我想根据选择字段填充Many2one字段

from odoo import models, fields, api

class Model1(models.Model):
    _name = 'model1'
    
    name = fields.Char(string="Name")
    related_field = fields.Many2one('model2', string="Related Field")
    

class Model2(models.Model):
    _name = 'model2'
    
    name = fields.Char(string="Name")
    select_field = fields.Selection([
        ('option1', 'Option 1'),
        ('option2', 'Option 2'),
        ('option3', 'Option 3')
    ], string="Select Field")
    
    @api.onchange('select_field')
    def _onchange_select_field(self):
        if self.select_field == 'option1':
            self.env['model1'].browse(self._origin._context.get('active_id')).related_field = self.env['model2'].search([('name', '=', 'Option 1')], limit=1).id
        elif self.select_field == 'option2':
            self.env['model1'].browse(self._origin._context.get('active_id')).related_field = self.env['model2'].search([('name', '=', 'Option 2')], limit=1).id
        elif self.select_field == 'option3':
            self.env['model1'].browse(self._origin._context.get('active_id')).related_field = self.env['model2'].search([('name', '=', 'Option 3')], limit=1).id