[英]Mongoose .populate() not populating
我嘗試了一些不同的東西,我只是不能讓Mongoose將Users
信息填充到Items
集合中。
文件: users.js
var mongoose = require( 'mongoose' )
Schema = mongoose.Schema,
ObjectId = Schema.Types.ObjectId;
var userSchema = Schema( {
_id: ObjectId,
barcode: String,
name: String,
email: String,
type: String
} );
var Users = mongoose.model( 'Users', userSchema );
module.exports = Users;
module.exports.schema = userSchema;
文件: items.js
var mongoose = require( 'mongoose' )
Schema = mongoose.Schema,
ObjectId = Schema.ObjectId,
Users = require( __dirname + '/users' ),
userSchema = Users.schema;
var itemSchema = Schema( {
_id: ObjectId,
name: String,
barcode: String,
transactions: [ {
date: Date,
user: { type: ObjectId, ref: 'Users' },
status: String
} ]
} );
var Items = mongoose.model( 'Items', itemSchema );
module.exports = Items;
module.exports.schema = itemSchema;
這是我的測試代碼:
var mongoose = require( 'mongoose' );
mongoose.connect( 'mongodb://localhost/booker' );
var Users = require( __dirname + '/models/users' );
var Items = require( __dirname + '/models/items' );
Items.findOne().populate( 'user' ).exec( function( err, arr ) {
console.log( arr );
} );
基本上問題是數組沒有將用戶信息填充到項目中。
我究竟做錯了什么?
您正在填充的user
字段嵌套在transactions
數組字段的子文檔中,因此您需要在populate
調用中包含其完整路徑:
Items.findOne().populate( 'transactions.user' ).exec( function( err, arr ) {
console.log( arr );
} );
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