Merging two objects in node - node.js

Question

This is my structure
[{
"date": "2019-01-10T18:30:00.000Z",
"time": "2019-01-11T04:37:49.587Z",
"abc_Info": {
"_id": "5c381da651f18d5040611eb2",
"abc": 2.5,
"guardian": "XYZ"
}
}]
What I want is
[{
"date": "2019-01-10T18:30:00.000Z",
"time": "2019-01-11T04:37:49.587Z",
"abc": 2.5,
"guardian": "XYZ"
}]
Code
this._model.find(params, (err, docs) => {
if (err) {
var response = this.errorResponse("error", 500, null);
res.send(response);
} else {
for (var i = 0; i < docs.length; i++) {
const abc= {
"date": docs[i].date,
"time": docs[i].time,
"abc_Info":docs[i].abc_Info //this is object, i couldn't select value separately from this object
}
if (docs[i].abc_Info != undefined) {
abcArray.push(abc);
}
}
res.send(abc);
}
});
I am trying to select values from object like "abc_Info":docs[i].abc_Info.abc but I couldn't do it, Its throwing error.
There are two way I can achieve this.
Selecting values directly from object and store in variable. That is throwing error for me
Merging date and time with abc_Info. I don't know how to do that

Answer 1

Chnage this.
const abc= {
"date": docs[i].date,
"time": docs[i].time,
"abc":docs[i].abc_Info.abc,
"guardian":docs[i].abc_Info.guardian
}

Answer 2

hope it will be helpful
var d=[{
"date": "2019-01-10T18:30:00.000Z",
"time": "2019-01-11T04:37:49.587Z",
"abc_Info": {
"_id": "5c381da651f18d5040611eb2",
"abc": 2.5,
"guardian": "XYZ"
}
}]
d[0]=Object.assign(d[0],d[0].abc_Info);
delete d[0]['abc_Info'];
delete d[0]['_id'];
console.log(d);

Answer 3

let x = {
"date": "2019-01-10T18:30:00.000Z",
"time": "2019-01-11T04:37:49.587Z",
}
let abc_Info = {
"_id": "5c381da651f18d5040611eb2",
"abc": 2.5,
"guardian": "XYZ"
}
// to concat
let z = {...x, ...abc_Info}
console.log(z)
You can use the above ES6 spread operator for the cause
Object.assign is quite better in performance so it'll be like this:
Or let z = Object.assign(x, abc_info);
In your code it should be like this:
const abc= {...{
"date": docs[i].date,
"time": docs[i].time,
}, ...docs[i].abc_Info}

Answer 4

Use Spread operator and also rather using for loop and push, use Array.prototype.map
let docs= [{
"date": "2019-01-10T18:30:00.000Z",
"time": "2019-01-11T04:37:49.587Z",
"abc_Info": {
"_id": "5c381da651f18d5040611eb2",
"abc": 2.5,
"guardian": "XYZ"
}
}]
let abcArray = docs.map(({date, time, abc_Info}) => {
delete abc_Info._id;
return {date, time, ...abc_Info }
});
console.log(abcArray)

Answer 5

Sorry Its my mistake. I should have declared object inside if statement. Its working now
if (docs[i].abc_Info != undefined) {
const abc= {
"date": docs[i].date,
"time": docs[i].time,
"abc_Info":docs[i].abc_Info
}
abcArray.push(abc);
}