Полагаю, проблема в том, какой тип поля вы выберете fields.Many2one.Это должно быть м2м типа.У меня есть похожий пример для вас.
<!--course-->
<record model="ir.ui.view" id="course_form_view">
<field name="name">course.form</field>
<field name="model">openacademy.course</field>
<field name="arch" type="xml">
<form string="Course Form">
<sheet>
<group>
<field name="name"/>
<field name="responsible_id"/>
</group>
<notebook>
<page string="Description">
<field name="description"/>
</page>
<page string="Sessions">
<field name="session_ids">
<tree string="Registered sessions">
<field name="name"/>
<field name="instructor_id"/>
</tree>
</field>
</page>
<page string="About">
This is an example of notebooks
</page>
</notebook>
</sheet>
</form>
</field>
</record>
<!--session-->
<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">
<header>
<button name="action_draft" type="object" string="Reset to draft" states="confirmed,done"/>
<button name="action_confirm" type="object" string="Confirm" states="draft" class="oe_highlight"/>
<button name="action_done" type="object" string="Mark as done" states="confirmed" class="oe_highlight"/>
<field name="state" widget="statusbar"/>
</header>
<sheet>
<group string="General">
<field name="course_id" options="{'limit': 3}"/>
<field name="name"/>
<field name="instructor_id"/>
<field name="active"/>
</group>
<group string="Schedule">
<field name="start_date"/>
<field name="duration"/>
<field name="seats"/>
<field name="taken_seats" widget="progressbar"/>
<!--<button type="action" name="%(launch_session_wizard)d" string="wizard" class="oe_highlight"/>-->
</group>
<label for="attendee_ids"/>
<field name="attendee_ids"/>
</sheet>
</form>
</field>
</record>
class Course(models.Model):
_name = 'openacademy.course'
name = fields.Char(string="Title", required=True)
description = fields.Text()
responsible_id = fields.Many2one('res.users', ondelete='set null', string="Responsible", index=True)
session_ids = fields.One2many('openacademy.session', 'course_id', string="Sessions")
# 去改寫action的Duplicate
@api.multi
def copy(self, default=None):
default = dict(default or {})
copied_count = self.search_count([('name', '=like', u"Copy of {}%".format(self.name))])
if not copied_count:
new_name = u"Copy of {}".format(self.name)
else:
new_name = u"Copy of {} ({})".format(self.name, copied_count)
default['name'] = new_name
return super(Course, self).copy(default)
# unlink 是 改寫Action的Delete
_sql_constraints = [
('name_description_check',
'CHECK(name != description)',
"The title of the course should not be the description"),
('name_unique',
'UNIQUE(name)',
"The course title must be unique"),
]
class Session(models.Model):
_name = 'openacademy.session'
name = fields.Char(required=True)
start_date = fields.Date(default=fields.Date.today)
duration = fields.Float(digits=(6, 2), help="Duration in days")
seats = fields.Integer(string="Number of seats")
active = fields.Boolean(default=True)
color = fields.Integer()
instructor_id = fields.Many2one('res.partner', string="Instructor", domain=['|', ('instructor', '=', True), ('category_id.name', 'ilike', "Teacher")])
course_id = fields.Many2one('openacademy.course', ondelete='cascade', string="Course", required=True)
attendee_ids = fields.Many2many('res.partner', string="Attendees")
taken_seats = fields.Float(string="Taken seats", compute='_taken_seats')
end_date = fields.Date(string="End Date", store=True, compute='_get_end_date', inverse='_set_end_date')
hours = fields.Float(string="Duration in hours", compute='_get_hours', inverse='_set_hours')
attendees_count = fields.Integer(string="Attendees count", compute='_get_attendees_count', store=True)
state = fields.Selection([('draft', "Draft"),('confirmed', "Confirmed"),('done', "Done"),], default='draft')
@api.multi
def action_draft(self):
self.state = 'draft'
@api.multi
def action_confirm(self):
self.state = 'confirmed'
@api.multi
def action_done(self):
self.state = 'done'
@api.depends('seats', 'attendee_ids')
def _taken_seats(self):
for r in self:
if not r.seats:
r.taken_seats = 0.0
else:
r.taken_seats = 100.0 * len(r.attendee_ids) / r.seats
@api.depends('attendee_ids')
def _get_attendees_count(self):
for r in self:
r.attendees_count = len(r.attendee_ids)
@api.depends('duration')
def _get_hours(self):
for r in self:
r.hours = r.duration * 24
def _set_hours(self):
for r in self:
r.duration = r.hours / 24
@api.depends('start_date', 'duration')
def _get_end_date(self):
for r in self:
if not (r.start_date and r.duration):
r.end_date = r.start_date
continue
start = fields.Datetime.from_string(r.start_date)
duration = timedelta(days=r.duration, seconds=-1)
r.end_date = start + duration
def _set_end_date(self):
for r in self:
if not (r.start_date and r.end_date):
continue
start_date = fields.Datetime.from_string(r.start_date)
end_date = fields.Datetime.from_string(r.end_date)
r.duration = (end_date - start_date).days + 1
@api.onchange('seats', 'attendee_ids')
def _verify_valid_seats(self):
if self.seats < 0:
return {
'warning': {
'title': "Incorrect 'seats' value",
'message': "The number of available seats may not be negative",
},
}
if self.seats < len(self.attendee_ids):
return {
'warning': {
'title': "Too many attendees",
'message': "Increase seats or remove excess attendees",
},
}
@api.constrains('instructor_id', 'attendee_ids')
def _check_instructor_not_in_attendees(self):
for r in self:
if r.instructor_id and r.instructor_id in r.attendee_ids:
raise exceptions.ValidationError("A session's instructor can't be an attendee")