set model values from json in nodejs - json

Question

Hi Guys I want to know how to save json string into mongoose model object?
let me explain a simplified version of my problem:
I have a schema model:
const mongo = require('mongoose');
const clientSchema = mongo.Schema({
name: {type: String},
age: {type: Number},
updated_at: {type: Date},
}
and I have a put method which is shown below:
var Client = mongo.model('client', clientSchema);
//Update User
server.put(`/api/clients/:_id`, (req, res) =>
{
Client.model.findById(req.params._id, (err, foundedclient) =>
{
if(err) res.send(err);
//***********************************************************//
/*I want to update foundedclient from req.body here! */
/*some function like : foundedclient.JsonTovalues(req.body); */
//***********************************************************//
foundedclient.updated_at = new Date().toISOString();
foundedclient.save((err) =>
{
res.send('saved successfully!');
});
});
});
the req.body is a json:
{
"name":"bardia",
"age":27,
}
I want to update foundedclient value from req.body at the position I highlighted in the code by //*******// signs. I want a hypothetical function such as foundedclient.JsonTovalues(req.body). what is the best way to achieve that? In other words what is the best way to save json as mode values?
Thank a lot

Answer 1

you can define an instance method to something similar to updateByJson as explained below
const clientSchema = mongo.Schema({
name: {type: String},
age: {type: Number},
updated_at: {type: Date},
}
// here simply calling update method internally but exposed as an instance method
clientSchema.methods.updateByJson = function(jsonToUpdate, cb){
// will work if you are using mongoose old version 3.x
this.constructor.update({_id: this._id}, {$set:jsonToUpdate}, cb);
// should work with latest versions
this.model('client').update({_id: this._id}, {$set:jsonToUpdate}, cb);
}
Your client code will look like this
var Client = mongo.model('client', clientSchema);
//Update User
server.put(`/api/clients/:_id`, (req, res) =>
{
Client.model.findById(req.params._id, (err, foundedclient) =>
{
if(err) res.send(err);
jsonToUpdate = req.body
jsonToUpdate.updated_at = new Date().toISOString();
foundedclient.updateByJson(jsonToUpdate, (err) => {
res.send('saved successfully!');
});
});
});
I hope this helps you.