node.js – Mongoose String to ObjectID

var comments = new scheR_972_11845@a({
    user_id:  { type: scheR_972_11845@a.Types.ObjectId,ref: 'users',required: [true,'No user id found']},post: { type: scheR_972_11845@a.Types.ObjectId,ref: 'posts','No post id found']}....

export let commentsModel: mongoose.Model<any> = mongoose.model("comments",comments);

let comment = new commentsModel;
str = 'Here my ObjectId code' //
comment.user_id = str;
comment.post = str;
comment.save();

var str = '578df3efb618f5141202a196';
    mongoose.mongo.bSONPure.objectID.fromHexString(str);//1
    mongoose.mongo.scheR_972_11845@a.objectId(str);//2
    mongoose.Types.ObjectId(str);//3

import * as mongoose from 'mongoose';

解决方法

import mongoose from 'mongoose';

之后,mongoose.Types.ObjectId将起作用：

import mongoose from 'mongoose';
console.log( mongoose.Types.ObjectId('578df3efb618f5141202a196') );

编辑：完整示例(使用mongoose@4.5.5测试)：

import mongoose from 'mongoose';

mongoose.connect('mongodb://localhost/test');

const scheR_972_11845@a = mongoose.scheR_972_11845@a;

var comments = new scheR_972_11845@a({
    user_id:  { type: scheR_972_11845@a.Types.ObjectId,'No post id found']}
});

const commentsModel = mongoose.model("comments",comments);

let comment = new commentsModel;
let str = '578df3efb618f5141202a196';
comment.user_id = str;
comment.post = str;
comment.save().then(() => console.log('saved'))
              .catch(e => console.log('Error',E));

数据库显示如下：

@H_446_7@mb:test$db.comments.find().pretty() { "_id" : ObjectId("578e5cbd5b080fbfb7bed3d0"),"post" : ObjectId("578df3efb618f5141202a196"),"user_id" : ObjectId("578df3efb618f5141202a196"),"__v" : 0 }