Hi,

I need to manage teachers in my app, then I did:

class CustomTeacher(models.Model):
    """Model to manage teachers"""
    _name = 'res.users'
    _inherit = 'res.users'
    instrument_ids = fields.Many2many(
        string='Instruments',
        comodel_name='custom.instrument',
        relation='custom_instrument_teacher_rel',
        column1='user_id',
        column2='instrument_id'
    )

Now, to show teachers in a TreeView:

<record id="view_custom_teacher_tree" model="ir.ui.view">
            <field name="name">custom.teacher.tree</field>
            <field name="model">res.users</field>
            <field name="priority" eval="8" />
            <field name="arch" type="xml">
                <tree string="teacher">
                    <field name="name"/>
                </tree>
            </field>
        </record>
<record model="ir.actions.act_window.view" id="act_open_custom_teacher_view_tree">
            <field name="act_window_id" ref="act_open_custom_teacher_view" />
            <field name="sequence" eval="10" />
            <field name="domain" eval="[('groups_id', 'in', ref('custom_teacher_group'))]" />
            <field name="view_mode">tree</field>
            <field name="view_id" ref="view_maifrance_teacher_tree" />
        </record>

I do not understand why users are not filtered, I still have all users instead of teachers only. 

Ant idea ?

Thanks