node.js 猫鼬字符串到 ObjectID
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Mongoose String to ObjectID
提问by Melixion
i have string with ObjectId .
我有 ObjectId 的字符串。
var comments = new Schema({
user_id: { type: Schema.Types.ObjectId, ref: 'users',required: [true,'No user id found']},
post: { type: Schema.Types.ObjectId, ref: 'posts',required: [true,'No post id found']}....
export let commentsModel: mongoose.Model<any> = mongoose.model("comments", comments);
How i user it:
我如何使用它：
let comment = new commentsModel;
str = 'Here my ObjectId code' //
comment.user_id = str;
comment.post = str;
comment.save();
When I create a "comment" model and assign a string user_id value or post I have an error when saving. I make console.log(comment)all data is assigned to vars.
当我创建一个“评论”模型并分配一个字符串 user_id 值或发布时，我在保存时出错。我将console.log(comment)所有数据分配给 vars。
I try:
我尝试：
var str = '578df3efb618f5141202a196';
mongoose.mongo.BSONPure.ObjectID.fromHexString(str);//1
mongoose.mongo.Schema.ObjectId(str);//2
mongoose.Types.ObjectId(str);//3
- TypeError: Object function ObjectID(id) {
- TypeError: Cannot call method 'ObjectId' of undefined
- TypeError: Cannot read property 'ObjectId' of undefined
- 类型错误：对象函数 ObjectID(id) {
- 类型错误：无法调用未定义的方法“ObjectId”
- 类型错误：无法读取未定义的属性“ObjectId”
And of course I included the mongoose BEFORE ALL CALLS
当然，我在所有通话之前都包括了猫鼬
import * as mongoose from 'mongoose';
nothing works.
没有任何效果。
回答by robertklep
You want to use the default export:
您想使用默认导出：
import mongoose from 'mongoose';
After that, mongoose.Types.ObjectIdwill work:
之后，mongoose.Types.ObjectId将工作：
import mongoose from 'mongoose';
console.log( mongoose.Types.ObjectId('578df3efb618f5141202a196') );
EDIT:full example (tested with [email protected]):
编辑：完整示例（用 测试[email protected]）：
import mongoose from 'mongoose';
mongoose.connect('mongodb://localhost/test');
const Schema = mongoose.Schema;
var comments = new Schema({
user_id: { type: Schema.Types.ObjectId, ref: 'users',required: [true,'No user id found']},
post: { type: Schema.Types.ObjectId, ref: 'posts',required: [true,'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));
Database shows this:
数据库显示：
mb:test$ db.comments.find().pretty()
{
"_id" : ObjectId("578e5cbd5b080fbfb7bed3d0"),
"post" : ObjectId("578df3efb618f5141202a196"),
"user_id" : ObjectId("578df3efb618f5141202a196"),
"__v" : 0
}
回答by Azeem Malik
use this
用这个
var mongoose = require('mongoose');
var str = '578df3efb618f5141202a196';
var mongoObjectId = mongoose.Types.ObjectId(str);
