如何在猫鼬中加入 3 个集合

如何解决如何在猫鼬中加入 3 个集合

课程模式

const courseSchema = new mongoose.Schema(
{
    name: {
        type: String,trim: true,required: 'Course name is required'
    },logo: {
        type: String,default: ""
    },about: {
        type: String,required: 'Please fill in course description'
    },prerequisites: {
        type: [String],required: 'Course must have prerequisite info',validation: {validator: (prerequisite) => prerequisite.length,message: 'Course must have prerequisite info'}
    },materials:{
        type: [String],required: 'Course must have materials info',validation: {validator: (materials) => materials.length,message: 'Course must have materials info'}
    },price: {
        type: Number,required: 'Course should have price,input 0 for free courses',validation: {validator: (price)=>price>=0,message: 'Price should not be less than 0'}
    },rating: {
        type: Number,default: 0
    },countReview:{
      type : Number,default : 0
    },instructors: [{type: ObjectId,ref: "User"}],participants: [{ type: ObjectId,posts: [{type: ObjectId,ref: "Post"}],creator: {type: ObjectId,ref: "User"},syllabus : [{
        title : {type: String,trim: true},description : {type : String,trim : true},date : {type : Date}
    }],accessibility: {type: String,enum: ['private','public','protected'],default: 'private'}

},{timestamps: true}

)

强文本

const userSchema = new mongoose.Schema({
email: {
    type: String,lowercase: true,unique: true,required: "Email is required",validate: {
        validator: emailValidator,message: props => `${props.value} is not a valid email!`
    }
},otp: {type: String,otpValidUntil: {type: Date},active: {type: Boolean,default: false},name: {
    type: String,required: "Name is required",validate: {
        validator: (v) => {
            return (v.length > 4 && v.length < 15)
        },message: props => `${props.value} should be > 4 and <15 chars`
    }
},avatar: {
    type: String
},about: {
    type: String,default: ""
},linkedIn: {
    type: String,isAnorganization: {
    type: Boolean,default: false,required: "Organization field is required"
},isAnInstructor: {
    type: Boolean,required: "IsAnIstructor field is required"
},teachers: [
    {
        type: ObjectId,ref: "User"
    }
]

},

付款

const paymentSchema = new Schema(

{ 付款号码：{ 类型：字符串， 默认： ''， // required : "需要支付号码" },xendit_id：{ 类型：字符串， 默认： ''， },用户：{type：ObjectId，参考：“用户”}， 课程：{类型：ObjectId，参考：'课程'}， 发票网址：{ 类型：字符串， 默认 ： ''， // required : "发票 URL 是必需的" },地位 ： { 类型：字符串， 枚举：["PENDING","PAID","SETTLED","EXPIRED"],默认值：'待定'， // 必需：“需要状态” },blob_响应：{ 类型：字符串， 默认 ： ''， // 必需：“需要 Blob 响应” },外部 ID：{ 类型：字符串， 默认 ： ''， // 必需：“需要外部 ID” },到期日 ： { 类型：字符串， 默认 ： ''， // 必需：“需要截止日期” } },{时间戳：真} )

如何像这样预览数据

[

{ “_ID”： { "$oid": "60afb96f8a734f2f5c1b4f05" },"name": "学习反应！",“参与者”：[ { “_ID”： { "$oid": "60c946416310f0721222c3d9" },"name": "Silcer L","email": "[e-mail]",“彭巴亚兰”：[ [ { "状态": "已付款",“课程”： { "$oid": "60afb96f8a734f2f5c1b4f05" },“创建于”：{ "$date": "2021-06-16T01:07:35.938Z" } } ] ] },{ “_ID”： { "$oid": "60bcf8e4cc36555c6df57792" },"name": "六七","email": "[e-mail]",“创建于”：{ "$date": "2021-06-09T12:21:31.988Z" } } ] ] },