I want to add a field, job_ids, to res_partner in Odoo version 9. I added the field, restarted the Odoo service, and updated the app. However, the column does not appear in the database for res_partner, but it does for Jobs. If I add another column, like "test = fields.Char()" in res_partner it works. What is the issue with creating job_ids?

class res_partner(models.Model):

    _inherit = 'res.partner'

    job_ids = fields.One2many('fix_tribe.jobs', 'res_partner_id', string="Jobs")

class Jobs(models.Model):

    _name = 'fix_tribe.jobs'

    name = fields.Char()

    customer_id = fields.Many2one('fix_tribe.customers', string="Customer")

    res_partner_id = fields.Many2one('res.partner', string="ResPartner")

    isCompleted = fields.Boolean(string="Completed?")

    datetime_start = fields.Datetime(string="Start Date/Time")

    datetime_stop = fields.Datetime(string="Stop Date/Time")

    cost = fields.Float()

    jobitem_ids = fields.One2many('fix_tribe.job_items', 'name')