如何在 mongoose 模式中保存特定的 object

Question

我在這里遇到了一些問題，我嘗試只存儲一個 object 無論是學校還是大學還是工作，但是 mongoose 會自動創建另外兩個 object。

如何省略其他object。這里我應該使用default

let mySchema = new Schema({
    "type": { type: String, default: "" },  // school or college or work
    "school": {
        'name':{ type: String, default: "" },
        'parent':{ type: String, default: "" },
        'address':{ type: String, default: "" },
        'email_id':{ type: String, default: "" },
        'phone_no':{ type: String, default: "" },
    },
    "college": {
        'name':{ type: String, default: "" },
        'friend':{ type: String, default: "" },
        'address':{ type: String, default: "" },
        'email_id':{ type: String, default: "" },
        'phone_no':{ type: String, default: "" },
    },
    "work": {
        'name':{ type: String, default: "" },
        'colleague':{ type: String, default: "" },
        'address':{ type: String, default: "" },
        'email_id':{ type: String, default: "" },
        'phone_no':{ type: String, default: "" },
    },
});

Answer 1

是否有什么東西阻止你以編程方式設置它？

 const myType = "school"; // Just for example const mySchemaObj = { "type": { type: String, default: myType } }; mySchemaObj[myType] = { "school": { 'name':{ type: String, default: "" }, 'parent':{ type: String, default: "" }, 'address':{ type: String, default: "" }, 'email_id':{ type: String, default: "" }, 'phone_no':{ type: String, default: "" }, }, "college": { 'name':{ type: String, default: "" }, 'friend':{ type: String, default: "" }, 'address':{ type: String, default: "" }, 'email_id':{ type: String, default: "" }, 'phone_no':{ type: String, default: "" }, }, "work": { 'name':{ type: String, default: "" }, 'colleague':{ type: String, default: "" }, 'address':{ type: String, default: "" }, 'email_id':{ type: String, default: "" }, 'phone_no':{ type: String, default: "" }, } }[myType]; console.log(mySchemaObj); /* Then, later... let mySchema = new Schema(mySchemaObj); */

Answer 2

如果您從 Mongoose 文檔中查看此部分，您將看到 Mongoose 總是為嵌套文檔（例如school ）創建一個空的 object。

您可以改用子文檔，其中school 、 college和work是Schema的實例。

你可以做什么：

const mySchema = new Schema({
  school: new Schema({
    name: { type: String },
    parent: { type: String },
    address: { type: String },
    email_id: { type: String },
    phone_no: { type: String },
  }),
  college: new Schema({
    name: { type: String },
    friend: { type: String },
    address: { type: String },
    email_id: { type: String },
    phone_no: { type: String },
  }),
  work: new Schema({
    name: { type: String },
    colleague: { type: String },
    address: { type: String },
    email_id: { type: String },
    phone_no: { type: String },
  }),
});
const MyModel = mongoose.model('MyModel', mySchema);
const myDocument = new MyModel();
myDocument.college = { name: 'Harvard' };
await myDocument.save();