I need to remove certain fields from the JSON response. I've used the toJSON() method for doing this. Here is the code of my modal method for it.
User.methods.toJSON = function () {
let obj = this.toObject()
delete obj.resetPasswordToken
delete obj.resetPasswordExpire
delete obj.otp
delete obj.otpExpire
return obj
}
The above code is working fine but when I populate the User modal with my Media model it doesn't remove the fields that I deleted from the JSON response.
const allMedia = await Media.find({}).populate({
path: 'uploadedBy', // this is the user document
})
This is the code I wrote for populating the user model with the media model. But the problem is User gets populated with Media but it doesn't ignore the fields that I deleted from toJSON() method.
{
"name": null,
"sizes": [],
"isPrivate": false,
"_id": "61d6d1a1fcaf7337f6f186de",
"path": "http://192.168.1.7:2121/uploads/2022/1/7b37e2bc-b313-4b08-abd6-101e99c36527.png",
"uploadedBy": {
"firstName": "abc",
"lastName": "abc",
"role": "ADMIN",
"resetPasswordToken": "77bda3f7794d305d7771fc23d932e1e9922df02c71b02c3564ad46b22ceac27e",
"resetPasswordExpire": "1640954443294",
"otp": null,
"otpExpire": null,
"_id": "61ceea9ce989f2d986fa9c5c",
"userName": "abc",
"email": "abc@gmail.com",
"createdAt": "2021-12-31T11:33:48.066Z",
"updatedAt": "2021-12-31T13:08:36.245Z"
},
"createdAt": "2022-01-06T11:25:21.839Z",
"updatedAt": "2022-01-06T11:25:21.839Z"
}
If anyone can help, it would be appreciated.
Thanks in advance,
You can define pre hook for each query for Media schema.
const mongoose = require('mongoose');
const Schema = mongoose.Schema;
const schema = new Schema(...);
schema.pre('find', function () {
this.populate('uploadedBy');
this.select('-resetPasswordToken -resetPasswordExpire -otp -otpExpire');
});
You can add new pre hooks for other queries, just like for the find.
You can find more details here.
here is an example using Aggregation
const allMedia = await Media.aggragate([
$lookup: {
from: 'uploadedBy',
localField: 'uploadedBy',
foreignField: '_id',
// your variable
as: 'uploadedBy',
},
{
$project: {
//removing the field you want to remove by attibuting a Zero
resetPasswordToken:0,
resetPasswordExpire: 0,
otp:0,
otpExpire:0
// select the field you want to display
fieldYouWantoToDisplay: 1,
},
},
])