odoo-test/models/hostel_room_category.py

from odoo import fields, models

class hostelCategory(models.Model):
    _name = "hostel.room.category"
    _description = "宿舍房间类别"

    name = fields.Char("类别名称")
    description = fields.Text("描述")
    parent_id = fields.Many2one("hostel.room.category", string="父类别",ondelete="restrict", index=True)
    child_ids = fields.One2many("hostel.room.category", "parent_id", string="子类别")
    
    def create_categories(self):
        categ1 = {
            'name':'child category1',
            'description': "description for child 1"
        }
        categ2 = {
            'name':'child category2',
            'description': "description for child 2"
        
        }
        parent_categ = {
            'name' : "parent category",
            'description': "description for parent category",
            'child_ids': [(0, 0, categ1), (0, 0, categ2)]
        }
        self.env['hostel.room.category'].create(parent_categ)
        return True