old_contents: # -*- coding: utf-8 -*-
  import os
  from openerp import models, fields, api
  import logging
  _logger = logging.getLogger(__name__)
  
  
  class database_backup(models.Model):
      _name = 'db.database.backup'
      _description = 'Database Backup'
      _order = "create_date desc"
  
      database_id = fields.Many2one(
          'db.database',
          string='Database',
          readonly=True,
          required=True
      )
      date = fields.Datetime(
          string='Date',
          readonly=True,
          required=True
      )
      name = fields.Char(
          string='Name',
          readonly=True,
          required=True
      )
      path = fields.Char(
          string='Path',
          readonly=True,
          required=True
      )
      full_path = fields.Char(
          string='Path',
          compute='get_full_path',
      )
      type = fields.Selection(
          [('manual', 'Manual'), ('daily', 'Daily'),
           ('weekly', 'Weekly'), ('monthly', 'Monthly')],
          string='Type',
          required=True
      )
  
      @api.one
      @api.depends('path', 'name')
      def get_full_path(self):
          self.full_path = os.path.join(self.path, self.name)
  
      @api.multi
      def unlink(self):
          try:
              os.remove(self.full_path)
          except Exception, e:
              _logger.warning(
                  'Unable to remoove database file on %s, this is what we get:\
                  \n %s' % (self.full_path, e.strerror))
          return super(database_backup, self).unlink()
  
new_contents: # -*- coding: utf-8 -*-
  import os
  from openerp import models, fields, api
  import logging
  _logger = logging.getLogger(__name__)
  
  
  class database_backup(models.Model):
      _name = 'db.database.backup'
      _description = 'Database Backup'
      _order = "create_date desc"
  
      database_id = fields.Many2one(
          'db.database',
          string='Database',
          readonly=True,
          required=True
      )
      date = fields.Datetime(
          string='Date',
          readonly=True,
          required=True
      )
      name = fields.Char(
          string='Name',
          readonly=True,
          required=True
      )
      path = fields.Char(
          string='Path',
          readonly=True,
          required=True
      )
      full_path = fields.Char(
          string='Path',
          compute='get_full_path',
      )
      type = fields.Selection(
          [('manual', 'Manual'), ('daily', 'Daily'),
           ('weekly', 'Weekly'), ('monthly', 'Monthly')],
          string='Type',
          required=True
      )
  
      @api.one
      @api.depends('path', 'name')
      def get_full_path(self):
          self.full_path = os.path.join(self.path, self.name)
  
      @api.multi
      def unlink(self):
          for backup in self:
              try:
                  os.remove(backup.full_path)
              except Exception, e:
                  _logger.warning(
                      'Unable to remoove database file on %s, this is what we get:\
                      \n %s' % (backup.full_path, e.strerror))
          return super(database_backup, self).unlink()
  
subject: FIX db backup