Node.js 如何在mongoose中将信息从一个集合检索到另一个集合?
我有一个学生收集当我想报告一个特定的学生与 studentId报告必须与studentId一起存储在报告集合中 还有我的报告。我想用个人收藏 这是学生模式 //创建一个模式Node.js 如何在mongoose中将信息从一个集合检索到另一个集合?,node.js,mongodb,mongoose-schema,Node.js,Mongodb,Mongoose Schema,我有一个学生收集当我想报告一个特定的学生与 studentId报告必须与studentId一起存储在报告集合中 还有我的报告。我想用个人收藏 这是学生模式 //创建一个模式 var studentSchema = new Schema({ name: { type: String, required: true }, dateofbirth: { type:
var studentSchema = new Schema({
name: {
type: String,
required: true
},
dateofbirth: {
type: Date,
required: true
},
schoolname:
{
type:String,
required:true
},
standard:
{
type: Number,
required:true
}
}, {
timestamps: true
});
下面是报告模式
那个么,我怎样才能从学生收藏中检索StudeID呢?我怎样才能给一个特定的学生做报告呢
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var studentSchema = new Schema({
name: {type: String, required: true},
dateofbirth: {type: Date, required: true},
schoolname: {type:String, required:true},
standard: {type: Number, required:true},
timestamps: true
});
var reportSchema = new Schema({
date: {type:Date,required:true},
comment: {type:String,required:true}
timestamps: true,
student_id: [{type: String, ref:'student',required: true}] //store your student{_id} relation here ref ==> is just a Collection name
});
mongoose.connect('mongodb://localhost/your_db_name_here', {
// using mongoose client to avoid promises exception
useMongoClient: true,
});
//just making your collection available to next controller.js file
module.exports= {
student : mongoose.model('student',studentSchema ),
report: mongoose.model('report', reportSchema)
};
controller.js我一直在用express.js处理你的案子
你的答案在这里
这是
不过,如果你有关于猫鼬或mean stack means kinldy的其他基本信息,请参阅
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var reportSchema = new Schema({
date: {
type:Date,
required:true
},
comment:
{
type:String,
required:true
}
},
{
timestamps: true
});
var Report = mongoose.model('report', reportSchema);
module.exports = Report;
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var studentSchema = new Schema({
name: {type: String, required: true},
dateofbirth: {type: Date, required: true},
schoolname: {type:String, required:true},
standard: {type: Number, required:true},
timestamps: true
});
var reportSchema = new Schema({
date: {type:Date,required:true},
comment: {type:String,required:true}
timestamps: true,
student_id: [{type: String, ref:'student',required: true}] //store your student{_id} relation here ref ==> is just a Collection name
});
mongoose.connect('mongodb://localhost/your_db_name_here', {
// using mongoose client to avoid promises exception
useMongoClient: true,
});
//just making your collection available to next controller.js file
module.exports= {
student : mongoose.model('student',studentSchema ),
report: mongoose.model('report', reportSchema)
};
var db = require("./db.js");
var app = require("express")();
app.post("/api/student/register", (req, res) => {
var dbdata = {
name: req.body.name,
.......
}
db.student.create(dbdata, (er, callback) => {
if(er)return res.json("error");
return res.json("successfully inserted");
});
});
app.post("/api/student/report/create", (req, res) => {
//while creating a report you have to pass a Student primary key
var dbdata = {
date: req.body.data;
comment: req.body.comment,
student_id: req.body.student_id
// similar to foreign key relation ship}
}
db.report.create(dbdata, function(er, callback){
if(er)return res.json("err");
return res.json("successfully inserted");
});
});
app.post("/particular/student/report", function(req, res){
db.report.find({student_id:"your student id here"}).populate('student_id').exec(function(err, data){
if(err)return res.json("db exception");
return res.json(data); //you will get all your student report for the particular student
});
});