问Compute方法赋值失败- Odoo 14

EN

@api.depends('user_id')
    @api.model
    def _get_assigned_project(self):
        today = fields.Date.today()
        for employee in self:
            project_task = self.env['project.task'].search([('user_id','=',employee.user_id.id),
                                                                ('status','=','assigned'),
                                                                ('date_end','>',today),
                                                                ('project_id.original_project_id', '=', False)], order='date_end desc', limit=1)
            if project_task:
                employee.project_name = project_task.project_id.display_name
                if project_task.project_id.role_id.name = 'Delivery Manager' and employee.base_manager != 0:
                    employee.parent_id = project_task.project_id.delivery_director.id
                else:
                    employee.parent_id = project_task.project_id.delivery_manager.id
            else: 
                employee.project_name = ""
                if employee.base_manager != 0:
                    employee.parent_id = employee.base_manager

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/odoo/src/odoo/odoo/http.py", line 640, in _handle_exception
    return super(JsonRequest, self)._handle_exception(exception)
  File "/home/odoo/src/odoo/odoo/http.py", line 316, in _handle_exception
    raise exception.with_traceback(None) from new_cause
ValueError: Compute method failed to assign hr.employee(266,).project_name