express+mongoose无限级分类查询(后端)

1. //菜单表
2. let menuSchema = new Schema({
3. title:String, //菜单名称
4. path:String,  //路由
5. level:Number,  //分类级别
6. pid:{  //父级菜单的_id
7. type:Schema.Types.ObjectId,
8. ref:"menu"
9.     }
10. })
11. 
12. let menuModel = mongoose.model("menu",menuSchema,"menu")

1. //添加一级菜单
2. menuModel.create({
3. title:"工作台",
4. path:"/workBack",
5. level:1
6. 
7. })
8. 
9. //添加二级菜单
10. menuModel.create({
11. title:"管理中心",
12. path:"/workBack/dashboard",
13. level:2,
14. pid:"63fca97066b73470f7c41b62"
15. })
16. 
17. //三级...以此类推

1. //获取全部菜单（测试接口）
2. //无限级查询全部菜单
3. router.get("/menuList", async (req, res) => {
4. let menus = await menuModel.find({}).lean()
5. let data = []
6. let jsonMenu = {}
7. 
8.     menus.forEach(item => {
9.         jsonMenu[item._id] = item
10.     })
11. 
12.     menus.forEach(item => {
13. if (!item["pid"]) {
14.             data.push(item)
15.         } else {
16. 
17. if (!jsonMenu[item["pid"]]["children"]) {
18.                 jsonMenu[item["pid"]]["children"] = []
19.             }
20. 
21.             jsonMenu[item["pid"]]["children"].push(item)
22.         }
23.     })
24. 
25.     res.send({
26. code: 200,
27. msg: "菜单获取成功",
28.         data
29.     })
30. })