我正在使用mongoose人口加入文件
var UsersSchema = Schema({
username: String,
password: {type: String, select: false },
fname: String,
lname: String,
role: String,
apps: [
{
//using populate here
app: {type:ObjectId, ref: "applications"},
pinned: Boolean
}
]
}, { collection : 'user' });
这就像这样被称为
findById: function(id, items, callback){
User.findById(id, items , function(err, doc){
callback(doc);
}).populate("apps.app");
}
这一切都很常见。我的问题是当我想将新应用程序推入正在填充的值时。这就是我在做的事。
客户端：
$.ajax({
type: "PUT",
url: userUrl + userId,
contentType: "application/json",
data: JSON.stringify({
"app": currentApp.attributes._id,
"pinned": false
}),
success: function(){
console.log("Success");
}
})
节点服务器：
User.findByIdAndUpdate(id,
{
$push : {
apps : {
pinned:updateObj.pinned,
app:updateObj.app
}
}
}, options, function(err, data){
callback(data);
});
这似乎也更正了更新。问题是它被添加到我的Mongo文档的方式
{
"_id": {
"$oid": "520953dde4b00c03eeb39950"
},
"apps": [
{
"app": "5217685be4b061d31fe3cc41",
"pinned": true
},
{
"app": "5208edb2e4b0b41ab826aca1",
"pinned": false
},
//this is what was added
{
"pinned": false,
"app": {
"$oid": "5208ed90e4b0b41ab826ac9f"
},
"_id": {
"$oid": "5217ac368d334b020000000a"
}
}
],
"fname": "Frank",
"lname": "Miggz",
"password": "password123",
"role": "2",
"username": "blah"
}
我如何：
删除_id 只有app的值显示，所以看起来像这样
"app": "5208ed90e4b0b41ab826ac9f"
答案 0 :(得分：0)
刚刚意识到我预先填充的值应该采用我要回复的格式，因为它在Schema中设置为“type：ObjectId”。我相信我必须重新填充以匹配ObjectId结构
答案 1 :(得分：0)
另一个库可能会使这类操作更容易https://www.npmjs.com/package/@coolgk/mongo
文档中的示例：
原始数据：
{
_id: '5a8c16f3c452fd2c0d3687c6',
_dateModified: '2018-02-20T12:39:15.258Z', // auto generated
title: 'Support Ticket 1',
messages: [{
_id: '5a8c16f3c452fd2c0d3687c9', // auto generated
user: 'customer',
message: 'I found a bug',
_dateModified: '2018-02-20T12:39:15.259Z' // auto generated
},
{
_id: '5a8c16f3c452fd2c0d3687c8', // auto generated
user: 'support',
message: 'Restart your computer',
_dateModified: '2018-02-20T12:39:15.259Z' // auto generated
},
{
_id: '5a8c16f3c452fd2c0d3687c7', // auto generated
user: 'developer',
message: 'That\'s not a bug, it\'s a feature',
_dateModified: '2018-02-20T12:39:15.259Z' // auto generated
}
]
}
下面的脚本将更新"message"数组中seconnd文档的"messages"字段的值。
model.updateOne({
_id: '5a8c16f3c452fd2c0d3687c6', // find the document by _id in the collection
messages: [
{
_id: '5a8c16f3c452fd2c0d3687c8', // find the document by _id in the array
message: 'Turn on your computer' // update only the message field, other fields will not change
}
]
});
集合中的数据变为
{
_id: '5a8c16f3c452fd2c0d3687c6',
title: 'Support Ticket 1',
messages: [{
_id: '5a8c16f3c452fd2c0d3687c9',
user: 'customer',
message: 'I found a bug',
_dateModified: '2018-02-20T12:39:15.259Z',
},
{
_id: '5a8c16f3c452fd2c0d3687c8',
user: 'support',
message: 'Turn on your computer', // new value
_dateModified: '2018-02-20T12:53:55.890Z' // new modified date
},
{
_id: '5a8c16f3c452fd2c0d3687c7',
user: 'developer',
message: 'That\'s not a bug, it\'s a feature',
_dateModified: '2018-02-20T12:39:15.259Z'
}
],
_dateModified: '2018-02-20T12:53:55.889Z' // new modified date
}
下面的脚本将删除"messages"数组中的seconnd文档。
model.updateOne({
_id: '5a8c16f3c452fd2c0d3687c6', // find the document by _id in the collection
messages: {
$delete: [ '5a8c16f3c452fd2c0d3687c8' ] // $delete operator: delete by _id
}
});
集合中的数据变为
{
_id: '5a8c16f3c452fd2c0d3687c6',
title: 'Support Ticket 1',
messages: [{
_id: '5a8c16f3c452fd2c0d3687c9',
user: 'customer',
message: 'I found a bug',
_dateModified: '2018-02-20T12:39:15.259Z'
},
{
_id: '5a8c16f3c452fd2c0d3687c7',
user: 'developer',
message: 'That\'s not a bug, it\'s a feature',
_dateModified: '2018-02-20T12:39:15.259Z'
}
],
_dateModified: '2018-02-20T12:59:05.602Z' // new modified date
}
model.updateOne({
_id: '5a8c16f3c452fd2c0d3687c6', // find the document by _id in the collection
messages: {
$replace: [] // replace the entire array with a new value
}
});
与更新类似，但在子文档中没有_id。下面的脚本会将新文档添加到messages数组中。
model.updateOne({
_id: '5a8c16f3c452fd2c0d3687c6', // find the document by _id in the collection
messages: [
{ // documents without _id = insert new
user: 'Support',
message: 'Please Ctrl + F5'
}
]
});
集合中的数据变为
{
_id: '5a8c16f3c452fd2c0d3687c6',
title: 'Support Ticket 1',
messages: [{
_id: '5a8c16f3c452fd2c0d3687c9',
user: 'customer',
message: 'I found a bug',
_dateModified: '2018-02-20T12:39:15.259Z'
},
{
_id: '5a8c16f3c452fd2c0d3687c7',
user: 'developer',
message: 'That\'s not a bug, it\'s a feature',
_dateModified: '2018-02-20T12:39:15.259Z'
},
{ // new document
_id: '5a8c1d6b082a652c35eb17d6', // auto generated
user: 'Support',
message: 'Please Ctrl + F5',
_dateModified: '2018-02-20T13:06:51.244Z' // auto generated
}
],
_dateModified: '2018-02-20T13:06:51.243Z' // new modified date
}
添加，更新和删除可以在一个查询中进行。
model.updateOne({
_id: '5a8c16f3c452fd2c0d3687c6', // find the document by _id in the collection
messages: {
$update: [
{ // doc contains _id value, this is an update
_id: '5a8c1d6b082a652c35eb17d6', // find the document by _id in the array
message: 'Clear Your Cache' // update only the message field, other fields will not change
},
{ // doc has no _id value, this is an insert
user: 'developer',
message: 'cannot replicate, not a bug!'
}
],
$delete: [ '5a8c16f3c452fd2c0d3687c9' ] // delete by _id (the first doc)
}
});
最终结果
{
_id: '5a8c16f3c452fd2c0d3687c6',
title: 'Support Ticket 1',
messages: [{
_id: '5a8c16f3c452fd2c0d3687c7'，
user: 'developer',
message: 'That\'s not a bug, it\'s a feature',
_dateModified: '2018-02-20T12:39:15.259Z'
},
{
_id: '5a8c1d6b082a652c35eb17d6'，
user: 'Support',
message: 'Clear Your Cache', // new value
_dateModified: '2018-02-20T13:30:07.123Z' // new modified date
},
{ // new doc
_id: '5a8c22df4656722c3fd787fa'，// auto generated
user: 'developer',
message: 'cannot replicate, not a bug!',
_dateModified: '2018-02-20T13:30:07.123Z' // auto generated
}
],
_dateModified: '2018-02-20T13:30:07.121Z' // new modified date
}