.0

record.price_total = record.price_unit * record.amount

class Gasto(Movimiento):

_name = 'gestion_autos.gasto'

partner_id = fields.Many2one('res.partner', string="Proveedor", required=True)

pago_ids = fields.One2many('gestion_autos.pagogasto', 'gasto_id', string="Pago")

@api.onchange('product_id')

def _onchange_product_id(self):

self.price_unit = self.product_id.standard_price

@api.model

def create(self, vals):

_logger.error("gasto - create - self : %r", self)

_logger.error("gasto - create - vals : %r", vals)

gasto_id = super(Gasto, self).create(vals)

if vals.get('credito') == False:

gasto_id.update_pay()

return gasto_id

@api.multi

def write(self, vals):

_logger.error("gasto - write - self : %r", self)

_logger.error("gasto - write - vals : %r", vals)

res = super(Gasto, self).write(vals)

if not res:

return res

pagos = self.env['gestion_autos.pagogasto'].search([('gasto_id.id', 'in', self.ids)])

pagos.unlink()

if vals.get('credito') == False:

self.update_pay()

return True

@api.one

def update_pay(self):

pagogasto_obj = self.env['gestion_autos.pagogasto']

res = pagogasto_obj.create({

'fecha':self.fecha,

'price':self.price_total,

'partner_id':self.partner_id.id,

'gasto_id':self.id,

'referencia':"Fac - %s - %s" % (self.fecha, self.partner_id.name)

})

return True

Output when create a new user:

2015-04-03 23:19:13,210 18132 ERROR newdb openerp.addons.gestion_autos.models.contabilidad: gasto - write - self : gestion_autos.gasto()

2015-04-03 23:19:13,210 18132 ERROR newdb openerp.addons.gestion_autos.models.contabilidad: gasto - write - vals : {'partner_id': 6}

2015-04-03 23:19:13,212 18132 ERROR newdb openerp.addons.gestion_autos.models.contabilidad: gasto - write - self : gestion_autos.gasto()

2015-04-03 23:19:13,212 18132 ERROR newdb openerp.addons.gestion_autos.models.contabilidad: gasto - write - vals : {'partner_id': False}

Please some explanation to that