I have a model, in this model: field "categorie" can be related to many item. I need to set values of field2 if field "categorie" changed, item is filtered, but i need to keep items filtered in field2.

Here is python code:

class class4(models.Model):
    _inherit = 'sale.order.line'
    categorie = fields.Many2one('module.categorie')
    item = fields.Many2one('module.item')
    # field1 = fields.Char(compute='change_domain')
    items = fields.Char(compute='change_domain')
    field2 = fields.Many2many('module.item')

    @api.one
    @api.onchange('categorie')
    def change_domain(self):
        print(" »»» call change_domain")
        res = {}
        list = []
        listChar = []
        records = self.env['module.categorieitem'].search([('name', '=', self.categorie.id)])
        for record in records:
            list.append(record.item.id)
        print('»»» set items value')
        for record in self:
            record.items = list
            print("items list: ",record.items)
        res['domain'] = {'item': [('id', 'in', list)]}
        return res

Here is xml code:

<record id="sale_order_line_form_inherited" model="ir.ui.view">
            <field name="name">sale_order.line.form.inherited</field>
            <field name="model">sale.order</field>
            <field name="inherit_id" ref="sale.view_order_form"/>
            <field name="arch" type="xml">
                <xpath expr="//tree//field[@name='name']" position="after">
                    <field name="categorie"/>
                    <!--<field name="item" domain="[('name','in',items)]" />-->
                    <field name="item" domain="[]"/>
                    <field name="items"/>
                    <!--<field name="field2"-->
                           <!--widget="many2many_tags"-->
                           <!--options="{'no_create_edit': True}"/>-->
                    <field name="field2"
                           widget="many2many_tags"
                           options="{'no_create_edit': True}"/>
                </xpath>
            </field>
        </record>