来自不同集合的 sub-documents 个 ID 数组的 Mongoose 模式

Question

我有这样一个家庭的模式（他们 children 在学校就读）...

var familySchema = new Schema({
    parents: [{
        firstName: String,
        lastName: String,
        email: String,
    }],
    students: [{
        firstName: String,
        lastName: String,
        grade: Number,
    }]
});

我想描述很多学校都有教室，教室里有学生，像这样……

var schoolSchema = new Schema({
    name: String,
    street: String,
    classrooms: [{
        classroomNumber: Number,
        students: [ /* I am mixed up here */ ]
    }]
});

我如何告诉 mongoose 我想要在其他集合中找到的学生的 object 个 ID 数组？

我理解from this answer，如果我想让教室参考家庭文件，我可以这样说：

families: { type : ObjectId, ref: 'Family' }

但是我如何对另一个集合的 sub-documents 做同样的事情？（如果不是很明显，我只是在学习 mongo 和 mongoose）。

Answer 1

如果您想使用子文档reference，您需要更改对'student'数组的引用。

var studentSchema = new Schema({
    firstName: String,
    lastName: String,
    grade: Number,
});

var familySchema = new Schema({
    parents: [{
        firstName: String,
        lastName: String,
        email: String,
    }],
    students: [studentSchema]
});

var schoolSchema = new Schema({
    name: String,
    street: String,
    classrooms: [{
        classroomNumber: Number,
        students: [ { type: ObjectId, ref: 'Family.students' }]
    }]
});

var Student = mongoose.model('Student', studentSchema );  
var Family = mongoose.model('Family ', familySchema ); 
var School = mongoose.model('School', schoolSchema );

来自不同集合的 sub-documents 个 ID 数组的 Mongoose 模式

Mongoose schema for array of sub-documents ids from a different collection

javascript

mongoose

mongodb

mongoose-schema