Odoo13_多選下拉框

1.models.py

    mood = fields.Many2many('mood', string='主要基調')

class mood(models.Model):
    _name = 'mood'
    _description = '主要基調'

    name = fields.Char('基調', required=True)  # 必填
    ext = fields.Char(string='擴展id', default='0')

2.views.xml

                            <field name="mood" widget="many2many_tags"/>