[英]How to update all nested documents of an array in a selected document in mongoose?
在某種情況下,我需要更新嵌套在Mongoose模型中的數組中的所有文檔的字段。
我將上傳圖像的新嵌套文檔添加到Users集合中,我需要將所有先前文檔的“is_available”設置為false,並將新插入文檔的“is_available”字段設置為true。
我搜索和發現的所有內容都是關於更新具有特定ID或過濾器的嵌套文檔。 但我沒有找到更新模型中數組的所有嵌套文檔的特定字段的方法。
我的型號:
var mongoose = require("mongoose");
var Schema = mongoose.Schema;
var UsersSchema = new Schema({
name: { type: String, default: "" },
lastname: { type: String, default: "" },
images: [{
dir: { type: String },
is_available: { type: Boolean }
}]
});
var Users = mongoose.model("Users", UsersSchema, "users");
module.exports = Users;
實際結果:
{
"_id" : ObjectId("5ce950aa4sw435ty503ab83b"),
"name" : "Sina",
"image" : [
{
"_id" : ObjectId("5cf4dd3da6b4gb6bcf9c6dc1"),
"dir" : "profiledirectory/804eafeaf8acc40a3d6.jpg",
"is_available" : true
},
{
"_id" : ObjectId("5cf4fffs2419316bddffgg82"),
"dir" : "profiledirectory/d85b01ac40fa6b1a7c1.jpg",
"is_available" : true
},
{
"_id" : ObjectId("5cf4ff334fhd316bef2fdt40"),
"dir" : "profiledirectory/512d9d19da7a4322b37.jpg",
"is_available" : true
}
]
}
預期結果:
{
"_id" : ObjectId("5ce950aa4sw435ty503ab83b"),
"name" : "Sina",
"image" : [
{
"_id" : ObjectId("5cf4dd3da6b4gb6bcf9c6dc1"),
"dir" : "profiledirectory/804eafeaf8acc40a3d6.jpg",
"is_available" : false
},
{
"_id" : ObjectId("5cf4fffs2419316bddffgg82"),
"dir" : "profiledirectory/d85b01ac40fa6b1a7c1.jpg",
"is_available" : false
},
{
"_id" : ObjectId("5cf4ff334fhd316bef2fdt40"),
"dir" : "profiledirectory/512d9d19da7a4322b37.jpg",
"is_available" : true
}
]
}
Code Snippet:
let updateQuery = {
$set: { 'image.$.is_available': false },
$push: {
image: [
{
dir: "profiledirectory/558bb6938ecd54bde556af122a4.jpg",
is_available: true
}
]
}
}
let findQuery = { _id: req.body.user_id }
Users.findOneAndUpdate(findQuery,
updateQuery, function (err, doc) {
if (err) {
res.send(err.message)
} else {
res.send('successful')
}
})
上傳文件后,您必須找到用戶
// after upload image
User.findOne({_id:req.user._id}).lean().exec((err,user)=>{
if(!err && user){
// setting all previous images to false
user.image.forEach(image=>{
image.is_available=false;
});
// now pushing new uploded item to image array
let newImage={"dir" : "path of uploaded item here" , "is_available" : true};
user.image.push(newImage);
user.save((err,updated)=>{
if(!err && updated){
return res.status(200).json({status:"success",message:"User updated"});
}
});
}
});
根據您提到的內容,您不斷動態地向圖像字段添加對象,每次添加新對象時,都應使用is_available:false覆蓋現有對象:false
eventObject.find(query).lean().exec(function (err, response) {
if (err) {
logger.error(err);
return reject(err.message)
}
// Assuming there will be only one record based on the query you make
if(response.length>0){
response[0].images = response.images.map((image)=>{
image.is_available = false
return image
})
// Now append your new image to the modified response
response[0].images.push(newimage)// this should be the newImage object
// Now use findOneAndUpdate to update the existing doc by querying with id or according to your usecase
eventObject.findOneAndUpdate(query, response[0], { upsert: true }, (err, data) => {
if (err) {
return reject(err)
}
logger.info(data);
return resolve(newData);
})
}
})
所以基本的方法是,
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.