You can follow this: https://youtu.be/XGqXEL2qQmE

Hope it helps,

Thanks

Hi,

You can define a domain according to the value of another field in the form view by using the dynamic domain, you can refer to the following code for how to use a dynamic domain.
field_1 = fields.Many2many('project.task.type')field_2 = fields.Many2one('project.task.type', domain="[('id', 'in', stage_ids)]")

    @api.onchange('project_id')
    def _onchange_project_id(self):
        data = []
        for rec in self.env['project.task.type'].search([]):
            if self.project_id.id in rec.project_ids.ids:
                data.append(rec.id)
        self.field_1 = data

in the above code, the value for the field field_2 will be shown based on the value field_1.

Hope it helps