Hi All,

I have problem as follows,

I Add a computed field and it was working fine 

and suddenly it gives me error

My .py Code

from datetime import timedeltafrom odoo import models, fields, api, exceptionsclass Session(models.Model):    _name = "openacademy.session"    name = fields.Char(string="Session Name", required=True)    start_date = fields.Date(default=fields.Date.today)    duration = fields.Float(digits=(6,2), help="Duration in days")    seats = fields.Integer(string="No Of Seats")    active = fields.Boolean(default=True)    instructor_id = fields.Many2one('res.partner', ondelete='set null',                                    string='Instructor',                    domain=['|',                     ('instructor', '=', True),                     ('category_id.name', 'ilike', 'teacher')])    course_id = fields.Many2one('openacademy.course', string='Course',                                ondelete='cascade', required=True)    attendee_ids = fields.Many2many("res.partner", string="Attendees")    end_date = fields.Date(string="End Date", store=True,                           compute='_get_end_date', inverse="_set_end_date")    taken_seats = fields.Float(string="Taken seats", compute='_taken_seats')@api.depends('seats', 'attendee_ids')def _taken_seats(self):    for r in self:        r.taken_seats = 100.0 * len(r.attendee_ids) / r.seats

and my XML Code

<odoo>    <!-- Create Form View  -->    <record model="ir.ui.view" id="session_form_view">        <field name="name">Session.Form</field>        <field name="model">openacademy.session</field>        <field name="arch" type="xml">            <form string="Session Form">                <sheet>                    <group string="General">                        <field name="course_id"/>                        <field name="name"/>                        <field name="instructor_id"/>                        <field name="active"/>                    </group>                    <group string="Schedule">                        <field name="start_date"/>                         <field name="duration"/>                        <field name="end_date"/>                        <field name="seats"/>                       <field name="taken_seats" widget="progressbar"/>                    </group>                    <label for="attendee_ids"/>                    <field name="attendee_ids"/>                </sheet>            </form>        </field>    </record>    <!-- Create Tree View  -->    <record model="ir.ui.view" id="session_tree_view">        <field name="name">Session.Tree</field>        <field name="model">openacademy.session</field>        <field name="arch" type="xml">            <tree string="Session Tree">                <field name="course_id"/>                <field name="name"/>                <field name="instructor_id"/>                <field name="start_date"/>                 <field name="end_date"/>                <field name="duration"/>                <field name="active"/>                <field name="seats"/>                  <field name="taken_seats" widget="progressbar"/>            </tree>        </field>    </record> <!-- calendar view -->        <record model="ir.ui.view" id="session_calendar_view">            <field name="name">session.calendar</field>            <field name="model">openacademy.session</field>            <field name="arch" type="xml">                <calendar string="Session Calendar" date_start="start_date" date_stop="end_date" color="instructor_id">                    <field name="name"/>                </calendar>            </field>        </record>    <!-- Create Action-->    <record model="ir.actions.act_window" id="session_list_action">        <field name="name">Sessions</field>        <field name="res_model">openacademy.session</field>        <field name="view_type">form</field>        <field name="view_mode">tree,form,calendar</field>    </record>    <!-- Create Menu Item -->    <menuitem id="session_menu" parent="Setting_menu" name="Sessions" action="session_list_action"/></odoo>

and this is the error

  File "E:\odoo-11.0\odoo\fields.py", line 1081, in determine_inverse
    getattr(records, self.inverse)()
AttributeError: 'openacademy.session' object has no attribute '_set_end_date'